diff -r 1415b78869eb -r 1f987f7c832b tests/run-tests.py
--- a/tests/run-tests.py	Thu Aug 16 00:40:20 2018 -0400
+++ b/tests/run-tests.py	Thu Aug 16 00:42:04 2018 -0400
@@ -1068,6 +1068,7 @@
         env["HGUSER"]   = "test"
         env["HGENCODING"] = "ascii"
         env["HGENCODINGMODE"] = "strict"
+        env["HGHOSTNAME"] = "test-hostname"
         env['HGIPV6'] = str(int(self._useipv6))
 
         extraextensions = []