--- a/tests/test-help.t	Mon Jun 26 11:15:30 2023 +0100
+++ b/tests/test-help.t	Mon Jun 26 14:34:58 2023 +0200
@@ -799,7 +799,7 @@
 
 Checking that help adapts based on the config:
 
-  $ hg help diff --config ui.tweakdefaults=true | egrep -e '^ *(-g|config)'
+  $ hg help diff --config ui.tweakdefaults=true | grep -E -e '^ *(-g|config)'
    -g --[no-]git            use git extended diff format (default: on from
                             config)
 
@@ -1585,7 +1585,7 @@
 Show nested definitions
 ("profiling.type"[break]"ls"[break]"stat"[break])
 
-  $ hg help config.type | egrep '^$'|wc -l
+  $ hg help config.type | grep -E '^$'|wc -l
   \s*3 (re)
 
   $ hg help config.profiling.type.ls
@@ -1598,7 +1598,7 @@
 
 Separate sections from subsections
 
-  $ hg help config.format | egrep '^    ("|-)|^\s*$' | uniq
+  $ hg help config.format | grep -E '^    ("|-)|^\s*$' | uniq
       "format"
       --------
   
@@ -1660,7 +1660,7 @@
 
 Test templating help
 
-  $ hg help templating | egrep '(desc|diffstat|firstline|nonempty)  '
+  $ hg help templating | grep -E '(desc|diffstat|firstline|nonempty)  '
       desc          String. The text of the changeset description.
       diffstat      String. Statistics of changes with the following format:
       firstline     Any text. Returns the first line of text.
@@ -1701,12 +1701,12 @@
 
 help -c should only show debug --debug
 
-  $ hg help -c --debug|egrep debug|wc -l|egrep '^\s*0\s*$'
+  $ hg help -c --debug|grep -E debug|wc -l|grep -E '^\s*0\s*$'
   [1]
 
 help -c should only show deprecated for -v
 
-  $ hg help -c -v|egrep DEPRECATED|wc -l|egrep '^\s*0\s*$'
+  $ hg help -c -v|grep -E DEPRECATED|wc -l|grep -E '^\s*0\s*$'
   [1]
 
 Test -s / --system
@@ -1720,11 +1720,11 @@
 
 Test -e / -c / -k combinations
 
-  $ hg help -c|egrep '^[A-Z].*:|^ debug'
+  $ hg help -c|grep -E '^[A-Z].*:|^ debug'
   Commands:
-  $ hg help -e|egrep '^[A-Z].*:|^ debug'
+  $ hg help -e|grep -E '^[A-Z].*:|^ debug'
   Extensions:
-  $ hg help -k|egrep '^[A-Z].*:|^ debug'
+  $ hg help -k|grep -E '^[A-Z].*:|^ debug'
   Topics:
   Commands:
   Extensions:
@@ -1735,11 +1735,11 @@
   [10]
   $ hg help -e schemes |head -1
   schemes extension - extend schemes with shortcuts to repository swarms
-  $ hg help -c -k dates |egrep '^(Topics|Extensions|Commands):'
+  $ hg help -c -k dates |grep -E '^(Topics|Extensions|Commands):'
   Commands:
-  $ hg help -e -k a |egrep '^(Topics|Extensions|Commands):'
+  $ hg help -e -k a |grep -E '^(Topics|Extensions|Commands):'
   Extensions:
-  $ hg help -e -c -k date |egrep '^(Topics|Extensions|Commands):'
+  $ hg help -e -c -k date |grep -E '^(Topics|Extensions|Commands):'
   Extensions:
   Commands:
   $ hg help -c commit > /dev/null