diff --git a/compiler/tests/regress.py b/compiler/tests/regress.py
index abc1af4b..daf9f3b6 100755
--- a/compiler/tests/regress.py
+++ b/compiler/tests/regress.py
@@ -27,5 +27,5 @@ modules = map(__import__, moduleNames)
 suite = unittest.TestSuite()
 load = unittest.defaultTestLoader.loadTestsFromModule
 suite.addTests(map(load, modules))
-ret = unittest.TextTestRunner(verbosity=2).run(suite).wasSuccessful()
+ret = not unittest.TextTestRunner(verbosity=2).run(suite).wasSuccessful()
 sys.exit(ret)