3 files changed, 3 insertions, 3 deletions
diff --git a/activerecord/test/cases/tasks/firebird_rake_test.rb b/activerecord/test/cases/tasks/firebird_rake_test.rb
index 37b734605b..c54989ae34 100644
--- a/activerecord/test/cases/tasks/firebird_rake_test.rb
+++ b/activerecord/test/cases/tasks/firebird_rake_test.rb
@@ -23,7 +23,7 @@ module ActiveRecord
           ActiveSupport::Deprecation.silence { super }
         end
       end
-      ActiveRecord::Tasks::DatabaseTasks.stubs(:class_for_adapter).returns(@tasks)
+      ActiveRecord::Tasks::DatabaseTasks.stubs(:class_for_adapter).returns(@tasks) unless defined? ActiveRecord::ConnectionAdapters::FirebirdAdapter
     end
   end
 
diff --git a/activerecord/test/cases/tasks/oracle_rake_test.rb b/activerecord/test/cases/tasks/oracle_rake_test.rb
index 3d8e99b1f5..5f840febbc 100644
--- a/activerecord/test/cases/tasks/oracle_rake_test.rb
+++ b/activerecord/test/cases/tasks/oracle_rake_test.rb
@@ -17,7 +17,7 @@ module ActiveRecord
           ActiveSupport::Deprecation.silence { super }
         end
       end
-      ActiveRecord::Tasks::DatabaseTasks.stubs(:class_for_adapter).returns(@tasks)
+      ActiveRecord::Tasks::DatabaseTasks.stubs(:class_for_adapter).returns(@tasks) unless defined? ActiveRecord::ConnectionAdapters::OracleAdapter
     end
   end
 
diff --git a/activerecord/test/cases/tasks/sqlserver_rake_test.rb b/activerecord/test/cases/tasks/sqlserver_rake_test.rb
index b66980f622..0f1264b8ce 100644
--- a/activerecord/test/cases/tasks/sqlserver_rake_test.rb
+++ b/activerecord/test/cases/tasks/sqlserver_rake_test.rb
@@ -20,7 +20,7 @@ module ActiveRecord
           ActiveSupport::Deprecation.silence { super }
         end
       end
-      ActiveRecord::Tasks::DatabaseTasks.stubs(:class_for_adapter).returns(@tasks)
+      ActiveRecord::Tasks::DatabaseTasks.stubs(:class_for_adapter).returns(@tasks) unless defined? ActiveRecord::ConnectionAdapters::SQLServerAdapter
     end
   end