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-rw-r--r--activerecord/test/cases/adapter_test.rb1
-rw-r--r--activerecord/test/cases/adapters/mysql2/active_schema_test.rb1
-rw-r--r--activerecord/test/cases/adapters/mysql2/bind_parameter_test.rb1
-rw-r--r--activerecord/test/cases/adapters/mysql2/boolean_test.rb1
-rw-r--r--activerecord/test/cases/adapters/mysql2/case_sensitivity_test.rb1
-rw-r--r--activerecord/test/cases/adapters/mysql2/charset_collation_test.rb1
-rw-r--r--activerecord/test/cases/adapters/mysql2/connection_test.rb1
-rw-r--r--activerecord/test/cases/adapters/mysql2/datetime_precision_quoting_test.rb1
-rw-r--r--activerecord/test/cases/adapters/mysql2/enum_test.rb1
-rw-r--r--activerecord/test/cases/adapters/mysql2/explain_test.rb1
-rw-r--r--activerecord/test/cases/adapters/mysql2/json_test.rb1
-rw-r--r--activerecord/test/cases/adapters/mysql2/mysql2_adapter_test.rb1
-rw-r--r--activerecord/test/cases/adapters/mysql2/schema_migrations_test.rb1
-rw-r--r--activerecord/test/cases/adapters/mysql2/schema_test.rb1
-rw-r--r--activerecord/test/cases/adapters/mysql2/sp_test.rb1
-rw-r--r--activerecord/test/cases/adapters/mysql2/sql_types_test.rb1
-rw-r--r--activerecord/test/cases/adapters/mysql2/table_options_test.rb1
-rw-r--r--activerecord/test/cases/adapters/mysql2/transaction_test.rb1
-rw-r--r--activerecord/test/cases/adapters/mysql2/unsigned_type_test.rb1
-rw-r--r--activerecord/test/cases/adapters/mysql2/virtual_column_test.rb1
-rw-r--r--activerecord/test/cases/adapters/postgresql/active_schema_test.rb1
-rw-r--r--activerecord/test/cases/adapters/postgresql/array_test.rb1
-rw-r--r--activerecord/test/cases/adapters/postgresql/bit_string_test.rb1
-rw-r--r--activerecord/test/cases/adapters/postgresql/bytea_test.rb1
-rw-r--r--activerecord/test/cases/adapters/postgresql/case_insensitive_test.rb1
-rw-r--r--activerecord/test/cases/adapters/postgresql/change_schema_test.rb1
-rw-r--r--activerecord/test/cases/adapters/postgresql/cidr_test.rb1
-rw-r--r--activerecord/test/cases/adapters/postgresql/citext_test.rb1
-rw-r--r--activerecord/test/cases/adapters/postgresql/collation_test.rb1
-rw-r--r--activerecord/test/cases/adapters/postgresql/composite_test.rb1
-rw-r--r--activerecord/test/cases/adapters/postgresql/connection_test.rb1
-rw-r--r--activerecord/test/cases/adapters/postgresql/datatype_test.rb1
-rw-r--r--activerecord/test/cases/adapters/postgresql/domain_test.rb1
-rw-r--r--activerecord/test/cases/adapters/postgresql/enum_test.rb1
-rw-r--r--activerecord/test/cases/adapters/postgresql/explain_test.rb1
-rw-r--r--activerecord/test/cases/adapters/postgresql/extension_migration_test.rb1
-rw-r--r--activerecord/test/cases/adapters/postgresql/full_text_test.rb1
-rw-r--r--activerecord/test/cases/adapters/postgresql/geometric_test.rb1
-rw-r--r--activerecord/test/cases/adapters/postgresql/hstore_test.rb1
-rw-r--r--activerecord/test/cases/adapters/postgresql/infinity_test.rb1
-rw-r--r--activerecord/test/cases/adapters/postgresql/integer_test.rb1
-rw-r--r--activerecord/test/cases/adapters/postgresql/json_test.rb1
-rw-r--r--activerecord/test/cases/adapters/postgresql/ltree_test.rb1
-rw-r--r--activerecord/test/cases/adapters/postgresql/money_test.rb1
-rw-r--r--activerecord/test/cases/adapters/postgresql/network_test.rb1
-rw-r--r--activerecord/test/cases/adapters/postgresql/numbers_test.rb1
-rw-r--r--activerecord/test/cases/adapters/postgresql/postgresql_adapter_test.rb1
-rw-r--r--activerecord/test/cases/adapters/postgresql/prepared_statements_disabled_test.rb1
-rw-r--r--activerecord/test/cases/adapters/postgresql/quoting_test.rb1
-rw-r--r--activerecord/test/cases/adapters/postgresql/range_test.rb1
-rw-r--r--activerecord/test/cases/adapters/postgresql/referential_integrity_test.rb1
-rw-r--r--activerecord/test/cases/adapters/postgresql/rename_table_test.rb1
-rw-r--r--activerecord/test/cases/adapters/postgresql/schema_authorization_test.rb1
-rw-r--r--activerecord/test/cases/adapters/postgresql/schema_test.rb1
-rw-r--r--activerecord/test/cases/adapters/postgresql/serial_test.rb1
-rw-r--r--activerecord/test/cases/adapters/postgresql/statement_pool_test.rb1
-rw-r--r--activerecord/test/cases/adapters/postgresql/timestamp_test.rb1
-rw-r--r--activerecord/test/cases/adapters/postgresql/transaction_test.rb1
-rw-r--r--activerecord/test/cases/adapters/postgresql/type_lookup_test.rb1
-rw-r--r--activerecord/test/cases/adapters/postgresql/utils_test.rb1
-rw-r--r--activerecord/test/cases/adapters/postgresql/uuid_test.rb1
-rw-r--r--activerecord/test/cases/adapters/postgresql/xml_test.rb1
-rw-r--r--activerecord/test/cases/adapters/sqlite3/collation_test.rb1
-rw-r--r--activerecord/test/cases/adapters/sqlite3/copy_table_test.rb1
-rw-r--r--activerecord/test/cases/adapters/sqlite3/explain_test.rb1
-rw-r--r--activerecord/test/cases/adapters/sqlite3/quoting_test.rb1
-rw-r--r--activerecord/test/cases/adapters/sqlite3/sqlite3_adapter_test.rb1
-rw-r--r--activerecord/test/cases/adapters/sqlite3/sqlite3_create_folder_test.rb1
-rw-r--r--activerecord/test/cases/adapters/sqlite3/statement_pool_test.rb1
-rw-r--r--activerecord/test/cases/aggregations_test.rb1
-rw-r--r--activerecord/test/cases/ar_schema_test.rb1
-rw-r--r--activerecord/test/cases/associations/association_scope_test.rb1
-rw-r--r--activerecord/test/cases/associations/belongs_to_associations_test.rb1
-rw-r--r--activerecord/test/cases/associations/bidirectional_destroy_dependencies_test.rb1
-rw-r--r--activerecord/test/cases/associations/callbacks_test.rb1
-rw-r--r--activerecord/test/cases/associations/cascaded_eager_loading_test.rb1
-rw-r--r--activerecord/test/cases/associations/eager_load_includes_full_sti_class_test.rb1
-rw-r--r--activerecord/test/cases/associations/eager_load_nested_include_test.rb1
-rw-r--r--activerecord/test/cases/associations/eager_singularization_test.rb1
-rw-r--r--activerecord/test/cases/associations/eager_test.rb1
-rw-r--r--activerecord/test/cases/associations/extension_test.rb1
-rw-r--r--activerecord/test/cases/associations/has_and_belongs_to_many_associations_test.rb1
-rw-r--r--activerecord/test/cases/associations/has_many_associations_test.rb1
-rw-r--r--activerecord/test/cases/associations/has_many_through_associations_test.rb1
-rw-r--r--activerecord/test/cases/associations/has_one_associations_test.rb1
-rw-r--r--activerecord/test/cases/associations/has_one_through_associations_test.rb1
-rw-r--r--activerecord/test/cases/associations/inner_join_association_test.rb1
-rw-r--r--activerecord/test/cases/associations/inverse_associations_test.rb1
-rw-r--r--activerecord/test/cases/associations/join_model_test.rb1
-rw-r--r--activerecord/test/cases/associations/left_outer_join_association_test.rb1
-rw-r--r--activerecord/test/cases/associations/nested_through_associations_test.rb1
-rw-r--r--activerecord/test/cases/associations/required_test.rb1
-rw-r--r--activerecord/test/cases/associations_test.rb1
-rw-r--r--activerecord/test/cases/attribute_decorators_test.rb1
-rw-r--r--activerecord/test/cases/attribute_methods/read_test.rb1
-rw-r--r--activerecord/test/cases/attribute_methods_test.rb1
-rw-r--r--activerecord/test/cases/attribute_set_test.rb1
-rw-r--r--activerecord/test/cases/attribute_test.rb1
-rw-r--r--activerecord/test/cases/attributes_test.rb1
-rw-r--r--activerecord/test/cases/autosave_association_test.rb1
-rw-r--r--activerecord/test/cases/base_test.rb1
-rw-r--r--activerecord/test/cases/batches_test.rb1
-rw-r--r--activerecord/test/cases/binary_test.rb1
-rw-r--r--activerecord/test/cases/bind_parameter_test.rb1
-rw-r--r--activerecord/test/cases/cache_key_test.rb1
-rw-r--r--activerecord/test/cases/calculations_test.rb1
-rw-r--r--activerecord/test/cases/callbacks_test.rb1
-rw-r--r--activerecord/test/cases/clone_test.rb1
-rw-r--r--activerecord/test/cases/coders/json_test.rb1
-rw-r--r--activerecord/test/cases/coders/yaml_column_test.rb1
-rw-r--r--activerecord/test/cases/collection_cache_key_test.rb1
-rw-r--r--activerecord/test/cases/column_alias_test.rb1
-rw-r--r--activerecord/test/cases/column_definition_test.rb1
-rw-r--r--activerecord/test/cases/comment_test.rb1
-rw-r--r--activerecord/test/cases/connection_adapters/adapter_leasing_test.rb1
-rw-r--r--activerecord/test/cases/connection_adapters/connection_handler_test.rb1
-rw-r--r--activerecord/test/cases/connection_adapters/connection_specification_test.rb1
-rw-r--r--activerecord/test/cases/connection_adapters/merge_and_resolve_default_url_config_test.rb1
-rw-r--r--activerecord/test/cases/connection_adapters/mysql_type_lookup_test.rb1
-rw-r--r--activerecord/test/cases/connection_adapters/schema_cache_test.rb1
-rw-r--r--activerecord/test/cases/connection_adapters/type_lookup_test.rb1
-rw-r--r--activerecord/test/cases/connection_management_test.rb1
-rw-r--r--activerecord/test/cases/connection_pool_test.rb1
-rw-r--r--activerecord/test/cases/connection_specification/resolver_test.rb1
-rw-r--r--activerecord/test/cases/core_test.rb1
-rw-r--r--activerecord/test/cases/counter_cache_test.rb1
-rw-r--r--activerecord/test/cases/custom_locking_test.rb1
-rw-r--r--activerecord/test/cases/database_statements_test.rb1
-rw-r--r--activerecord/test/cases/date_test.rb1
-rw-r--r--activerecord/test/cases/date_time_precision_test.rb1
-rw-r--r--activerecord/test/cases/date_time_test.rb1
-rw-r--r--activerecord/test/cases/defaults_test.rb1
-rw-r--r--activerecord/test/cases/dirty_test.rb1
-rw-r--r--activerecord/test/cases/disconnected_test.rb1
-rw-r--r--activerecord/test/cases/dup_test.rb1
-rw-r--r--activerecord/test/cases/enum_test.rb1
-rw-r--r--activerecord/test/cases/errors_test.rb1
-rw-r--r--activerecord/test/cases/explain_subscriber_test.rb1
-rw-r--r--activerecord/test/cases/explain_test.rb1
-rw-r--r--activerecord/test/cases/finder_respond_to_test.rb1
-rw-r--r--activerecord/test/cases/finder_test.rb1
-rw-r--r--activerecord/test/cases/fixture_set/file_test.rb1
-rw-r--r--activerecord/test/cases/fixtures_test.rb1
-rw-r--r--activerecord/test/cases/forbidden_attributes_protection_test.rb1
-rw-r--r--activerecord/test/cases/habtm_destroy_order_test.rb1
-rw-r--r--activerecord/test/cases/helper.rb1
-rw-r--r--activerecord/test/cases/hot_compatibility_test.rb1
-rw-r--r--activerecord/test/cases/i18n_test.rb1
-rw-r--r--activerecord/test/cases/inheritance_test.rb1
-rw-r--r--activerecord/test/cases/integration_test.rb1
-rw-r--r--activerecord/test/cases/invalid_connection_test.rb1
-rw-r--r--activerecord/test/cases/invertible_migration_test.rb1
-rw-r--r--activerecord/test/cases/json_attribute_test.rb1
-rw-r--r--activerecord/test/cases/json_serialization_test.rb1
-rw-r--r--activerecord/test/cases/json_shared_test_cases.rb1
-rw-r--r--activerecord/test/cases/locking_test.rb1
-rw-r--r--activerecord/test/cases/log_subscriber_test.rb1
-rw-r--r--activerecord/test/cases/migration/change_schema_test.rb1
-rw-r--r--activerecord/test/cases/migration/change_table_test.rb1
-rw-r--r--activerecord/test/cases/migration/column_attributes_test.rb1
-rw-r--r--activerecord/test/cases/migration/column_positioning_test.rb1
-rw-r--r--activerecord/test/cases/migration/columns_test.rb1
-rw-r--r--activerecord/test/cases/migration/command_recorder_test.rb1
-rw-r--r--activerecord/test/cases/migration/compatibility_test.rb1
-rw-r--r--activerecord/test/cases/migration/create_join_table_test.rb1
-rw-r--r--activerecord/test/cases/migration/foreign_key_test.rb1
-rw-r--r--activerecord/test/cases/migration/helper.rb1
-rw-r--r--activerecord/test/cases/migration/index_test.rb1
-rw-r--r--activerecord/test/cases/migration/logger_test.rb1
-rw-r--r--activerecord/test/cases/migration/pending_migrations_test.rb1
-rw-r--r--activerecord/test/cases/migration/references_foreign_key_test.rb1
-rw-r--r--activerecord/test/cases/migration/references_index_test.rb1
-rw-r--r--activerecord/test/cases/migration/references_statements_test.rb1
-rw-r--r--activerecord/test/cases/migration/rename_table_test.rb1
-rw-r--r--activerecord/test/cases/migration_test.rb1
-rw-r--r--activerecord/test/cases/migrator_test.rb1
-rw-r--r--activerecord/test/cases/mixin_test.rb1
-rw-r--r--activerecord/test/cases/modules_test.rb1
-rw-r--r--activerecord/test/cases/multiparameter_attributes_test.rb1
-rw-r--r--activerecord/test/cases/multiple_db_test.rb1
-rw-r--r--activerecord/test/cases/nested_attributes_test.rb1
-rw-r--r--activerecord/test/cases/nested_attributes_with_callbacks_test.rb1
-rw-r--r--activerecord/test/cases/numeric_data_test.rb1
-rw-r--r--activerecord/test/cases/persistence_test.rb1
-rw-r--r--activerecord/test/cases/pooled_connections_test.rb1
-rw-r--r--activerecord/test/cases/primary_keys_test.rb1
-rw-r--r--activerecord/test/cases/query_cache_test.rb1
-rw-r--r--activerecord/test/cases/quoting_test.rb1
-rw-r--r--activerecord/test/cases/readonly_test.rb1
-rw-r--r--activerecord/test/cases/reaper_test.rb1
-rw-r--r--activerecord/test/cases/reflection_test.rb1
-rw-r--r--activerecord/test/cases/relation/delegation_test.rb1
-rw-r--r--activerecord/test/cases/relation/merging_test.rb1
-rw-r--r--activerecord/test/cases/relation/mutation_test.rb1
-rw-r--r--activerecord/test/cases/relation/or_test.rb1
-rw-r--r--activerecord/test/cases/relation/predicate_builder_test.rb1
-rw-r--r--activerecord/test/cases/relation/record_fetch_warning_test.rb1
-rw-r--r--activerecord/test/cases/relation/where_chain_test.rb1
-rw-r--r--activerecord/test/cases/relation/where_clause_test.rb1
-rw-r--r--activerecord/test/cases/relation/where_test.rb1
-rw-r--r--activerecord/test/cases/relation_test.rb1
-rw-r--r--activerecord/test/cases/relations_test.rb1
-rw-r--r--activerecord/test/cases/reload_models_test.rb1
-rw-r--r--activerecord/test/cases/reserved_word_test.rb1
-rw-r--r--activerecord/test/cases/result_test.rb1
-rw-r--r--activerecord/test/cases/sanitize_test.rb1
-rw-r--r--activerecord/test/cases/schema_dumper_test.rb1
-rw-r--r--activerecord/test/cases/schema_loading_test.rb1
-rw-r--r--activerecord/test/cases/scoping/default_scoping_test.rb1
-rw-r--r--activerecord/test/cases/scoping/named_scoping_test.rb1
-rw-r--r--activerecord/test/cases/scoping/relation_scoping_test.rb1
-rw-r--r--activerecord/test/cases/secure_token_test.rb1
-rw-r--r--activerecord/test/cases/serialization_test.rb1
-rw-r--r--activerecord/test/cases/serialized_attribute_test.rb1
-rw-r--r--activerecord/test/cases/statement_cache_test.rb1
-rw-r--r--activerecord/test/cases/store_test.rb1
-rw-r--r--activerecord/test/cases/suppressor_test.rb1
-rw-r--r--activerecord/test/cases/tasks/database_tasks_test.rb1
-rw-r--r--activerecord/test/cases/tasks/mysql_rake_test.rb1
-rw-r--r--activerecord/test/cases/tasks/postgresql_rake_test.rb1
-rw-r--r--activerecord/test/cases/tasks/sqlite_rake_test.rb1
-rw-r--r--activerecord/test/cases/test_case.rb1
-rw-r--r--activerecord/test/cases/test_fixtures_test.rb1
-rw-r--r--activerecord/test/cases/time_precision_test.rb1
-rw-r--r--activerecord/test/cases/timestamp_test.rb1
-rw-r--r--activerecord/test/cases/touch_later_test.rb1
-rw-r--r--activerecord/test/cases/transaction_callbacks_test.rb1
-rw-r--r--activerecord/test/cases/transaction_isolation_test.rb1
-rw-r--r--activerecord/test/cases/transactions_test.rb1
-rw-r--r--activerecord/test/cases/type/adapter_specific_registry_test.rb1
-rw-r--r--activerecord/test/cases/type/date_time_test.rb1
-rw-r--r--activerecord/test/cases/type/integer_test.rb1
-rw-r--r--activerecord/test/cases/type/string_test.rb1
-rw-r--r--activerecord/test/cases/type/type_map_test.rb1
-rw-r--r--activerecord/test/cases/type/unsigned_integer_test.rb1
-rw-r--r--activerecord/test/cases/type_test.rb1
-rw-r--r--activerecord/test/cases/types_test.rb1
-rw-r--r--activerecord/test/cases/unconnected_test.rb1
-rw-r--r--activerecord/test/cases/validations/absence_validation_test.rb1
-rw-r--r--activerecord/test/cases/validations/association_validation_test.rb1
-rw-r--r--activerecord/test/cases/validations/i18n_generate_message_validation_test.rb1
-rw-r--r--activerecord/test/cases/validations/i18n_validation_test.rb1
-rw-r--r--activerecord/test/cases/validations/length_validation_test.rb1
-rw-r--r--activerecord/test/cases/validations/presence_validation_test.rb1
-rw-r--r--activerecord/test/cases/validations/uniqueness_validation_test.rb1
-rw-r--r--activerecord/test/cases/validations_repair_helper.rb1
-rw-r--r--activerecord/test/cases/validations_test.rb1
-rw-r--r--activerecord/test/cases/view_test.rb1
-rw-r--r--activerecord/test/cases/yaml_serialization_test.rb1
249 files changed, 0 insertions, 249 deletions
diff --git a/activerecord/test/cases/adapter_test.rb b/activerecord/test/cases/adapter_test.rb
index dd891cb2ed..a1fb6427f9 100644
--- a/activerecord/test/cases/adapter_test.rb
+++ b/activerecord/test/cases/adapter_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/book"
require "models/post"
diff --git a/activerecord/test/cases/adapters/mysql2/active_schema_test.rb b/activerecord/test/cases/adapters/mysql2/active_schema_test.rb
index fdf83aaf88..67e1efde27 100644
--- a/activerecord/test/cases/adapters/mysql2/active_schema_test.rb
+++ b/activerecord/test/cases/adapters/mysql2/active_schema_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "support/connection_helper"
diff --git a/activerecord/test/cases/adapters/mysql2/bind_parameter_test.rb b/activerecord/test/cases/adapters/mysql2/bind_parameter_test.rb
index 9f3d1459f7..8f7c803a21 100644
--- a/activerecord/test/cases/adapters/mysql2/bind_parameter_test.rb
+++ b/activerecord/test/cases/adapters/mysql2/bind_parameter_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/topic"
diff --git a/activerecord/test/cases/adapters/mysql2/boolean_test.rb b/activerecord/test/cases/adapters/mysql2/boolean_test.rb
index 9267d15def..58698d59db 100644
--- a/activerecord/test/cases/adapters/mysql2/boolean_test.rb
+++ b/activerecord/test/cases/adapters/mysql2/boolean_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
class Mysql2BooleanTest < ActiveRecord::Mysql2TestCase
diff --git a/activerecord/test/cases/adapters/mysql2/case_sensitivity_test.rb b/activerecord/test/cases/adapters/mysql2/case_sensitivity_test.rb
index 65dc369213..50ba9ab831 100644
--- a/activerecord/test/cases/adapters/mysql2/case_sensitivity_test.rb
+++ b/activerecord/test/cases/adapters/mysql2/case_sensitivity_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
class Mysql2CaseSensitivityTest < ActiveRecord::Mysql2TestCase
diff --git a/activerecord/test/cases/adapters/mysql2/charset_collation_test.rb b/activerecord/test/cases/adapters/mysql2/charset_collation_test.rb
index e77f4a90d4..e4a6ed5482 100644
--- a/activerecord/test/cases/adapters/mysql2/charset_collation_test.rb
+++ b/activerecord/test/cases/adapters/mysql2/charset_collation_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "support/schema_dumping_helper"
diff --git a/activerecord/test/cases/adapters/mysql2/connection_test.rb b/activerecord/test/cases/adapters/mysql2/connection_test.rb
index c5ff145e74..a2faf43b0d 100644
--- a/activerecord/test/cases/adapters/mysql2/connection_test.rb
+++ b/activerecord/test/cases/adapters/mysql2/connection_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "support/connection_helper"
diff --git a/activerecord/test/cases/adapters/mysql2/datetime_precision_quoting_test.rb b/activerecord/test/cases/adapters/mysql2/datetime_precision_quoting_test.rb
index 86e72c149c..c131a5169c 100644
--- a/activerecord/test/cases/adapters/mysql2/datetime_precision_quoting_test.rb
+++ b/activerecord/test/cases/adapters/mysql2/datetime_precision_quoting_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
class Mysql2DatetimePrecisionQuotingTest < ActiveRecord::Mysql2TestCase
diff --git a/activerecord/test/cases/adapters/mysql2/enum_test.rb b/activerecord/test/cases/adapters/mysql2/enum_test.rb
index b811179c1b..7ad3e3ca2d 100644
--- a/activerecord/test/cases/adapters/mysql2/enum_test.rb
+++ b/activerecord/test/cases/adapters/mysql2/enum_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
class Mysql2EnumTest < ActiveRecord::Mysql2TestCase
diff --git a/activerecord/test/cases/adapters/mysql2/explain_test.rb b/activerecord/test/cases/adapters/mysql2/explain_test.rb
index 84c15af08d..7916921e5a 100644
--- a/activerecord/test/cases/adapters/mysql2/explain_test.rb
+++ b/activerecord/test/cases/adapters/mysql2/explain_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/developer"
require "models/computer"
diff --git a/activerecord/test/cases/adapters/mysql2/json_test.rb b/activerecord/test/cases/adapters/mysql2/json_test.rb
index 2d39db4ce2..26c69edc7b 100644
--- a/activerecord/test/cases/adapters/mysql2/json_test.rb
+++ b/activerecord/test/cases/adapters/mysql2/json_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "cases/json_shared_test_cases"
diff --git a/activerecord/test/cases/adapters/mysql2/mysql2_adapter_test.rb b/activerecord/test/cases/adapters/mysql2/mysql2_adapter_test.rb
index 7ba388bee1..565130c38f 100644
--- a/activerecord/test/cases/adapters/mysql2/mysql2_adapter_test.rb
+++ b/activerecord/test/cases/adapters/mysql2/mysql2_adapter_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "support/ddl_helper"
diff --git a/activerecord/test/cases/adapters/mysql2/schema_migrations_test.rb b/activerecord/test/cases/adapters/mysql2/schema_migrations_test.rb
index 4a421e2b91..251a50e41e 100644
--- a/activerecord/test/cases/adapters/mysql2/schema_migrations_test.rb
+++ b/activerecord/test/cases/adapters/mysql2/schema_migrations_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
class SchemaMigrationsTest < ActiveRecord::Mysql2TestCase
diff --git a/activerecord/test/cases/adapters/mysql2/schema_test.rb b/activerecord/test/cases/adapters/mysql2/schema_test.rb
index c4bf58c13e..1fad5585de 100644
--- a/activerecord/test/cases/adapters/mysql2/schema_test.rb
+++ b/activerecord/test/cases/adapters/mysql2/schema_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/post"
require "models/comment"
diff --git a/activerecord/test/cases/adapters/mysql2/sp_test.rb b/activerecord/test/cases/adapters/mysql2/sp_test.rb
index d4c4d02f79..4182532535 100644
--- a/activerecord/test/cases/adapters/mysql2/sp_test.rb
+++ b/activerecord/test/cases/adapters/mysql2/sp_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/topic"
require "models/reply"
diff --git a/activerecord/test/cases/adapters/mysql2/sql_types_test.rb b/activerecord/test/cases/adapters/mysql2/sql_types_test.rb
index c412166451..d6e7f29a5c 100644
--- a/activerecord/test/cases/adapters/mysql2/sql_types_test.rb
+++ b/activerecord/test/cases/adapters/mysql2/sql_types_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
class Mysql2SqlTypesTest < ActiveRecord::Mysql2TestCase
diff --git a/activerecord/test/cases/adapters/mysql2/table_options_test.rb b/activerecord/test/cases/adapters/mysql2/table_options_test.rb
index 54da2195d1..61a8ce9bc0 100644
--- a/activerecord/test/cases/adapters/mysql2/table_options_test.rb
+++ b/activerecord/test/cases/adapters/mysql2/table_options_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "support/schema_dumping_helper"
diff --git a/activerecord/test/cases/adapters/mysql2/transaction_test.rb b/activerecord/test/cases/adapters/mysql2/transaction_test.rb
index e447e6ec83..16101e38cb 100644
--- a/activerecord/test/cases/adapters/mysql2/transaction_test.rb
+++ b/activerecord/test/cases/adapters/mysql2/transaction_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "support/connection_helper"
diff --git a/activerecord/test/cases/adapters/mysql2/unsigned_type_test.rb b/activerecord/test/cases/adapters/mysql2/unsigned_type_test.rb
index 1703e8fef7..71dcfaa241 100644
--- a/activerecord/test/cases/adapters/mysql2/unsigned_type_test.rb
+++ b/activerecord/test/cases/adapters/mysql2/unsigned_type_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "support/schema_dumping_helper"
diff --git a/activerecord/test/cases/adapters/mysql2/virtual_column_test.rb b/activerecord/test/cases/adapters/mysql2/virtual_column_test.rb
index 85e283bfe1..442a4fb7b5 100644
--- a/activerecord/test/cases/adapters/mysql2/virtual_column_test.rb
+++ b/activerecord/test/cases/adapters/mysql2/virtual_column_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "support/schema_dumping_helper"
diff --git a/activerecord/test/cases/adapters/postgresql/active_schema_test.rb b/activerecord/test/cases/adapters/postgresql/active_schema_test.rb
index 441e84a117..b787de8453 100644
--- a/activerecord/test/cases/adapters/postgresql/active_schema_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/active_schema_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
class PostgresqlActiveSchemaTest < ActiveRecord::PostgreSQLTestCase
diff --git a/activerecord/test/cases/adapters/postgresql/array_test.rb b/activerecord/test/cases/adapters/postgresql/array_test.rb
index a642145726..121c62dadf 100644
--- a/activerecord/test/cases/adapters/postgresql/array_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/array_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "support/schema_dumping_helper"
diff --git a/activerecord/test/cases/adapters/postgresql/bit_string_test.rb b/activerecord/test/cases/adapters/postgresql/bit_string_test.rb
index d7ed0aa8dd..7712e809a2 100644
--- a/activerecord/test/cases/adapters/postgresql/bit_string_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/bit_string_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "support/connection_helper"
require "support/schema_dumping_helper"
diff --git a/activerecord/test/cases/adapters/postgresql/bytea_test.rb b/activerecord/test/cases/adapters/postgresql/bytea_test.rb
index 39d76de770..65baed34e9 100644
--- a/activerecord/test/cases/adapters/postgresql/bytea_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/bytea_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "support/schema_dumping_helper"
diff --git a/activerecord/test/cases/adapters/postgresql/case_insensitive_test.rb b/activerecord/test/cases/adapters/postgresql/case_insensitive_test.rb
index b6db6e5e28..03b44feab6 100644
--- a/activerecord/test/cases/adapters/postgresql/case_insensitive_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/case_insensitive_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
class PostgresqlCaseInsensitiveTest < ActiveRecord::PostgreSQLTestCase
diff --git a/activerecord/test/cases/adapters/postgresql/change_schema_test.rb b/activerecord/test/cases/adapters/postgresql/change_schema_test.rb
index 9d7fddfc02..ea642069d2 100644
--- a/activerecord/test/cases/adapters/postgresql/change_schema_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/change_schema_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
module ActiveRecord
diff --git a/activerecord/test/cases/adapters/postgresql/cidr_test.rb b/activerecord/test/cases/adapters/postgresql/cidr_test.rb
index fccd8b3c7b..52f2a0096c 100644
--- a/activerecord/test/cases/adapters/postgresql/cidr_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/cidr_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "ipaddr"
diff --git a/activerecord/test/cases/adapters/postgresql/citext_test.rb b/activerecord/test/cases/adapters/postgresql/citext_test.rb
index ffdd2983c6..ca95e4b626 100644
--- a/activerecord/test/cases/adapters/postgresql/citext_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/citext_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "support/schema_dumping_helper"
diff --git a/activerecord/test/cases/adapters/postgresql/collation_test.rb b/activerecord/test/cases/adapters/postgresql/collation_test.rb
index 2929c9ad94..a603221d8f 100644
--- a/activerecord/test/cases/adapters/postgresql/collation_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/collation_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "support/schema_dumping_helper"
diff --git a/activerecord/test/cases/adapters/postgresql/composite_test.rb b/activerecord/test/cases/adapters/postgresql/composite_test.rb
index 9eb422a8a3..1da2a9e2ac 100644
--- a/activerecord/test/cases/adapters/postgresql/composite_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/composite_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "support/connection_helper"
diff --git a/activerecord/test/cases/adapters/postgresql/connection_test.rb b/activerecord/test/cases/adapters/postgresql/connection_test.rb
index 3adae7e146..32afe331fa 100644
--- a/activerecord/test/cases/adapters/postgresql/connection_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/connection_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "support/connection_helper"
diff --git a/activerecord/test/cases/adapters/postgresql/datatype_test.rb b/activerecord/test/cases/adapters/postgresql/datatype_test.rb
index f947868898..0725fde5ae 100644
--- a/activerecord/test/cases/adapters/postgresql/datatype_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/datatype_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "support/ddl_helper"
diff --git a/activerecord/test/cases/adapters/postgresql/domain_test.rb b/activerecord/test/cases/adapters/postgresql/domain_test.rb
index b16e0f9265..f1eb8adb15 100644
--- a/activerecord/test/cases/adapters/postgresql/domain_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/domain_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "support/connection_helper"
diff --git a/activerecord/test/cases/adapters/postgresql/enum_test.rb b/activerecord/test/cases/adapters/postgresql/enum_test.rb
index 0f8ab8ab23..5e5a3158ba 100644
--- a/activerecord/test/cases/adapters/postgresql/enum_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/enum_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "support/connection_helper"
diff --git a/activerecord/test/cases/adapters/postgresql/explain_test.rb b/activerecord/test/cases/adapters/postgresql/explain_test.rb
index 8a0cf440fd..d79fbccf47 100644
--- a/activerecord/test/cases/adapters/postgresql/explain_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/explain_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/developer"
require "models/computer"
diff --git a/activerecord/test/cases/adapters/postgresql/extension_migration_test.rb b/activerecord/test/cases/adapters/postgresql/extension_migration_test.rb
index ba2b4e1fbf..b56c226763 100644
--- a/activerecord/test/cases/adapters/postgresql/extension_migration_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/extension_migration_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
class PostgresqlExtensionMigrationTest < ActiveRecord::PostgreSQLTestCase
diff --git a/activerecord/test/cases/adapters/postgresql/full_text_test.rb b/activerecord/test/cases/adapters/postgresql/full_text_test.rb
index fa8aadd224..5ddfe32007 100644
--- a/activerecord/test/cases/adapters/postgresql/full_text_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/full_text_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "support/schema_dumping_helper"
diff --git a/activerecord/test/cases/adapters/postgresql/geometric_test.rb b/activerecord/test/cases/adapters/postgresql/geometric_test.rb
index 34836b2421..3b6840a1c9 100644
--- a/activerecord/test/cases/adapters/postgresql/geometric_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/geometric_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "support/connection_helper"
require "support/schema_dumping_helper"
diff --git a/activerecord/test/cases/adapters/postgresql/hstore_test.rb b/activerecord/test/cases/adapters/postgresql/hstore_test.rb
index b547868b57..f9cce10fb8 100644
--- a/activerecord/test/cases/adapters/postgresql/hstore_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/hstore_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "support/schema_dumping_helper"
diff --git a/activerecord/test/cases/adapters/postgresql/infinity_test.rb b/activerecord/test/cases/adapters/postgresql/infinity_test.rb
index df5c688881..b9e177e6ec 100644
--- a/activerecord/test/cases/adapters/postgresql/infinity_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/infinity_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
class PostgresqlInfinityTest < ActiveRecord::PostgreSQLTestCase
diff --git a/activerecord/test/cases/adapters/postgresql/integer_test.rb b/activerecord/test/cases/adapters/postgresql/integer_test.rb
index 5557e869ad..b4e55964b9 100644
--- a/activerecord/test/cases/adapters/postgresql/integer_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/integer_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "active_support/core_ext/numeric/bytes"
diff --git a/activerecord/test/cases/adapters/postgresql/json_test.rb b/activerecord/test/cases/adapters/postgresql/json_test.rb
index 4438f349cc..6aa60630c2 100644
--- a/activerecord/test/cases/adapters/postgresql/json_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/json_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "cases/json_shared_test_cases"
diff --git a/activerecord/test/cases/adapters/postgresql/ltree_test.rb b/activerecord/test/cases/adapters/postgresql/ltree_test.rb
index 447d68316c..2b5ac1cac6 100644
--- a/activerecord/test/cases/adapters/postgresql/ltree_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/ltree_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "support/schema_dumping_helper"
diff --git a/activerecord/test/cases/adapters/postgresql/money_test.rb b/activerecord/test/cases/adapters/postgresql/money_test.rb
index f5c50a80c2..ea060345a7 100644
--- a/activerecord/test/cases/adapters/postgresql/money_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/money_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "support/schema_dumping_helper"
diff --git a/activerecord/test/cases/adapters/postgresql/network_test.rb b/activerecord/test/cases/adapters/postgresql/network_test.rb
index 2bbfb292c4..a33b0ef8a7 100644
--- a/activerecord/test/cases/adapters/postgresql/network_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/network_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "support/schema_dumping_helper"
diff --git a/activerecord/test/cases/adapters/postgresql/numbers_test.rb b/activerecord/test/cases/adapters/postgresql/numbers_test.rb
index 82edf7db3f..bfb2b7c27a 100644
--- a/activerecord/test/cases/adapters/postgresql/numbers_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/numbers_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
class PostgresqlNumberTest < ActiveRecord::PostgreSQLTestCase
diff --git a/activerecord/test/cases/adapters/postgresql/postgresql_adapter_test.rb b/activerecord/test/cases/adapters/postgresql/postgresql_adapter_test.rb
index 7c7bb0a942..76e0ad60fe 100644
--- a/activerecord/test/cases/adapters/postgresql/postgresql_adapter_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/postgresql_adapter_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "support/ddl_helper"
require "support/connection_helper"
diff --git a/activerecord/test/cases/adapters/postgresql/prepared_statements_disabled_test.rb b/activerecord/test/cases/adapters/postgresql/prepared_statements_disabled_test.rb
index 0120e33f70..8c62690866 100644
--- a/activerecord/test/cases/adapters/postgresql/prepared_statements_disabled_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/prepared_statements_disabled_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/computer"
require "models/developer"
diff --git a/activerecord/test/cases/adapters/postgresql/quoting_test.rb b/activerecord/test/cases/adapters/postgresql/quoting_test.rb
index 1205559558..a1e966b915 100644
--- a/activerecord/test/cases/adapters/postgresql/quoting_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/quoting_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
module ActiveRecord
diff --git a/activerecord/test/cases/adapters/postgresql/range_test.rb b/activerecord/test/cases/adapters/postgresql/range_test.rb
index 8de162a8a1..f411884dfd 100644
--- a/activerecord/test/cases/adapters/postgresql/range_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/range_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "support/connection_helper"
diff --git a/activerecord/test/cases/adapters/postgresql/referential_integrity_test.rb b/activerecord/test/cases/adapters/postgresql/referential_integrity_test.rb
index 0b17c141c8..0ff04bfa27 100644
--- a/activerecord/test/cases/adapters/postgresql/referential_integrity_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/referential_integrity_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "support/connection_helper"
diff --git a/activerecord/test/cases/adapters/postgresql/rename_table_test.rb b/activerecord/test/cases/adapters/postgresql/rename_table_test.rb
index 5b253999d5..e9e7f717ac 100644
--- a/activerecord/test/cases/adapters/postgresql/rename_table_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/rename_table_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
class PostgresqlRenameTableTest < ActiveRecord::PostgreSQLTestCase
diff --git a/activerecord/test/cases/adapters/postgresql/schema_authorization_test.rb b/activerecord/test/cases/adapters/postgresql/schema_authorization_test.rb
index db7d8ba751..f86a76e08a 100644
--- a/activerecord/test/cases/adapters/postgresql/schema_authorization_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/schema_authorization_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
class SchemaThing < ActiveRecord::Base
diff --git a/activerecord/test/cases/adapters/postgresql/schema_test.rb b/activerecord/test/cases/adapters/postgresql/schema_test.rb
index 5438665d42..f6b957476b 100644
--- a/activerecord/test/cases/adapters/postgresql/schema_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/schema_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/default"
require "support/schema_dumping_helper"
diff --git a/activerecord/test/cases/adapters/postgresql/serial_test.rb b/activerecord/test/cases/adapters/postgresql/serial_test.rb
index 4930d3f67a..d711b3b729 100644
--- a/activerecord/test/cases/adapters/postgresql/serial_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/serial_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "support/schema_dumping_helper"
diff --git a/activerecord/test/cases/adapters/postgresql/statement_pool_test.rb b/activerecord/test/cases/adapters/postgresql/statement_pool_test.rb
index 73cf91425b..146b619a4b 100644
--- a/activerecord/test/cases/adapters/postgresql/statement_pool_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/statement_pool_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
module ActiveRecord
diff --git a/activerecord/test/cases/adapters/postgresql/timestamp_test.rb b/activerecord/test/cases/adapters/postgresql/timestamp_test.rb
index c7dec25f3a..962450aada 100644
--- a/activerecord/test/cases/adapters/postgresql/timestamp_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/timestamp_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/developer"
require "models/topic"
diff --git a/activerecord/test/cases/adapters/postgresql/transaction_test.rb b/activerecord/test/cases/adapters/postgresql/transaction_test.rb
index c1b19c11f5..9b42d0383d 100644
--- a/activerecord/test/cases/adapters/postgresql/transaction_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/transaction_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "support/connection_helper"
require "concurrent/atomic/cyclic_barrier"
diff --git a/activerecord/test/cases/adapters/postgresql/type_lookup_test.rb b/activerecord/test/cases/adapters/postgresql/type_lookup_test.rb
index 688117722b..784d77a8d1 100644
--- a/activerecord/test/cases/adapters/postgresql/type_lookup_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/type_lookup_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
class PostgresqlTypeLookupTest < ActiveRecord::PostgreSQLTestCase
diff --git a/activerecord/test/cases/adapters/postgresql/utils_test.rb b/activerecord/test/cases/adapters/postgresql/utils_test.rb
index 1a655d7843..9f9e3bda2f 100644
--- a/activerecord/test/cases/adapters/postgresql/utils_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/utils_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "active_record/connection_adapters/postgresql/utils"
diff --git a/activerecord/test/cases/adapters/postgresql/uuid_test.rb b/activerecord/test/cases/adapters/postgresql/uuid_test.rb
index 49c570c917..8eddd81c38 100644
--- a/activerecord/test/cases/adapters/postgresql/uuid_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/uuid_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "support/schema_dumping_helper"
diff --git a/activerecord/test/cases/adapters/postgresql/xml_test.rb b/activerecord/test/cases/adapters/postgresql/xml_test.rb
index b0720b5a6e..826b384fb3 100644
--- a/activerecord/test/cases/adapters/postgresql/xml_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/xml_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "support/schema_dumping_helper"
diff --git a/activerecord/test/cases/adapters/sqlite3/collation_test.rb b/activerecord/test/cases/adapters/sqlite3/collation_test.rb
index f3cbb408f1..dd88ed3656 100644
--- a/activerecord/test/cases/adapters/sqlite3/collation_test.rb
+++ b/activerecord/test/cases/adapters/sqlite3/collation_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "support/schema_dumping_helper"
diff --git a/activerecord/test/cases/adapters/sqlite3/copy_table_test.rb b/activerecord/test/cases/adapters/sqlite3/copy_table_test.rb
index cc1f74ed41..e1cfd703e8 100644
--- a/activerecord/test/cases/adapters/sqlite3/copy_table_test.rb
+++ b/activerecord/test/cases/adapters/sqlite3/copy_table_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
class CopyTableTest < ActiveRecord::SQLite3TestCase
diff --git a/activerecord/test/cases/adapters/sqlite3/explain_test.rb b/activerecord/test/cases/adapters/sqlite3/explain_test.rb
index a3f6299756..29d97ae78c 100644
--- a/activerecord/test/cases/adapters/sqlite3/explain_test.rb
+++ b/activerecord/test/cases/adapters/sqlite3/explain_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/developer"
require "models/computer"
diff --git a/activerecord/test/cases/adapters/sqlite3/quoting_test.rb b/activerecord/test/cases/adapters/sqlite3/quoting_test.rb
index 0a5bf7754c..aefbb309e6 100644
--- a/activerecord/test/cases/adapters/sqlite3/quoting_test.rb
+++ b/activerecord/test/cases/adapters/sqlite3/quoting_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "bigdecimal"
require "securerandom"
diff --git a/activerecord/test/cases/adapters/sqlite3/sqlite3_adapter_test.rb b/activerecord/test/cases/adapters/sqlite3/sqlite3_adapter_test.rb
index bc6605682c..cf0c37f70c 100644
--- a/activerecord/test/cases/adapters/sqlite3/sqlite3_adapter_test.rb
+++ b/activerecord/test/cases/adapters/sqlite3/sqlite3_adapter_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/owner"
require "tempfile"
diff --git a/activerecord/test/cases/adapters/sqlite3/sqlite3_create_folder_test.rb b/activerecord/test/cases/adapters/sqlite3/sqlite3_create_folder_test.rb
index d23a7ac532..b1b4463bf1 100644
--- a/activerecord/test/cases/adapters/sqlite3/sqlite3_create_folder_test.rb
+++ b/activerecord/test/cases/adapters/sqlite3/sqlite3_create_folder_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/owner"
diff --git a/activerecord/test/cases/adapters/sqlite3/statement_pool_test.rb b/activerecord/test/cases/adapters/sqlite3/statement_pool_test.rb
index 76841c235a..37ff973397 100644
--- a/activerecord/test/cases/adapters/sqlite3/statement_pool_test.rb
+++ b/activerecord/test/cases/adapters/sqlite3/statement_pool_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
class SQLite3StatementPoolTest < ActiveRecord::SQLite3TestCase
diff --git a/activerecord/test/cases/aggregations_test.rb b/activerecord/test/cases/aggregations_test.rb
index 97be9c447a..f8136fde72 100644
--- a/activerecord/test/cases/aggregations_test.rb
+++ b/activerecord/test/cases/aggregations_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/customer"
diff --git a/activerecord/test/cases/ar_schema_test.rb b/activerecord/test/cases/ar_schema_test.rb
index aaae3736a9..5b608d8e83 100644
--- a/activerecord/test/cases/ar_schema_test.rb
+++ b/activerecord/test/cases/ar_schema_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
class ActiveRecordSchemaTest < ActiveRecord::TestCase
diff --git a/activerecord/test/cases/associations/association_scope_test.rb b/activerecord/test/cases/associations/association_scope_test.rb
index a57eb78a14..c54542ff7b 100644
--- a/activerecord/test/cases/associations/association_scope_test.rb
+++ b/activerecord/test/cases/associations/association_scope_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/post"
require "models/author"
diff --git a/activerecord/test/cases/associations/belongs_to_associations_test.rb b/activerecord/test/cases/associations/belongs_to_associations_test.rb
index af3f40974d..a727cc6e60 100644
--- a/activerecord/test/cases/associations/belongs_to_associations_test.rb
+++ b/activerecord/test/cases/associations/belongs_to_associations_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/developer"
require "models/project"
diff --git a/activerecord/test/cases/associations/bidirectional_destroy_dependencies_test.rb b/activerecord/test/cases/associations/bidirectional_destroy_dependencies_test.rb
index eee327a0bc..8a0e041864 100644
--- a/activerecord/test/cases/associations/bidirectional_destroy_dependencies_test.rb
+++ b/activerecord/test/cases/associations/bidirectional_destroy_dependencies_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/content"
diff --git a/activerecord/test/cases/associations/callbacks_test.rb b/activerecord/test/cases/associations/callbacks_test.rb
index b91fb5b7ed..f9d1e44595 100644
--- a/activerecord/test/cases/associations/callbacks_test.rb
+++ b/activerecord/test/cases/associations/callbacks_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/post"
require "models/author"
diff --git a/activerecord/test/cases/associations/cascaded_eager_loading_test.rb b/activerecord/test/cases/associations/cascaded_eager_loading_test.rb
index ea2582b507..7b0445025c 100644
--- a/activerecord/test/cases/associations/cascaded_eager_loading_test.rb
+++ b/activerecord/test/cases/associations/cascaded_eager_loading_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/post"
require "models/comment"
diff --git a/activerecord/test/cases/associations/eager_load_includes_full_sti_class_test.rb b/activerecord/test/cases/associations/eager_load_includes_full_sti_class_test.rb
index f6de62b1af..61f39b4136 100644
--- a/activerecord/test/cases/associations/eager_load_includes_full_sti_class_test.rb
+++ b/activerecord/test/cases/associations/eager_load_includes_full_sti_class_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/post"
require "models/tagging"
diff --git a/activerecord/test/cases/associations/eager_load_nested_include_test.rb b/activerecord/test/cases/associations/eager_load_nested_include_test.rb
index 83c85cd022..e9f551b6b2 100644
--- a/activerecord/test/cases/associations/eager_load_nested_include_test.rb
+++ b/activerecord/test/cases/associations/eager_load_nested_include_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/post"
require "models/tag"
diff --git a/activerecord/test/cases/associations/eager_singularization_test.rb b/activerecord/test/cases/associations/eager_singularization_test.rb
index 860bb9ac54..16eff15026 100644
--- a/activerecord/test/cases/associations/eager_singularization_test.rb
+++ b/activerecord/test/cases/associations/eager_singularization_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
class EagerSingularizationTest < ActiveRecord::TestCase
diff --git a/activerecord/test/cases/associations/eager_test.rb b/activerecord/test/cases/associations/eager_test.rb
index e0b137304b..55b294cfaa 100644
--- a/activerecord/test/cases/associations/eager_test.rb
+++ b/activerecord/test/cases/associations/eager_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/post"
require "models/tagging"
diff --git a/activerecord/test/cases/associations/extension_test.rb b/activerecord/test/cases/associations/extension_test.rb
index d2f21583a7..f707a170f5 100644
--- a/activerecord/test/cases/associations/extension_test.rb
+++ b/activerecord/test/cases/associations/extension_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/post"
require "models/comment"
diff --git a/activerecord/test/cases/associations/has_and_belongs_to_many_associations_test.rb b/activerecord/test/cases/associations/has_and_belongs_to_many_associations_test.rb
index fa40bd2ff8..f73005b3cb 100644
--- a/activerecord/test/cases/associations/has_and_belongs_to_many_associations_test.rb
+++ b/activerecord/test/cases/associations/has_and_belongs_to_many_associations_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/developer"
require "models/computer"
diff --git a/activerecord/test/cases/associations/has_many_associations_test.rb b/activerecord/test/cases/associations/has_many_associations_test.rb
index 5ad1e2aecc..a7e16af88d 100644
--- a/activerecord/test/cases/associations/has_many_associations_test.rb
+++ b/activerecord/test/cases/associations/has_many_associations_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/developer"
require "models/computer"
diff --git a/activerecord/test/cases/associations/has_many_through_associations_test.rb b/activerecord/test/cases/associations/has_many_through_associations_test.rb
index 6794428688..1c2138a3d0 100644
--- a/activerecord/test/cases/associations/has_many_through_associations_test.rb
+++ b/activerecord/test/cases/associations/has_many_through_associations_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/post"
require "models/person"
diff --git a/activerecord/test/cases/associations/has_one_associations_test.rb b/activerecord/test/cases/associations/has_one_associations_test.rb
index 545eec7e5d..bf3b8dcd63 100644
--- a/activerecord/test/cases/associations/has_one_associations_test.rb
+++ b/activerecord/test/cases/associations/has_one_associations_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/developer"
require "models/computer"
diff --git a/activerecord/test/cases/associations/has_one_through_associations_test.rb b/activerecord/test/cases/associations/has_one_through_associations_test.rb
index 0a74a9e710..28b883586d 100644
--- a/activerecord/test/cases/associations/has_one_through_associations_test.rb
+++ b/activerecord/test/cases/associations/has_one_through_associations_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/club"
require "models/member_type"
diff --git a/activerecord/test/cases/associations/inner_join_association_test.rb b/activerecord/test/cases/associations/inner_join_association_test.rb
index 6fff4171c8..ddf5bc6f0b 100644
--- a/activerecord/test/cases/associations/inner_join_association_test.rb
+++ b/activerecord/test/cases/associations/inner_join_association_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/post"
require "models/comment"
diff --git a/activerecord/test/cases/associations/inverse_associations_test.rb b/activerecord/test/cases/associations/inverse_associations_test.rb
index 95ba6bdf8a..8e3087e7ca 100644
--- a/activerecord/test/cases/associations/inverse_associations_test.rb
+++ b/activerecord/test/cases/associations/inverse_associations_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/man"
require "models/face"
diff --git a/activerecord/test/cases/associations/join_model_test.rb b/activerecord/test/cases/associations/join_model_test.rb
index c2758b30a1..c078cef064 100644
--- a/activerecord/test/cases/associations/join_model_test.rb
+++ b/activerecord/test/cases/associations/join_model_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/tag"
require "models/tagging"
diff --git a/activerecord/test/cases/associations/left_outer_join_association_test.rb b/activerecord/test/cases/associations/left_outer_join_association_test.rb
index 68c9286972..6d3757f467 100644
--- a/activerecord/test/cases/associations/left_outer_join_association_test.rb
+++ b/activerecord/test/cases/associations/left_outer_join_association_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/post"
require "models/comment"
diff --git a/activerecord/test/cases/associations/nested_through_associations_test.rb b/activerecord/test/cases/associations/nested_through_associations_test.rb
index 90b2d4bc07..67ff7355b3 100644
--- a/activerecord/test/cases/associations/nested_through_associations_test.rb
+++ b/activerecord/test/cases/associations/nested_through_associations_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/author"
require "models/post"
diff --git a/activerecord/test/cases/associations/required_test.rb b/activerecord/test/cases/associations/required_test.rb
index 6cf2d8ac12..45e1803858 100644
--- a/activerecord/test/cases/associations/required_test.rb
+++ b/activerecord/test/cases/associations/required_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
class RequiredAssociationsTest < ActiveRecord::TestCase
diff --git a/activerecord/test/cases/associations_test.rb b/activerecord/test/cases/associations_test.rb
index ba2f4c11c8..2eb31326a5 100644
--- a/activerecord/test/cases/associations_test.rb
+++ b/activerecord/test/cases/associations_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/computer"
require "models/developer"
diff --git a/activerecord/test/cases/attribute_decorators_test.rb b/activerecord/test/cases/attribute_decorators_test.rb
index eb8efab6a5..cfa6ed1da6 100644
--- a/activerecord/test/cases/attribute_decorators_test.rb
+++ b/activerecord/test/cases/attribute_decorators_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
module ActiveRecord
diff --git a/activerecord/test/cases/attribute_methods/read_test.rb b/activerecord/test/cases/attribute_methods/read_test.rb
index a366144e17..1fc63a49d4 100644
--- a/activerecord/test/cases/attribute_methods/read_test.rb
+++ b/activerecord/test/cases/attribute_methods/read_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
module ActiveRecord
diff --git a/activerecord/test/cases/attribute_methods_test.rb b/activerecord/test/cases/attribute_methods_test.rb
index 1f3a3652d7..4d24a980dc 100644
--- a/activerecord/test/cases/attribute_methods_test.rb
+++ b/activerecord/test/cases/attribute_methods_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/minimalistic"
require "models/developer"
diff --git a/activerecord/test/cases/attribute_set_test.rb b/activerecord/test/cases/attribute_set_test.rb
index 80c67f171b..bd4b200735 100644
--- a/activerecord/test/cases/attribute_set_test.rb
+++ b/activerecord/test/cases/attribute_set_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
module ActiveRecord
diff --git a/activerecord/test/cases/attribute_test.rb b/activerecord/test/cases/attribute_test.rb
index ed9fb1b57b..e856d551c0 100644
--- a/activerecord/test/cases/attribute_test.rb
+++ b/activerecord/test/cases/attribute_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
module ActiveRecord
diff --git a/activerecord/test/cases/attributes_test.rb b/activerecord/test/cases/attributes_test.rb
index 8aa515fe6e..3705a6be89 100644
--- a/activerecord/test/cases/attributes_test.rb
+++ b/activerecord/test/cases/attributes_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
class OverloadedType < ActiveRecord::Base
diff --git a/activerecord/test/cases/autosave_association_test.rb b/activerecord/test/cases/autosave_association_test.rb
index db2a19ea62..2203aa1788 100644
--- a/activerecord/test/cases/autosave_association_test.rb
+++ b/activerecord/test/cases/autosave_association_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/bird"
require "models/post"
diff --git a/activerecord/test/cases/base_test.rb b/activerecord/test/cases/base_test.rb
index a26a4bbb61..dc32e995a4 100644
--- a/activerecord/test/cases/base_test.rb
+++ b/activerecord/test/cases/base_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/post"
require "models/author"
diff --git a/activerecord/test/cases/batches_test.rb b/activerecord/test/cases/batches_test.rb
index beae679542..1a66b82b2e 100644
--- a/activerecord/test/cases/batches_test.rb
+++ b/activerecord/test/cases/batches_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/post"
require "models/subscriber"
diff --git a/activerecord/test/cases/binary_test.rb b/activerecord/test/cases/binary_test.rb
index 89301563f9..f6ac7990d1 100644
--- a/activerecord/test/cases/binary_test.rb
+++ b/activerecord/test/cases/binary_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
# Without using prepared statements, it makes no sense to test
diff --git a/activerecord/test/cases/bind_parameter_test.rb b/activerecord/test/cases/bind_parameter_test.rb
index 8504f586cc..5af44c27eb 100644
--- a/activerecord/test/cases/bind_parameter_test.rb
+++ b/activerecord/test/cases/bind_parameter_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/topic"
require "models/author"
diff --git a/activerecord/test/cases/cache_key_test.rb b/activerecord/test/cases/cache_key_test.rb
index f0a1bb9e22..7b8264e6e8 100644
--- a/activerecord/test/cases/cache_key_test.rb
+++ b/activerecord/test/cases/cache_key_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
module ActiveRecord
diff --git a/activerecord/test/cases/calculations_test.rb b/activerecord/test/cases/calculations_test.rb
index 478b9fe742..80baaac30a 100644
--- a/activerecord/test/cases/calculations_test.rb
+++ b/activerecord/test/cases/calculations_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/book"
require "models/club"
diff --git a/activerecord/test/cases/callbacks_test.rb b/activerecord/test/cases/callbacks_test.rb
index 55deaa6947..b3c86586d0 100644
--- a/activerecord/test/cases/callbacks_test.rb
+++ b/activerecord/test/cases/callbacks_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/developer"
require "models/computer"
diff --git a/activerecord/test/cases/clone_test.rb b/activerecord/test/cases/clone_test.rb
index fa0f53676e..b89294c094 100644
--- a/activerecord/test/cases/clone_test.rb
+++ b/activerecord/test/cases/clone_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/topic"
diff --git a/activerecord/test/cases/coders/json_test.rb b/activerecord/test/cases/coders/json_test.rb
index 95e6fb3e7b..d22d93d129 100644
--- a/activerecord/test/cases/coders/json_test.rb
+++ b/activerecord/test/cases/coders/json_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
module ActiveRecord
diff --git a/activerecord/test/cases/coders/yaml_column_test.rb b/activerecord/test/cases/coders/yaml_column_test.rb
index e3e85a58a4..a26a72712d 100644
--- a/activerecord/test/cases/coders/yaml_column_test.rb
+++ b/activerecord/test/cases/coders/yaml_column_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
module ActiveRecord
diff --git a/activerecord/test/cases/collection_cache_key_test.rb b/activerecord/test/cases/collection_cache_key_test.rb
index 2d10a68416..f344c77691 100644
--- a/activerecord/test/cases/collection_cache_key_test.rb
+++ b/activerecord/test/cases/collection_cache_key_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/computer"
require "models/developer"
diff --git a/activerecord/test/cases/column_alias_test.rb b/activerecord/test/cases/column_alias_test.rb
index 506ae05756..9893ba9580 100644
--- a/activerecord/test/cases/column_alias_test.rb
+++ b/activerecord/test/cases/column_alias_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/topic"
diff --git a/activerecord/test/cases/column_definition_test.rb b/activerecord/test/cases/column_definition_test.rb
index fcb0952c1c..90c8d21c43 100644
--- a/activerecord/test/cases/column_definition_test.rb
+++ b/activerecord/test/cases/column_definition_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
module ActiveRecord
diff --git a/activerecord/test/cases/comment_test.rb b/activerecord/test/cases/comment_test.rb
index 5c91ac347c..c23be52a6c 100644
--- a/activerecord/test/cases/comment_test.rb
+++ b/activerecord/test/cases/comment_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "support/schema_dumping_helper"
diff --git a/activerecord/test/cases/connection_adapters/adapter_leasing_test.rb b/activerecord/test/cases/connection_adapters/adapter_leasing_test.rb
index 4f88b129af..64189381cb 100644
--- a/activerecord/test/cases/connection_adapters/adapter_leasing_test.rb
+++ b/activerecord/test/cases/connection_adapters/adapter_leasing_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
module ActiveRecord
diff --git a/activerecord/test/cases/connection_adapters/connection_handler_test.rb b/activerecord/test/cases/connection_adapters/connection_handler_test.rb
index f8725ddb01..2a71f08d90 100644
--- a/activerecord/test/cases/connection_adapters/connection_handler_test.rb
+++ b/activerecord/test/cases/connection_adapters/connection_handler_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
module ActiveRecord
diff --git a/activerecord/test/cases/connection_adapters/connection_specification_test.rb b/activerecord/test/cases/connection_adapters/connection_specification_test.rb
index 40998c06bf..10a3521c79 100644
--- a/activerecord/test/cases/connection_adapters/connection_specification_test.rb
+++ b/activerecord/test/cases/connection_adapters/connection_specification_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
module ActiveRecord
diff --git a/activerecord/test/cases/connection_adapters/merge_and_resolve_default_url_config_test.rb b/activerecord/test/cases/connection_adapters/merge_and_resolve_default_url_config_test.rb
index 7c98c80e39..8faa67255d 100644
--- a/activerecord/test/cases/connection_adapters/merge_and_resolve_default_url_config_test.rb
+++ b/activerecord/test/cases/connection_adapters/merge_and_resolve_default_url_config_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
module ActiveRecord
diff --git a/activerecord/test/cases/connection_adapters/mysql_type_lookup_test.rb b/activerecord/test/cases/connection_adapters/mysql_type_lookup_test.rb
index 133632bac9..3657b8340d 100644
--- a/activerecord/test/cases/connection_adapters/mysql_type_lookup_test.rb
+++ b/activerecord/test/cases/connection_adapters/mysql_type_lookup_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
if current_adapter?(:Mysql2Adapter)
diff --git a/activerecord/test/cases/connection_adapters/schema_cache_test.rb b/activerecord/test/cases/connection_adapters/schema_cache_test.rb
index 3370818616..106323ccc9 100644
--- a/activerecord/test/cases/connection_adapters/schema_cache_test.rb
+++ b/activerecord/test/cases/connection_adapters/schema_cache_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
module ActiveRecord
diff --git a/activerecord/test/cases/connection_adapters/type_lookup_test.rb b/activerecord/test/cases/connection_adapters/type_lookup_test.rb
index 251483da44..a348c2d783 100644
--- a/activerecord/test/cases/connection_adapters/type_lookup_test.rb
+++ b/activerecord/test/cases/connection_adapters/type_lookup_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
unless current_adapter?(:PostgreSQLAdapter) # PostgreSQL does not use type strings for lookup
diff --git a/activerecord/test/cases/connection_management_test.rb b/activerecord/test/cases/connection_management_test.rb
index 9bd0aab981..d1e946d401 100644
--- a/activerecord/test/cases/connection_management_test.rb
+++ b/activerecord/test/cases/connection_management_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "rack"
diff --git a/activerecord/test/cases/connection_pool_test.rb b/activerecord/test/cases/connection_pool_test.rb
index adbd158e7a..00a0187b57 100644
--- a/activerecord/test/cases/connection_pool_test.rb
+++ b/activerecord/test/cases/connection_pool_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "concurrent/atomic/count_down_latch"
diff --git a/activerecord/test/cases/connection_specification/resolver_test.rb b/activerecord/test/cases/connection_specification/resolver_test.rb
index 3d97281627..13b5bae13c 100644
--- a/activerecord/test/cases/connection_specification/resolver_test.rb
+++ b/activerecord/test/cases/connection_specification/resolver_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
module ActiveRecord
diff --git a/activerecord/test/cases/core_test.rb b/activerecord/test/cases/core_test.rb
index 5cf962c39d..936f26ce04 100644
--- a/activerecord/test/cases/core_test.rb
+++ b/activerecord/test/cases/core_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/person"
require "models/topic"
diff --git a/activerecord/test/cases/counter_cache_test.rb b/activerecord/test/cases/counter_cache_test.rb
index 14800e6b91..46d7526cc0 100644
--- a/activerecord/test/cases/counter_cache_test.rb
+++ b/activerecord/test/cases/counter_cache_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/topic"
require "models/car"
diff --git a/activerecord/test/cases/custom_locking_test.rb b/activerecord/test/cases/custom_locking_test.rb
index e170843952..15c8b684e4 100644
--- a/activerecord/test/cases/custom_locking_test.rb
+++ b/activerecord/test/cases/custom_locking_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/person"
diff --git a/activerecord/test/cases/database_statements_test.rb b/activerecord/test/cases/database_statements_test.rb
index 5df028d397..66035865be 100644
--- a/activerecord/test/cases/database_statements_test.rb
+++ b/activerecord/test/cases/database_statements_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
class DatabaseStatementsTest < ActiveRecord::TestCase
diff --git a/activerecord/test/cases/date_test.rb b/activerecord/test/cases/date_test.rb
index 202100ff69..2edc0415cd 100644
--- a/activerecord/test/cases/date_test.rb
+++ b/activerecord/test/cases/date_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/topic"
diff --git a/activerecord/test/cases/date_time_precision_test.rb b/activerecord/test/cases/date_time_precision_test.rb
index 12b1858991..e4a2f9ee17 100644
--- a/activerecord/test/cases/date_time_precision_test.rb
+++ b/activerecord/test/cases/date_time_precision_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "support/schema_dumping_helper"
diff --git a/activerecord/test/cases/date_time_test.rb b/activerecord/test/cases/date_time_test.rb
index 8753c95641..ad7da9de70 100644
--- a/activerecord/test/cases/date_time_test.rb
+++ b/activerecord/test/cases/date_time_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/topic"
require "models/task"
diff --git a/activerecord/test/cases/defaults_test.rb b/activerecord/test/cases/defaults_test.rb
index 30cfa0744f..996d298689 100644
--- a/activerecord/test/cases/defaults_test.rb
+++ b/activerecord/test/cases/defaults_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "support/schema_dumping_helper"
require "models/default"
diff --git a/activerecord/test/cases/dirty_test.rb b/activerecord/test/cases/dirty_test.rb
index cc2724502b..f72e0d2ead 100644
--- a/activerecord/test/cases/dirty_test.rb
+++ b/activerecord/test/cases/dirty_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/topic" # For booleans
require "models/pirate" # For timestamps
diff --git a/activerecord/test/cases/disconnected_test.rb b/activerecord/test/cases/disconnected_test.rb
index 92365351b1..c25089a420 100644
--- a/activerecord/test/cases/disconnected_test.rb
+++ b/activerecord/test/cases/disconnected_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
class TestRecord < ActiveRecord::Base
diff --git a/activerecord/test/cases/dup_test.rb b/activerecord/test/cases/dup_test.rb
index 76979dc798..000ed27efb 100644
--- a/activerecord/test/cases/dup_test.rb
+++ b/activerecord/test/cases/dup_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/reply"
require "models/topic"
diff --git a/activerecord/test/cases/enum_test.rb b/activerecord/test/cases/enum_test.rb
index 8e13582f3e..4ef9a125e6 100644
--- a/activerecord/test/cases/enum_test.rb
+++ b/activerecord/test/cases/enum_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/author"
require "models/book"
diff --git a/activerecord/test/cases/errors_test.rb b/activerecord/test/cases/errors_test.rb
index 45e28c4f03..e90669e0c7 100644
--- a/activerecord/test/cases/errors_test.rb
+++ b/activerecord/test/cases/errors_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
class ErrorsTest < ActiveRecord::TestCase
diff --git a/activerecord/test/cases/explain_subscriber_test.rb b/activerecord/test/cases/explain_subscriber_test.rb
index 0fb6bf2eed..ca87e04012 100644
--- a/activerecord/test/cases/explain_subscriber_test.rb
+++ b/activerecord/test/cases/explain_subscriber_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "active_record/explain_subscriber"
require "active_record/explain_registry"
diff --git a/activerecord/test/cases/explain_test.rb b/activerecord/test/cases/explain_test.rb
index de3ec36667..4f6bd9327c 100644
--- a/activerecord/test/cases/explain_test.rb
+++ b/activerecord/test/cases/explain_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/car"
require "active_support/core_ext/string/strip"
diff --git a/activerecord/test/cases/finder_respond_to_test.rb b/activerecord/test/cases/finder_respond_to_test.rb
index 29d7dee343..3eaa993d45 100644
--- a/activerecord/test/cases/finder_respond_to_test.rb
+++ b/activerecord/test/cases/finder_respond_to_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/topic"
diff --git a/activerecord/test/cases/finder_test.rb b/activerecord/test/cases/finder_test.rb
index 752ac519a4..420f552ef6 100644
--- a/activerecord/test/cases/finder_test.rb
+++ b/activerecord/test/cases/finder_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/post"
require "models/author"
diff --git a/activerecord/test/cases/fixture_set/file_test.rb b/activerecord/test/cases/fixture_set/file_test.rb
index c7058133b2..533edcc2e0 100644
--- a/activerecord/test/cases/fixture_set/file_test.rb
+++ b/activerecord/test/cases/fixture_set/file_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "tempfile"
diff --git a/activerecord/test/cases/fixtures_test.rb b/activerecord/test/cases/fixtures_test.rb
index 91d0908450..b499e60922 100644
--- a/activerecord/test/cases/fixtures_test.rb
+++ b/activerecord/test/cases/fixtures_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/admin"
require "models/admin/account"
diff --git a/activerecord/test/cases/forbidden_attributes_protection_test.rb b/activerecord/test/cases/forbidden_attributes_protection_test.rb
index d11ec08dea..ffa3f63e0d 100644
--- a/activerecord/test/cases/forbidden_attributes_protection_test.rb
+++ b/activerecord/test/cases/forbidden_attributes_protection_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "active_support/core_ext/hash/indifferent_access"
diff --git a/activerecord/test/cases/habtm_destroy_order_test.rb b/activerecord/test/cases/habtm_destroy_order_test.rb
index 124e3216d0..365d4576dd 100644
--- a/activerecord/test/cases/habtm_destroy_order_test.rb
+++ b/activerecord/test/cases/habtm_destroy_order_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/lesson"
require "models/student"
diff --git a/activerecord/test/cases/helper.rb b/activerecord/test/cases/helper.rb
index 84a784e6d5..5a3b8e3fb5 100644
--- a/activerecord/test/cases/helper.rb
+++ b/activerecord/test/cases/helper.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "config"
require "stringio"
diff --git a/activerecord/test/cases/hot_compatibility_test.rb b/activerecord/test/cases/hot_compatibility_test.rb
index 970ccc3601..e107ff2362 100644
--- a/activerecord/test/cases/hot_compatibility_test.rb
+++ b/activerecord/test/cases/hot_compatibility_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "support/connection_helper"
diff --git a/activerecord/test/cases/i18n_test.rb b/activerecord/test/cases/i18n_test.rb
index 94b5e4ef2f..7f03c5b23d 100644
--- a/activerecord/test/cases/i18n_test.rb
+++ b/activerecord/test/cases/i18n_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/topic"
require "models/reply"
diff --git a/activerecord/test/cases/inheritance_test.rb b/activerecord/test/cases/inheritance_test.rb
index e73d9d0a27..fb5a7bcc31 100644
--- a/activerecord/test/cases/inheritance_test.rb
+++ b/activerecord/test/cases/inheritance_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/author"
require "models/company"
diff --git a/activerecord/test/cases/integration_test.rb b/activerecord/test/cases/integration_test.rb
index 1075366fb1..9104976126 100644
--- a/activerecord/test/cases/integration_test.rb
+++ b/activerecord/test/cases/integration_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/company"
require "models/developer"
diff --git a/activerecord/test/cases/invalid_connection_test.rb b/activerecord/test/cases/invalid_connection_test.rb
index 256ad59407..1367af2859 100644
--- a/activerecord/test/cases/invalid_connection_test.rb
+++ b/activerecord/test/cases/invalid_connection_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
if current_adapter?(:Mysql2Adapter)
diff --git a/activerecord/test/cases/invertible_migration_test.rb b/activerecord/test/cases/invertible_migration_test.rb
index a44a351209..cc3951e2ba 100644
--- a/activerecord/test/cases/invertible_migration_test.rb
+++ b/activerecord/test/cases/invertible_migration_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
class Horse < ActiveRecord::Base
diff --git a/activerecord/test/cases/json_attribute_test.rb b/activerecord/test/cases/json_attribute_test.rb
index c64e2c31de..e5848b45f8 100644
--- a/activerecord/test/cases/json_attribute_test.rb
+++ b/activerecord/test/cases/json_attribute_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "cases/json_shared_test_cases"
diff --git a/activerecord/test/cases/json_serialization_test.rb b/activerecord/test/cases/json_serialization_test.rb
index 2ca95fe3b4..9b4b61b16e 100644
--- a/activerecord/test/cases/json_serialization_test.rb
+++ b/activerecord/test/cases/json_serialization_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/contact"
require "models/post"
diff --git a/activerecord/test/cases/json_shared_test_cases.rb b/activerecord/test/cases/json_shared_test_cases.rb
index 1eeefb78dd..9a1c1c3f3f 100644
--- a/activerecord/test/cases/json_shared_test_cases.rb
+++ b/activerecord/test/cases/json_shared_test_cases.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "support/schema_dumping_helper"
module JSONSharedTestCases
diff --git a/activerecord/test/cases/locking_test.rb b/activerecord/test/cases/locking_test.rb
index e67ec22c42..2fc52393f2 100644
--- a/activerecord/test/cases/locking_test.rb
+++ b/activerecord/test/cases/locking_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "thread"
require "cases/helper"
require "models/person"
diff --git a/activerecord/test/cases/log_subscriber_test.rb b/activerecord/test/cases/log_subscriber_test.rb
index 0eaca0d001..b80257962c 100644
--- a/activerecord/test/cases/log_subscriber_test.rb
+++ b/activerecord/test/cases/log_subscriber_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/binary"
require "models/developer"
diff --git a/activerecord/test/cases/migration/change_schema_test.rb b/activerecord/test/cases/migration/change_schema_test.rb
index e706fc4f08..1d305fa11f 100644
--- a/activerecord/test/cases/migration/change_schema_test.rb
+++ b/activerecord/test/cases/migration/change_schema_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
module ActiveRecord
diff --git a/activerecord/test/cases/migration/change_table_test.rb b/activerecord/test/cases/migration/change_table_test.rb
index f1ca91887b..ec817a579b 100644
--- a/activerecord/test/cases/migration/change_table_test.rb
+++ b/activerecord/test/cases/migration/change_table_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/migration/helper"
module ActiveRecord
diff --git a/activerecord/test/cases/migration/column_attributes_test.rb b/activerecord/test/cases/migration/column_attributes_test.rb
index 5ef0847a64..48df931543 100644
--- a/activerecord/test/cases/migration/column_attributes_test.rb
+++ b/activerecord/test/cases/migration/column_attributes_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/migration/helper"
module ActiveRecord
diff --git a/activerecord/test/cases/migration/column_positioning_test.rb b/activerecord/test/cases/migration/column_positioning_test.rb
index bdbad431e8..f2162d91b1 100644
--- a/activerecord/test/cases/migration/column_positioning_test.rb
+++ b/activerecord/test/cases/migration/column_positioning_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
module ActiveRecord
diff --git a/activerecord/test/cases/migration/columns_test.rb b/activerecord/test/cases/migration/columns_test.rb
index c4751277f7..2329888345 100644
--- a/activerecord/test/cases/migration/columns_test.rb
+++ b/activerecord/test/cases/migration/columns_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/migration/helper"
module ActiveRecord
diff --git a/activerecord/test/cases/migration/command_recorder_test.rb b/activerecord/test/cases/migration/command_recorder_test.rb
index be200a7225..007926f1b9 100644
--- a/activerecord/test/cases/migration/command_recorder_test.rb
+++ b/activerecord/test/cases/migration/command_recorder_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
module ActiveRecord
diff --git a/activerecord/test/cases/migration/compatibility_test.rb b/activerecord/test/cases/migration/compatibility_test.rb
index 4321f967d2..596a21dcbc 100644
--- a/activerecord/test/cases/migration/compatibility_test.rb
+++ b/activerecord/test/cases/migration/compatibility_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "support/schema_dumping_helper"
diff --git a/activerecord/test/cases/migration/create_join_table_test.rb b/activerecord/test/cases/migration/create_join_table_test.rb
index 0e9e880fe1..c4896f3d6e 100644
--- a/activerecord/test/cases/migration/create_join_table_test.rb
+++ b/activerecord/test/cases/migration/create_join_table_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
module ActiveRecord
diff --git a/activerecord/test/cases/migration/foreign_key_test.rb b/activerecord/test/cases/migration/foreign_key_test.rb
index 7a44b2db75..7762d37915 100644
--- a/activerecord/test/cases/migration/foreign_key_test.rb
+++ b/activerecord/test/cases/migration/foreign_key_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "support/schema_dumping_helper"
diff --git a/activerecord/test/cases/migration/helper.rb b/activerecord/test/cases/migration/helper.rb
index e366ed92b1..9c0fa7339d 100644
--- a/activerecord/test/cases/migration/helper.rb
+++ b/activerecord/test/cases/migration/helper.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
module ActiveRecord
diff --git a/activerecord/test/cases/migration/index_test.rb b/activerecord/test/cases/migration/index_test.rb
index ccc0f4948f..f10fcf1398 100644
--- a/activerecord/test/cases/migration/index_test.rb
+++ b/activerecord/test/cases/migration/index_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
module ActiveRecord
diff --git a/activerecord/test/cases/migration/logger_test.rb b/activerecord/test/cases/migration/logger_test.rb
index 9fe64b73a8..3d7c7ad469 100644
--- a/activerecord/test/cases/migration/logger_test.rb
+++ b/activerecord/test/cases/migration/logger_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
module ActiveRecord
diff --git a/activerecord/test/cases/migration/pending_migrations_test.rb b/activerecord/test/cases/migration/pending_migrations_test.rb
index 0cb4b6cfa1..6970fdcc87 100644
--- a/activerecord/test/cases/migration/pending_migrations_test.rb
+++ b/activerecord/test/cases/migration/pending_migrations_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
module ActiveRecord
diff --git a/activerecord/test/cases/migration/references_foreign_key_test.rb b/activerecord/test/cases/migration/references_foreign_key_test.rb
index 405fd7aaed..718b9a0613 100644
--- a/activerecord/test/cases/migration/references_foreign_key_test.rb
+++ b/activerecord/test/cases/migration/references_foreign_key_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
if ActiveRecord::Base.connection.supports_foreign_keys_in_create?
diff --git a/activerecord/test/cases/migration/references_index_test.rb b/activerecord/test/cases/migration/references_index_test.rb
index 2954f1e275..2866cabab6 100644
--- a/activerecord/test/cases/migration/references_index_test.rb
+++ b/activerecord/test/cases/migration/references_index_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
module ActiveRecord
diff --git a/activerecord/test/cases/migration/references_statements_test.rb b/activerecord/test/cases/migration/references_statements_test.rb
index f8b373bdee..e9eb9968cb 100644
--- a/activerecord/test/cases/migration/references_statements_test.rb
+++ b/activerecord/test/cases/migration/references_statements_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/migration/helper"
module ActiveRecord
diff --git a/activerecord/test/cases/migration/rename_table_test.rb b/activerecord/test/cases/migration/rename_table_test.rb
index bee528ca8a..5da3ad33a3 100644
--- a/activerecord/test/cases/migration/rename_table_test.rb
+++ b/activerecord/test/cases/migration/rename_table_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/migration/helper"
module ActiveRecord
diff --git a/activerecord/test/cases/migration_test.rb b/activerecord/test/cases/migration_test.rb
index 315e58668a..3a49a41580 100644
--- a/activerecord/test/cases/migration_test.rb
+++ b/activerecord/test/cases/migration_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "cases/migration/helper"
require "bigdecimal/util"
diff --git a/activerecord/test/cases/migrator_test.rb b/activerecord/test/cases/migrator_test.rb
index b93643922d..2e4b454a86 100644
--- a/activerecord/test/cases/migrator_test.rb
+++ b/activerecord/test/cases/migrator_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "cases/migration/helper"
diff --git a/activerecord/test/cases/mixin_test.rb b/activerecord/test/cases/mixin_test.rb
index 82190c283e..a8af8e30f7 100644
--- a/activerecord/test/cases/mixin_test.rb
+++ b/activerecord/test/cases/mixin_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
class Mixin < ActiveRecord::Base
diff --git a/activerecord/test/cases/modules_test.rb b/activerecord/test/cases/modules_test.rb
index 514911cb13..f8a7bab35f 100644
--- a/activerecord/test/cases/modules_test.rb
+++ b/activerecord/test/cases/modules_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/company_in_module"
require "models/shop"
diff --git a/activerecord/test/cases/multiparameter_attributes_test.rb b/activerecord/test/cases/multiparameter_attributes_test.rb
index 7a35b5dc84..ceb5724377 100644
--- a/activerecord/test/cases/multiparameter_attributes_test.rb
+++ b/activerecord/test/cases/multiparameter_attributes_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/topic"
require "models/customer"
diff --git a/activerecord/test/cases/multiple_db_test.rb b/activerecord/test/cases/multiple_db_test.rb
index bfa5da765b..e3bb51bd77 100644
--- a/activerecord/test/cases/multiple_db_test.rb
+++ b/activerecord/test/cases/multiple_db_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/entrant"
require "models/bird"
diff --git a/activerecord/test/cases/nested_attributes_test.rb b/activerecord/test/cases/nested_attributes_test.rb
index aea65a7baf..154faa56aa 100644
--- a/activerecord/test/cases/nested_attributes_test.rb
+++ b/activerecord/test/cases/nested_attributes_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/pirate"
require "models/ship"
diff --git a/activerecord/test/cases/nested_attributes_with_callbacks_test.rb b/activerecord/test/cases/nested_attributes_with_callbacks_test.rb
index 905ddef063..b9d2acbed2 100644
--- a/activerecord/test/cases/nested_attributes_with_callbacks_test.rb
+++ b/activerecord/test/cases/nested_attributes_with_callbacks_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/pirate"
require "models/bird"
diff --git a/activerecord/test/cases/numeric_data_test.rb b/activerecord/test/cases/numeric_data_test.rb
index b0a3d566bb..76b97033af 100644
--- a/activerecord/test/cases/numeric_data_test.rb
+++ b/activerecord/test/cases/numeric_data_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/numeric_data"
diff --git a/activerecord/test/cases/persistence_test.rb b/activerecord/test/cases/persistence_test.rb
index 8f0099ee48..5895c51714 100644
--- a/activerecord/test/cases/persistence_test.rb
+++ b/activerecord/test/cases/persistence_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/aircraft"
require "models/post"
diff --git a/activerecord/test/cases/pooled_connections_test.rb b/activerecord/test/cases/pooled_connections_test.rb
index d99318f1aa..f1b0d08765 100644
--- a/activerecord/test/cases/pooled_connections_test.rb
+++ b/activerecord/test/cases/pooled_connections_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/project"
require "timeout"
diff --git a/activerecord/test/cases/primary_keys_test.rb b/activerecord/test/cases/primary_keys_test.rb
index 61cd6b45a1..56229b70bc 100644
--- a/activerecord/test/cases/primary_keys_test.rb
+++ b/activerecord/test/cases/primary_keys_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "support/schema_dumping_helper"
require "models/topic"
diff --git a/activerecord/test/cases/query_cache_test.rb b/activerecord/test/cases/query_cache_test.rb
index fb5305d288..b018a7b6c0 100644
--- a/activerecord/test/cases/query_cache_test.rb
+++ b/activerecord/test/cases/query_cache_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/topic"
require "models/task"
diff --git a/activerecord/test/cases/quoting_test.rb b/activerecord/test/cases/quoting_test.rb
index 4cfad9c21f..0819776fbf 100644
--- a/activerecord/test/cases/quoting_test.rb
+++ b/activerecord/test/cases/quoting_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
module ActiveRecord
diff --git a/activerecord/test/cases/readonly_test.rb b/activerecord/test/cases/readonly_test.rb
index 2e8d108985..24b678310d 100644
--- a/activerecord/test/cases/readonly_test.rb
+++ b/activerecord/test/cases/readonly_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/author"
require "models/post"
diff --git a/activerecord/test/cases/reaper_test.rb b/activerecord/test/cases/reaper_test.rb
index 153311bece..249878b67d 100644
--- a/activerecord/test/cases/reaper_test.rb
+++ b/activerecord/test/cases/reaper_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
module ActiveRecord
diff --git a/activerecord/test/cases/reflection_test.rb b/activerecord/test/cases/reflection_test.rb
index e27000472c..c1c2efb9c8 100644
--- a/activerecord/test/cases/reflection_test.rb
+++ b/activerecord/test/cases/reflection_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/topic"
require "models/customer"
diff --git a/activerecord/test/cases/relation/delegation_test.rb b/activerecord/test/cases/relation/delegation_test.rb
index 5945eab75a..3b15f051b2 100644
--- a/activerecord/test/cases/relation/delegation_test.rb
+++ b/activerecord/test/cases/relation/delegation_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/post"
require "models/comment"
diff --git a/activerecord/test/cases/relation/merging_test.rb b/activerecord/test/cases/relation/merging_test.rb
index feb5604284..3901824aac 100644
--- a/activerecord/test/cases/relation/merging_test.rb
+++ b/activerecord/test/cases/relation/merging_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/author"
require "models/comment"
diff --git a/activerecord/test/cases/relation/mutation_test.rb b/activerecord/test/cases/relation/mutation_test.rb
index 113ddaa780..dea787c07f 100644
--- a/activerecord/test/cases/relation/mutation_test.rb
+++ b/activerecord/test/cases/relation/mutation_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/post"
diff --git a/activerecord/test/cases/relation/or_test.rb b/activerecord/test/cases/relation/or_test.rb
index 541feabeb6..61b6601580 100644
--- a/activerecord/test/cases/relation/or_test.rb
+++ b/activerecord/test/cases/relation/or_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/post"
diff --git a/activerecord/test/cases/relation/predicate_builder_test.rb b/activerecord/test/cases/relation/predicate_builder_test.rb
index 94cd704a14..48758dc148 100644
--- a/activerecord/test/cases/relation/predicate_builder_test.rb
+++ b/activerecord/test/cases/relation/predicate_builder_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/topic"
diff --git a/activerecord/test/cases/relation/record_fetch_warning_test.rb b/activerecord/test/cases/relation/record_fetch_warning_test.rb
index 59eb524f5a..62ca051431 100644
--- a/activerecord/test/cases/relation/record_fetch_warning_test.rb
+++ b/activerecord/test/cases/relation/record_fetch_warning_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/post"
require "active_record/relation/record_fetch_warning"
diff --git a/activerecord/test/cases/relation/where_chain_test.rb b/activerecord/test/cases/relation/where_chain_test.rb
index 351e955947..86e150ed79 100644
--- a/activerecord/test/cases/relation/where_chain_test.rb
+++ b/activerecord/test/cases/relation/where_chain_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/post"
require "models/comment"
diff --git a/activerecord/test/cases/relation/where_clause_test.rb b/activerecord/test/cases/relation/where_clause_test.rb
index 59a7002774..f8eb0dee91 100644
--- a/activerecord/test/cases/relation/where_clause_test.rb
+++ b/activerecord/test/cases/relation/where_clause_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
class ActiveRecord::Relation
diff --git a/activerecord/test/cases/relation/where_test.rb b/activerecord/test/cases/relation/where_test.rb
index ac4fcfff1d..42dae4d569 100644
--- a/activerecord/test/cases/relation/where_test.rb
+++ b/activerecord/test/cases/relation/where_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/author"
require "models/binary"
diff --git a/activerecord/test/cases/relation_test.rb b/activerecord/test/cases/relation_test.rb
index f81b155657..a403824f1a 100644
--- a/activerecord/test/cases/relation_test.rb
+++ b/activerecord/test/cases/relation_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/post"
require "models/comment"
diff --git a/activerecord/test/cases/relations_test.rb b/activerecord/test/cases/relations_test.rb
index c804bbf3a5..5767dec315 100644
--- a/activerecord/test/cases/relations_test.rb
+++ b/activerecord/test/cases/relations_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/tag"
require "models/tagging"
diff --git a/activerecord/test/cases/reload_models_test.rb b/activerecord/test/cases/reload_models_test.rb
index 6c2f9fb5ab..3f4c0c03e3 100644
--- a/activerecord/test/cases/reload_models_test.rb
+++ b/activerecord/test/cases/reload_models_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/owner"
require "models/pet"
diff --git a/activerecord/test/cases/reserved_word_test.rb b/activerecord/test/cases/reserved_word_test.rb
index 44f7a28215..f3019a5326 100644
--- a/activerecord/test/cases/reserved_word_test.rb
+++ b/activerecord/test/cases/reserved_word_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
class ReservedWordTest < ActiveRecord::TestCase
diff --git a/activerecord/test/cases/result_test.rb b/activerecord/test/cases/result_test.rb
index b4044acd57..1a0b7c6ca7 100644
--- a/activerecord/test/cases/result_test.rb
+++ b/activerecord/test/cases/result_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
module ActiveRecord
diff --git a/activerecord/test/cases/sanitize_test.rb b/activerecord/test/cases/sanitize_test.rb
index a0e7f4ae60..72f09186e2 100644
--- a/activerecord/test/cases/sanitize_test.rb
+++ b/activerecord/test/cases/sanitize_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/binary"
require "models/author"
diff --git a/activerecord/test/cases/schema_dumper_test.rb b/activerecord/test/cases/schema_dumper_test.rb
index 86a0e93832..4c81e825fa 100644
--- a/activerecord/test/cases/schema_dumper_test.rb
+++ b/activerecord/test/cases/schema_dumper_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "support/schema_dumping_helper"
diff --git a/activerecord/test/cases/schema_loading_test.rb b/activerecord/test/cases/schema_loading_test.rb
index e3b7755f07..362370ac61 100644
--- a/activerecord/test/cases/schema_loading_test.rb
+++ b/activerecord/test/cases/schema_loading_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
module SchemaLoadCounter
diff --git a/activerecord/test/cases/scoping/default_scoping_test.rb b/activerecord/test/cases/scoping/default_scoping_test.rb
index 9919ed5e3f..89fb434b27 100644
--- a/activerecord/test/cases/scoping/default_scoping_test.rb
+++ b/activerecord/test/cases/scoping/default_scoping_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/post"
require "models/comment"
diff --git a/activerecord/test/cases/scoping/named_scoping_test.rb b/activerecord/test/cases/scoping/named_scoping_test.rb
index ea338a9847..483ea7128d 100644
--- a/activerecord/test/cases/scoping/named_scoping_test.rb
+++ b/activerecord/test/cases/scoping/named_scoping_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/post"
require "models/topic"
diff --git a/activerecord/test/cases/scoping/relation_scoping_test.rb b/activerecord/test/cases/scoping/relation_scoping_test.rb
index 644e7eb692..10553bf057 100644
--- a/activerecord/test/cases/scoping/relation_scoping_test.rb
+++ b/activerecord/test/cases/scoping/relation_scoping_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/post"
require "models/author"
diff --git a/activerecord/test/cases/secure_token_test.rb b/activerecord/test/cases/secure_token_test.rb
index 987ae3074f..7b9cbee40a 100644
--- a/activerecord/test/cases/secure_token_test.rb
+++ b/activerecord/test/cases/secure_token_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/user"
diff --git a/activerecord/test/cases/serialization_test.rb b/activerecord/test/cases/serialization_test.rb
index 82e0311d84..ec33ad38f2 100644
--- a/activerecord/test/cases/serialization_test.rb
+++ b/activerecord/test/cases/serialization_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/contact"
require "models/topic"
diff --git a/activerecord/test/cases/serialized_attribute_test.rb b/activerecord/test/cases/serialized_attribute_test.rb
index 6525730350..e1bdaab5cf 100644
--- a/activerecord/test/cases/serialized_attribute_test.rb
+++ b/activerecord/test/cases/serialized_attribute_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/topic"
require "models/reply"
diff --git a/activerecord/test/cases/statement_cache_test.rb b/activerecord/test/cases/statement_cache_test.rb
index ee1a8bfc36..fab3648564 100644
--- a/activerecord/test/cases/statement_cache_test.rb
+++ b/activerecord/test/cases/statement_cache_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/book"
require "models/liquid"
diff --git a/activerecord/test/cases/store_test.rb b/activerecord/test/cases/store_test.rb
index 0ece0632fe..633a8a0ebc 100644
--- a/activerecord/test/cases/store_test.rb
+++ b/activerecord/test/cases/store_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/admin"
require "models/admin/user"
diff --git a/activerecord/test/cases/suppressor_test.rb b/activerecord/test/cases/suppressor_test.rb
index bc85461322..a7d16b7cdb 100644
--- a/activerecord/test/cases/suppressor_test.rb
+++ b/activerecord/test/cases/suppressor_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/notification"
require "models/user"
diff --git a/activerecord/test/cases/tasks/database_tasks_test.rb b/activerecord/test/cases/tasks/database_tasks_test.rb
index b8280c4aaf..c47c97e9d9 100644
--- a/activerecord/test/cases/tasks/database_tasks_test.rb
+++ b/activerecord/test/cases/tasks/database_tasks_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "active_record/tasks/database_tasks"
diff --git a/activerecord/test/cases/tasks/mysql_rake_test.rb b/activerecord/test/cases/tasks/mysql_rake_test.rb
index 02c0cfbb92..9c6fb14376 100644
--- a/activerecord/test/cases/tasks/mysql_rake_test.rb
+++ b/activerecord/test/cases/tasks/mysql_rake_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "active_record/tasks/database_tasks"
diff --git a/activerecord/test/cases/tasks/postgresql_rake_test.rb b/activerecord/test/cases/tasks/postgresql_rake_test.rb
index 9369d1eedb..a2e968aedf 100644
--- a/activerecord/test/cases/tasks/postgresql_rake_test.rb
+++ b/activerecord/test/cases/tasks/postgresql_rake_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "active_record/tasks/database_tasks"
diff --git a/activerecord/test/cases/tasks/sqlite_rake_test.rb b/activerecord/test/cases/tasks/sqlite_rake_test.rb
index 0deedad671..ccb3834fee 100644
--- a/activerecord/test/cases/tasks/sqlite_rake_test.rb
+++ b/activerecord/test/cases/tasks/sqlite_rake_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "active_record/tasks/database_tasks"
require "pathname"
diff --git a/activerecord/test/cases/test_case.rb b/activerecord/test/cases/test_case.rb
index 247d0ec3d1..9f594fef85 100644
--- a/activerecord/test/cases/test_case.rb
+++ b/activerecord/test/cases/test_case.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "active_support/test_case"
require "active_support/testing/autorun"
require "active_support/testing/method_call_assertions"
diff --git a/activerecord/test/cases/test_fixtures_test.rb b/activerecord/test/cases/test_fixtures_test.rb
index e542716563..58d3bea3a2 100644
--- a/activerecord/test/cases/test_fixtures_test.rb
+++ b/activerecord/test/cases/test_fixtures_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
class TestFixturesTest < ActiveRecord::TestCase
diff --git a/activerecord/test/cases/time_precision_test.rb b/activerecord/test/cases/time_precision_test.rb
index 3a8f8af0e6..09c585167e 100644
--- a/activerecord/test/cases/time_precision_test.rb
+++ b/activerecord/test/cases/time_precision_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "support/schema_dumping_helper"
diff --git a/activerecord/test/cases/timestamp_test.rb b/activerecord/test/cases/timestamp_test.rb
index 0f58c96504..39b40e3411 100644
--- a/activerecord/test/cases/timestamp_test.rb
+++ b/activerecord/test/cases/timestamp_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "support/ddl_helper"
require "models/developer"
diff --git a/activerecord/test/cases/touch_later_test.rb b/activerecord/test/cases/touch_later_test.rb
index 24b5e8886f..d1e8c649d9 100644
--- a/activerecord/test/cases/touch_later_test.rb
+++ b/activerecord/test/cases/touch_later_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/invoice"
require "models/line_item"
diff --git a/activerecord/test/cases/transaction_callbacks_test.rb b/activerecord/test/cases/transaction_callbacks_test.rb
index aa0d8f5e65..eaa4dd09a9 100644
--- a/activerecord/test/cases/transaction_callbacks_test.rb
+++ b/activerecord/test/cases/transaction_callbacks_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/owner"
require "models/pet"
diff --git a/activerecord/test/cases/transaction_isolation_test.rb b/activerecord/test/cases/transaction_isolation_test.rb
index 380d7dbb0a..58abfadaf4 100644
--- a/activerecord/test/cases/transaction_isolation_test.rb
+++ b/activerecord/test/cases/transaction_isolation_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
unless ActiveRecord::Base.connection.supports_transaction_isolation?
diff --git a/activerecord/test/cases/transactions_test.rb b/activerecord/test/cases/transactions_test.rb
index ced6045955..79ba306ef5 100644
--- a/activerecord/test/cases/transactions_test.rb
+++ b/activerecord/test/cases/transactions_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/topic"
require "models/reply"
diff --git a/activerecord/test/cases/type/adapter_specific_registry_test.rb b/activerecord/test/cases/type/adapter_specific_registry_test.rb
index a723a952ea..8b836b4793 100644
--- a/activerecord/test/cases/type/adapter_specific_registry_test.rb
+++ b/activerecord/test/cases/type/adapter_specific_registry_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
module ActiveRecord
diff --git a/activerecord/test/cases/type/date_time_test.rb b/activerecord/test/cases/type/date_time_test.rb
index 9307587564..6848619ece 100644
--- a/activerecord/test/cases/type/date_time_test.rb
+++ b/activerecord/test/cases/type/date_time_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/task"
diff --git a/activerecord/test/cases/type/integer_test.rb b/activerecord/test/cases/type/integer_test.rb
index 13d6d2093b..368b6d7199 100644
--- a/activerecord/test/cases/type/integer_test.rb
+++ b/activerecord/test/cases/type/integer_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/company"
diff --git a/activerecord/test/cases/type/string_test.rb b/activerecord/test/cases/type/string_test.rb
index 899d7ae767..a95da864fa 100644
--- a/activerecord/test/cases/type/string_test.rb
+++ b/activerecord/test/cases/type/string_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
module ActiveRecord
diff --git a/activerecord/test/cases/type/type_map_test.rb b/activerecord/test/cases/type/type_map_test.rb
index f171175b2a..2959d36466 100644
--- a/activerecord/test/cases/type/type_map_test.rb
+++ b/activerecord/test/cases/type/type_map_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
module ActiveRecord
diff --git a/activerecord/test/cases/type/unsigned_integer_test.rb b/activerecord/test/cases/type/unsigned_integer_test.rb
index b0a60a2b3d..1cd4dbc2c5 100644
--- a/activerecord/test/cases/type/unsigned_integer_test.rb
+++ b/activerecord/test/cases/type/unsigned_integer_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
module ActiveRecord
diff --git a/activerecord/test/cases/type_test.rb b/activerecord/test/cases/type_test.rb
index 0f9f698760..d45a9b3141 100644
--- a/activerecord/test/cases/type_test.rb
+++ b/activerecord/test/cases/type_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
class TypeTest < ActiveRecord::TestCase
diff --git a/activerecord/test/cases/types_test.rb b/activerecord/test/cases/types_test.rb
index ea55bb00cd..11476ea0ef 100644
--- a/activerecord/test/cases/types_test.rb
+++ b/activerecord/test/cases/types_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
module ActiveRecord
diff --git a/activerecord/test/cases/unconnected_test.rb b/activerecord/test/cases/unconnected_test.rb
index 30efd03955..b210584644 100644
--- a/activerecord/test/cases/unconnected_test.rb
+++ b/activerecord/test/cases/unconnected_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
class TestRecord < ActiveRecord::Base
diff --git a/activerecord/test/cases/validations/absence_validation_test.rb b/activerecord/test/cases/validations/absence_validation_test.rb
index 051f14dbb7..870619e4e7 100644
--- a/activerecord/test/cases/validations/absence_validation_test.rb
+++ b/activerecord/test/cases/validations/absence_validation_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/face"
require "models/interest"
diff --git a/activerecord/test/cases/validations/association_validation_test.rb b/activerecord/test/cases/validations/association_validation_test.rb
index 0935dc8c32..f5ceb27d97 100644
--- a/activerecord/test/cases/validations/association_validation_test.rb
+++ b/activerecord/test/cases/validations/association_validation_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/topic"
require "models/reply"
diff --git a/activerecord/test/cases/validations/i18n_generate_message_validation_test.rb b/activerecord/test/cases/validations/i18n_generate_message_validation_test.rb
index fdfd568897..a57065ba75 100644
--- a/activerecord/test/cases/validations/i18n_generate_message_validation_test.rb
+++ b/activerecord/test/cases/validations/i18n_generate_message_validation_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/topic"
diff --git a/activerecord/test/cases/validations/i18n_validation_test.rb b/activerecord/test/cases/validations/i18n_validation_test.rb
index a020c877e7..fd88a3ea67 100644
--- a/activerecord/test/cases/validations/i18n_validation_test.rb
+++ b/activerecord/test/cases/validations/i18n_validation_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/topic"
require "models/reply"
diff --git a/activerecord/test/cases/validations/length_validation_test.rb b/activerecord/test/cases/validations/length_validation_test.rb
index 7f840dfa7c..ba45c6dcc1 100644
--- a/activerecord/test/cases/validations/length_validation_test.rb
+++ b/activerecord/test/cases/validations/length_validation_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/owner"
require "models/pet"
diff --git a/activerecord/test/cases/validations/presence_validation_test.rb b/activerecord/test/cases/validations/presence_validation_test.rb
index dee8528124..13956e26ec 100644
--- a/activerecord/test/cases/validations/presence_validation_test.rb
+++ b/activerecord/test/cases/validations/presence_validation_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/man"
require "models/face"
diff --git a/activerecord/test/cases/validations/uniqueness_validation_test.rb b/activerecord/test/cases/validations/uniqueness_validation_test.rb
index e943d03720..28605d2f8e 100644
--- a/activerecord/test/cases/validations/uniqueness_validation_test.rb
+++ b/activerecord/test/cases/validations/uniqueness_validation_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/topic"
require "models/reply"
diff --git a/activerecord/test/cases/validations_repair_helper.rb b/activerecord/test/cases/validations_repair_helper.rb
index 30299fd2c6..b30666d876 100644
--- a/activerecord/test/cases/validations_repair_helper.rb
+++ b/activerecord/test/cases/validations_repair_helper.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
module ActiveRecord
module ValidationsRepairHelper
extend ActiveSupport::Concern
diff --git a/activerecord/test/cases/validations_test.rb b/activerecord/test/cases/validations_test.rb
index fc9678211a..a305aa295a 100644
--- a/activerecord/test/cases/validations_test.rb
+++ b/activerecord/test/cases/validations_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/topic"
require "models/reply"
diff --git a/activerecord/test/cases/view_test.rb b/activerecord/test/cases/view_test.rb
index 89b72ec336..1d21a2454f 100644
--- a/activerecord/test/cases/view_test.rb
+++ b/activerecord/test/cases/view_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/book"
require "support/schema_dumping_helper"
diff --git a/activerecord/test/cases/yaml_serialization_test.rb b/activerecord/test/cases/yaml_serialization_test.rb
index 1b67e150f3..dd8d2c1178 100644
--- a/activerecord/test/cases/yaml_serialization_test.rb
+++ b/activerecord/test/cases/yaml_serialization_test.rb
@@ -1,4 +1,3 @@
-# frozen_string_literal: true
require "cases/helper"
require "models/topic"
require "models/reply"