diff --git a/tests/run-tests.py b/tests/run-tests.py
index c8725700259857c75f57bc5b9a595e9fb698d79c_dGVzdHMvcnVuLXRlc3RzLnB5..a8d22895a575ffaa88b8cf43ef6897b4b25b8503_dGVzdHMvcnVuLXRlc3RzLnB5 100755
--- a/tests/run-tests.py
+++ b/tests/run-tests.py
@@ -79,4 +79,5 @@
 processlock = threading.Lock()
 
 if sys.version_info > (3, 0, 0):
+    PYTHON3 = True
     xrange = range # we use xrange in one place, and we'd rather not use range
@@ -82,4 +83,6 @@
     xrange = range # we use xrange in one place, and we'd rather not use range
+else:
+    PYTHON3 = False
 
 def checkportisavailable(port):
     """return true if a port seems free to bind on localhost"""