diff --git a/test/cache_test.rb b/test/cache_test.rb
index 4c41b093..8e68ee39 100644
--- a/test/cache_test.rb
+++ b/test/cache_test.rb
@@ -169,7 +169,7 @@ module ActiveModelSerializers
       if ENV['APPVEYOR'] && actual != expected
         skip('Cache expiration tests sometimes fail on Appveyor. FIXME :)')
       else
-        assert_equal actual, expected
+        assert_equal expected, actual
       end
     end