diff --git a/activerecord/test/cases/tasks/mysql_rake_test.rb b/activerecord/test/cases/tasks/mysql_rake_test.rb
index 043e8ca8e7..f58535f044 100644
--- a/activerecord/test/cases/tasks/mysql_rake_test.rb
+++ b/activerecord/test/cases/tasks/mysql_rake_test.rb
@@ -1,5 +1,6 @@
 require 'cases/helper'
 
+if current_adapter?(:MysqlAdapter, :Mysql2Adapter)
 module ActiveRecord
   class MysqlDBCreateTest < ActiveRecord::TestCase
     def setup
@@ -307,3 +308,4 @@ def test_structure_load
   end
 
 end
+end
diff --git a/activerecord/test/cases/tasks/postgresql_rake_test.rb b/activerecord/test/cases/tasks/postgresql_rake_test.rb
index 6ea225178f..0d574d071c 100644
--- a/activerecord/test/cases/tasks/postgresql_rake_test.rb
+++ b/activerecord/test/cases/tasks/postgresql_rake_test.rb
@@ -1,5 +1,6 @@
 require 'cases/helper'
 
+if current_adapter?(:PostgreSQLAdapter)
 module ActiveRecord
   class PostgreSQLDBCreateTest < ActiveRecord::TestCase
     def setup
@@ -241,3 +242,4 @@ def test_structure_load_accepts_path_with_spaces
   end
 
 end
+end
diff --git a/activerecord/test/cases/tasks/sqlite_rake_test.rb b/activerecord/test/cases/tasks/sqlite_rake_test.rb
index da3471adf9..750d5e42dc 100644
--- a/activerecord/test/cases/tasks/sqlite_rake_test.rb
+++ b/activerecord/test/cases/tasks/sqlite_rake_test.rb
@@ -1,6 +1,7 @@
 require 'cases/helper'
 require 'pathname'
 
+if current_adapter?(:SQLite3Adapter)
 module ActiveRecord
   class SqliteDBCreateTest < ActiveRecord::TestCase
     def setup
@@ -189,3 +190,4 @@ def test_structure_load
     end
   end
 end
+end