diff --git a/compiler/tests/regress.py b/compiler/tests/regress.py
old mode 100644
new mode 100755
index 1c07246f..abc1af4b
--- a/compiler/tests/regress.py
+++ b/compiler/tests/regress.py
@@ -27,4 +27,5 @@ modules = map(__import__, moduleNames)
 suite = unittest.TestSuite()
 load = unittest.defaultTestLoader.loadTestsFromModule
 suite.addTests(map(load, modules))
-unittest.TextTestRunner(verbosity=2).run(suite)
+ret = unittest.TextTestRunner(verbosity=2).run(suite).wasSuccessful()
+sys.exit(ret)