--- a/tests/test-obsolete-tag-cache.t	Sun Dec 16 16:31:31 2018 +0900
+++ b/tests/test-obsolete-tag-cache.t	Sat Dec 15 17:52:14 2018 +0900
@@ -4,6 +4,9 @@
   > rebase=
   > mock=$TESTDIR/mockblackbox.py
   > 
+  > [blackbox]
+  > track = command, commandfinish, tagscache
+  > 
   > [experimental]
   > evolution.createmarkers=True
   > EOF