diff -r 745b0df08514 -r 93228b2a1fc0 tests/test-run-tests.t
--- a/tests/test-run-tests.t	Mon Feb 26 17:27:08 2018 +0530
+++ b/tests/test-run-tests.t	Sun Feb 25 21:04:12 2018 -0500
@@ -541,10 +541,16 @@
   >   $ echo 'abort: child process failed to start blah'
   > EOF
   $ rt test-serve-fail.t
+  server failed to start (HGPORT=*) (glob)
+  --- $TESTTMP/test-serve-fail.t
+  +++ $TESTTMP/test-serve-fail.t.err
+  @@ -1* +1,2 @@ (glob)
+     $ echo 'abort: child process failed to start blah'
+  +  abort: child process failed to start blah
   
   ERROR: test-serve-fail.t output changed
   !
-  Failed test-serve-fail.t: server failed to start (HGPORT=*) (glob)
+  Failed test-serve-fail.t: output changed
   # Ran 1 tests, 0 skipped, 1 failed.
   python hash seed: * (glob)
   [1]