2 files changed, 10 insertions, 2 deletions
diff --git a/activerecord/test/cases/adapters/mysql/schema_test.rb b/activerecord/test/cases/adapters/mysql/schema_test.rb
index a2155d1dd1..1aa034ed53 100644
--- a/activerecord/test/cases/adapters/mysql/schema_test.rb
+++ b/activerecord/test/cases/adapters/mysql/schema_test.rb
@@ -13,7 +13,7 @@ module ActiveRecord
         table       = Post.table_name
         @db_name    = db
 
-        @omgpost = Class.new(Post) do
+        @omgpost = Class.new(ActiveRecord::Base) do
           set_table_name "#{db}.#{table}"
           def self.name; 'Post'; end
         end
@@ -23,6 +23,10 @@ module ActiveRecord
         assert @omgpost.find(:first)
       end
 
+      def test_primary_key
+        assert_equal 'id', @omgpost.primary_key
+      end
+
       def test_table_exists?
         name = @omgpost.table_name
         assert @connection.table_exists?(name), "#{name} table should exist"
diff --git a/activerecord/test/cases/adapters/mysql2/schema_test.rb b/activerecord/test/cases/adapters/mysql2/schema_test.rb
index 858d1da2dd..49514e1539 100644
--- a/activerecord/test/cases/adapters/mysql2/schema_test.rb
+++ b/activerecord/test/cases/adapters/mysql2/schema_test.rb
@@ -13,7 +13,7 @@ module ActiveRecord
         table       = Post.table_name
         @db_name    = db
 
-        @omgpost = Class.new(Post) do
+        @omgpost = Class.new(ActiveRecord::Base) do
           set_table_name "#{db}.#{table}"
           def self.name; 'Post'; end
         end
@@ -23,6 +23,10 @@ module ActiveRecord
         assert @omgpost.find(:first)
       end
 
+      def test_primary_key
+        assert_equal 'id', @omgpost.primary_key
+      end
+
       def test_table_exists?
         name = @omgpost.table_name
         assert @connection.table_exists?(name), "#{name} table should exist"