diff --git a/persistent-test/src/SumTypeTest.hs b/persistent-test/src/SumTypeTest.hs
index 79ae5f07e..750f370ea 100644
--- a/persistent-test/src/SumTypeTest.hs
+++ b/persistent-test/src/SumTypeTest.hs
@@ -1,4 +1,5 @@
 {-# LANGUAGE StandaloneDeriving #-}
+{-# LANGUAGE TypeOperators #-}
 {-# LANGUAGE UndecidableInstances #-}
 {-# OPTIONS_GHC -Wno-unused-top-binds #-}
 module SumTypeTest (specsWith, sumTypeMigrate) where
diff --git a/persistent-test/src/TransactionLevelTest.hs b/persistent-test/src/TransactionLevelTest.hs
index 32ee36d9b..c9a5c621d 100644
--- a/persistent-test/src/TransactionLevelTest.hs
+++ b/persistent-test/src/TransactionLevelTest.hs
@@ -1,4 +1,5 @@
 {-# LANGUAGE GeneralizedNewtypeDeriving #-}
+{-# LANGUAGE TypeOperators #-}
 {-# LANGUAGE UndecidableInstances #-}
 
 module TransactionLevelTest where