diff -r db5dddb38f5b -r 9261f6c1d39b tests/test-phases-exchange.t
--- a/tests/test-phases-exchange.t	Mon Nov 23 10:38:05 2020 -0800
+++ b/tests/test-phases-exchange.t	Mon Nov 23 16:39:53 2020 -0800
@@ -1017,7 +1017,7 @@
   searching for changes
   abort: push creates new remote head 435b5d83910c
   (merge or see 'hg help push' for details about pushing new heads)
-  [255]
+  [20]
   $ hg push -fr 435b5d83910c ../mu # because the push will create new visible head
   pushing to ../mu
   searching for changes