diff --git a/tests/run_tests.py b/tests/run_tests.py
index 13a404a..f812923 100755
--- a/tests/run_tests.py
+++ b/tests/run_tests.py
@@ -755,7 +755,7 @@ def main():
 
     try:
         opts, args = getopt.getopt(sys.argv[1:], "vVft:b:p:c:lh")
-    except getopt.GetoptError, err:
+    except getopt.GetoptError as err:
         print(str(err))
         sys.exit(1)
     for opt, arg in opts: