--- a/tests/test-narrow-exchange-merges.t	Mon Jun 26 11:15:30 2023 +0100
+++ b/tests/test-narrow-exchange-merges.t	Mon Jun 26 14:34:58 2023 +0200
@@ -54,7 +54,7 @@
 
   $ hg update -r 'desc("outside 4a")'
   1 files updated, 0 files merged, 0 files removed, 0 files unresolved
-  $ hg merge -r 'desc("outside 4b")' 2>&1 | egrep -v '(warning:|incomplete!)'
+  $ hg merge -r 'desc("outside 4b")' 2>&1 | grep -E -v '(warning:|incomplete!)'
   merging outside/f
   0 files updated, 0 files merged, 0 files removed, 1 files unresolved
   use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
@@ -66,7 +66,7 @@
   $ echo 6 > outside/f
   $ hg commit -Aqm 'outside 6'
 
-  $ hg merge -r 'desc("outside 4c")' 2>&1 | egrep -v '(warning:|incomplete!)'
+  $ hg merge -r 'desc("outside 4c")' 2>&1 | grep -E -v '(warning:|incomplete!)'
   merging outside/f
   0 files updated, 0 files merged, 0 files removed, 1 files unresolved
   use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
@@ -78,7 +78,7 @@
   $ echo 8 > outside/f
   $ hg commit -Aqm 'outside 8'
 
-  $ hg merge -r 'desc("outside 4d")' 2>&1 | egrep -v '(warning:|incomplete!)'
+  $ hg merge -r 'desc("outside 4d")' 2>&1 | grep -E -v '(warning:|incomplete!)'
   merging outside/f
   0 files updated, 0 files merged, 0 files removed, 1 files unresolved
   use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon