--- a/tests/test-topic-stack.t	Wed May 03 13:12:39 2017 +0200
+++ b/tests/test-topic-stack.t	Thu May 18 22:53:01 2017 +0200
@@ -4,6 +4,8 @@
 
 
   $ cat << EOF >> $HGRCPATH
+  > [extensions]
+  > color =
   > [ui]
   > logtemplate = {rev} {branch} \{{get(namespaces, "topics")}} {phase} {desc|firstline}\n
   > [experimental]