# HG changeset patch
# User Augie Fackler <augie@google.com>
# Date 2018-03-01 20:46:21
# Node ID c3df20906689676de549f81ce9c62c43212c3e34
# Parent  c3692364b344c60446723648c5b0e2b3245be6d2

tests: fix run-tests environment cleanup on Python 3

Differential Revision: https://phab.mercurial-scm.org/D2521

diff --git a/tests/run-tests.py b/tests/run-tests.py
--- a/tests/run-tests.py
+++ b/tests/run-tests.py
@@ -1087,7 +1087,7 @@ class Test(unittest.TestCase):
                 del env[k]
 
         # unset env related to hooks
-        for k in env.keys():
+        for k in list(env):
             if k.startswith('HG_'):
                 del env[k]