diff --git a/yesod-core/yesod-core.cabal b/yesod-core/yesod-core.cabal
index 756d71ec..d7b4b929 100644
--- a/yesod-core/yesod-core.cabal
+++ b/yesod-core/yesod-core.cabal
@@ -146,6 +146,7 @@ test-suite tests
                    YesodCoreTest.Header
                    YesodCoreTest.Csrf
                    YesodCoreTest.ErrorHandling
+                   YesodCoreTest.ErrorHandling.CustomApp
                    YesodCoreTest.Exceptions
                    YesodCoreTest.InternalRequest
                    YesodCoreTest.JsLoader