--- a/tests/SingletonsTestSuiteUtils.hs
+++ b/tests/SingletonsTestSuiteUtils.hs
@@ -201,7 +201,7 @@ testCompileAndDumpGroup testDir tests =
 filterWithSed :: FilePath -> IO ()
 filterWithSed file = runProcessWithOpts CreatePipe "sed"
 #ifdef darwin_HOST_OS
-  [ "-i", "''"
+  [ "-i"
 #else
   [ "-i"
 #endif