diff --git a/tests/test-merge-subrepos.t b/tests/test-merge-subrepos.t
--- a/tests/test-merge-subrepos.t
+++ b/tests/test-merge-subrepos.t
@@ -60,6 +60,7 @@
   $ hg id --config extensions.blackbox= --config blackbox.dirty=True
   9bfe45a197d7+ tip
   $ cat .hg/blackbox.log
+  * @9bfe45a197d7b0ab09bf287729dd57e9619c9da5+ (*)> serve --cmdserver chgunix * (glob) (chg !)
   * @9bfe45a197d7b0ab09bf287729dd57e9619c9da5+ (*)> id (glob)
   * @9bfe45a197d7b0ab09bf287729dd57e9619c9da5+ (*)> id --config *extensions.blackbox=* --config *blackbox.dirty=True* exited 0 * (glob)