diff --git a/tests/run-tests.py b/tests/run-tests.py
--- a/tests/run-tests.py
+++ b/tests/run-tests.py
@@ -88,7 +88,6 @@ def Popen4(cmd, wd, timeout, env=None):
             p.timeout = True
             if p.returncode is None:
                 terminate(p)
-                p.wait()
         threading.Thread(target=t).start()
 
     return p