1 files changed, 12 insertions, 1 deletions
diff --git a/activerecord/test/cases/adapters/postgresql/uuid_test.rb b/activerecord/test/cases/adapters/postgresql/uuid_test.rb
index 52e4a38cae..8eddd81c38 100644
--- a/activerecord/test/cases/adapters/postgresql/uuid_test.rb
+++ b/activerecord/test/cases/adapters/postgresql/uuid_test.rb
@@ -40,7 +40,8 @@ class PostgresqlUUIDTest < ActiveRecord::PostgreSQLTestCase
     drop_table "uuid_data_type"
   end
 
-  if ActiveRecord::Base.connection.supports_pgcrypto_uuid?
+  if ActiveRecord::Base.connection.respond_to?(:supports_pgcrypto_uuid?) &&
+      ActiveRecord::Base.connection.supports_pgcrypto_uuid?
     def test_uuid_column_default
       connection.add_column :uuid_data_type, :thingy, :uuid, null: false, default: "gen_random_uuid()"
       UUIDType.reset_column_information
@@ -63,6 +64,16 @@ class PostgresqlUUIDTest < ActiveRecord::PostgreSQLTestCase
     UUIDType.reset_column_information
   end
 
+  def test_add_column_with_null_true_and_default_nil
+    connection.add_column :uuid_data_type, :thingy, :uuid, null: true, default: nil
+
+    UUIDType.reset_column_information
+    column = UUIDType.columns_hash["thingy"]
+
+    assert column.null
+    assert_nil column.default
+  end
+
   def test_data_type_of_uuid_types
     column = UUIDType.columns_hash["guid"]
     assert_equal :uuid, column.type