diff --git a/yesod-auth-oauth2.cabal b/yesod-auth-oauth2.cabal
index 21897e9..93b97a8 100644
--- a/yesod-auth-oauth2.cabal
+++ b/yesod-auth-oauth2.cabal
@@ -89,6 +89,7 @@ test-suite test
                  , yesod-auth-oauth2
                  , hspec
                  , uri-bytestring
+  other-modules:   URI.ByteString.ExtensionSpec
 
 source-repository head
   type:     git