--- a/tests/test-debugcommands.t	Mon Jun 26 11:15:30 2023 +0100
+++ b/tests/test-debugcommands.t	Mon Jun 26 14:34:58 2023 +0200
@@ -576,7 +576,7 @@
 Test debugcolor
 
 #if no-windows
-  $ hg debugcolor --style --color always | egrep 'mode|style|log\.'
+  $ hg debugcolor --style --color always | grep -E 'mode|style|log\.'
   color mode: 'ansi'
   available style:
   \x1b[0;33mlog.changeset\x1b[0m:                      \x1b[0;33myellow\x1b[0m (esc)