--- a/tests/test-topic-stack.t	Fri Sep 15 23:13:05 2017 +0530
+++ b/tests/test-topic-stack.t	Fri Sep 15 23:25:38 2017 +0530
@@ -68,6 +68,7 @@
   ### topic: other
   ### branch: default
   (stack is empty)
+  t0^ c_b (base)
 
   $ hg up foo
   switching to topic foo
@@ -227,6 +228,7 @@
   $ hg stack
   ### branch: default
   (stack is empty)
+  b0^ c_f (base)
 
 Test "t#" reference
 -------------------