1 files changed, 10 insertions, 1 deletions
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 3657b8340d..02e76ce146 100644
--- a/activerecord/test/cases/connection_adapters/mysql_type_lookup_test.rb
+++ b/activerecord/test/cases/connection_adapters/mysql_type_lookup_test.rb
@@ -1,13 +1,22 @@
+# frozen_string_literal: true
+
 require "cases/helper"
+require "support/connection_helper"
 
 if current_adapter?(:Mysql2Adapter)
   module ActiveRecord
     module ConnectionAdapters
       class MysqlTypeLookupTest < ActiveRecord::TestCase
+        include ConnectionHelper
+
         setup do
           @connection = ActiveRecord::Base.connection
         end
 
+        def teardown
+          reset_connection
+        end
+
         def test_boolean_types
           emulate_booleans(true) do
             assert_lookup_type :boolean, "tinyint(1)"
@@ -47,7 +56,7 @@ if current_adapter?(:Mysql2Adapter)
         private
 
           def assert_lookup_type(type, lookup)
-            cast_type = @connection.type_map.lookup(lookup)
+            cast_type = @connection.send(:type_map).lookup(lookup)
             assert_equal type, cast_type.type
           end