--- a/tests/run-tests.py	Fri May 19 12:18:25 2017 +0200
+++ b/tests/run-tests.py	Mon May 22 16:59:57 2017 +0200
@@ -956,6 +956,7 @@
         hgrc.write(b'tag = -d "0 0"\n')
         hgrc.write(b'[devel]\n')
         hgrc.write(b'all-warnings = true\n')
+        hgrc.write(b'default-date = 0 0\n')
         hgrc.write(b'[largefiles]\n')
         hgrc.write(b'usercache = %s\n' %
                    (os.path.join(self._testtmp, b'.cache/largefiles')))