--- a/tests/test-topic-stack-data.t	Fri Aug 26 14:58:18 2016 +0200
+++ b/tests/test-topic-stack-data.t	Fri Aug 26 14:14:04 2016 +0200
@@ -240,6 +240,7 @@
 =======================================
 
   $ hg stack bar
+  ### topic: bar
   t5: add bar_c
   t2^ add bar_b (base)
   t4$ add bar_e (unstable)
@@ -248,14 +249,17 @@
   t1: add bar_a
     ^ add base_e
   $ hg stack baz
+  ### topic: baz
   t2: add baz_b
   t1: add baz_a
     ^ add base_c
   $ hg stack foo
+  ### topic: foo
   t2@ add foo_b (current)
   t1: add foo_a
     ^ add lake_a
   $ hg stack fuz
+  ### topic: fuz
   t3$ add fuz_c (unstable)
   t2$ add fuz_b (unstable)
   t1: fuz1_a