1 files changed, 9 insertions, 0 deletions
diff --git a/railties/test/application/rake/dbs_test.rb b/railties/test/application/rake/dbs_test.rb
index 3dce315d3a..66d3137df0 100644
--- a/railties/test/application/rake/dbs_test.rb
+++ b/railties/test/application/rake/dbs_test.rb
@@ -174,6 +174,15 @@ module ApplicationTests
         require "#{app_path}/config/environment"
         db_test_load_structure
       end
+
+      test 'db:test deprecation' do
+        require "#{app_path}/config/environment"
+        Dir.chdir(app_path) do
+          output = `bundle exec rake db:migrate db:test:prepare 2>&1`
+          assert_equal "WARNING: db:test:prepare is deprecated. The Rails test helper now maintains " \
+                       "your test schema automatically, see the release notes for details.\n", output
+        end
+      end
     end
   end
 end