diff --git a/tests/run-tests.py b/tests/run-tests.py
--- a/tests/run-tests.py
+++ b/tests/run-tests.py
@@ -1109,4 +1109,5 @@ def main():
         time.sleep(1)
         cleanup(options)
 
-main()
+if __name__ == '__main__':
+    main()