diff --git a/test/test_helper.rb b/test/test_helper.rb
index f2e6f275005a7d8cab6a55f84fb0f50d9d4ef39e..abb3efa09726e8f78db1df3c6394b678ae3f553d 100644
--- a/test/test_helper.rb
+++ b/test/test_helper.rb
@@ -20,7 +20,7 @@ if configs.keys.include? ENV['DB']
     require 'sqlite_ext'
     SqliteExt.register_ruby_math
   end
-  ActiveRecord::Base.establish_connection(db_name)
+  ActiveRecord::Base.establish_connection(db_name.to_sym)
   ActiveRecord::Base.default_timezone = :utc
 
   ActiveRecord::Migrator.migrate('test/db/migrate', nil)