https://github.com/zsh-users/zsh/commit/4fc5dc0292acd77f17281f451774ba2ca4203026

commit 4fc5dc0292acd77f17281f451774ba2ca4203026
Author: Jun-ichi Takimoto <takimoto-j@kba.biglobe.ne.jp>
Date:   2022-09-15 18:56:20 +0900

    50629: do not use egrep in tests

    (ChangeLog changes removed)

diff --git a/Test/D07multibyte.ztst b/Test/D07multibyte.ztst
index e2e9a25ef..6909346cb 100644
--- a/Test/D07multibyte.ztst
+++ b/Test/D07multibyte.ztst
@@ -1,19 +1,7 @@
 %prep
 
-# Find a UTF-8 locale.
-  setopt multibyte
-# Don't let LC_* override our choice of locale.
-  unset -m LC_\*
-  mb_ok=
-  langs=(en_{US,GB}.{UTF-,utf}8 en.UTF-8
-	 $(locale -a 2>/dev/null | egrep 'utf8|UTF-8'))
-  for LANG in $langs; do
-    if [[ é = ? ]]; then
-      mb_ok=1
-      break;
-    fi
-  done
-  if [[ -z $mb_ok ]]; then
+  LANG=$(ZTST_find_UTF8)
+  if [[ -z $LANG ]]; then
     ZTST_unimplemented="no UTF-8 locale or multibyte mode is not implemented"
   else
     print -u $ZTST_fd Testing multibyte with locale $LANG
diff --git a/Test/E01options.ztst b/Test/E01options.ztst
index 2acbfd357..d38fbed74 100644
--- a/Test/E01options.ztst
+++ b/Test/E01options.ztst
@@ -651,7 +651,7 @@
 >noktarg1
 >0 1
 
-  showopt() { setopt | egrep 'localoptions|ksharrays'; }
+  showopt() { echo ${(FM)${(@f)"$(setopt)"}:#(localoptions|ksharrays)*} }
   f1() { setopt localoptions ksharrays; showopt }
   f2() { setopt ksharrays; showopt }
   setopt kshoptionprint
diff --git a/Test/V07pcre.ztst b/Test/V07pcre.ztst
index c9c844d2a..ca13419e5 100644
--- a/Test/V07pcre.ztst
+++ b/Test/V07pcre.ztst
@@ -6,20 +6,8 @@
     return 0
   fi
   setopt rematch_pcre
-# Find a UTF-8 locale.
-  setopt multibyte
-# Don't let LC_* override our choice of locale.
-  unset -m LC_\*
-  mb_ok=
-  langs=(en_{US,GB}.{UTF-,utf}8 en.UTF-8
-	 $(locale -a 2>/dev/null | egrep 'utf8|UTF-8'))
-  for LANG in $langs; do
-    if [[ é = ? ]]; then
-      mb_ok=1
-      break;
-    fi
-  done
-  if [[ -z $mb_ok ]]; then
+  LANG=$(ZTST_find_UTF8)
+  if [[ -z $LANG ]]; then
     ZTST_unimplemented="no UTF-8 locale or multibyte mode is not implemented"
   else
     print -u $ZTST_fd Testing PCRE multibyte with locale $LANG
diff --git a/Test/X02zlevi.ztst b/Test/X02zlevi.ztst
index 8146d6752..203c13c32 100644
--- a/Test/X02zlevi.ztst
+++ b/Test/X02zlevi.ztst
@@ -1,16 +1,7 @@
 # Tests of the vi mode of ZLE
 
 %prep
-  unset -m LC_\*
-  ZSH_TEST_LANG=
-  langs=(en_{US,GB}.{UTF-,utf}8 en.UTF-8
-	 $(locale -a 2>/dev/null | egrep 'utf8|UTF-8'))
-  for LANG in $langs; do
-    if [[ é = ? ]]; then
-      ZSH_TEST_LANG=$LANG 
-      break;
-    fi
-  done
+  ZSH_TEST_LANG=$(ZTST_find_UTF8)
   if ( zmodload zsh/zpty 2>/dev/null ); then
     . $ZTST_srcdir/comptest
     comptestinit -v -z $ZTST_testdir/../Src/zsh
diff --git a/Test/X03zlebindkey.ztst b/Test/X03zlebindkey.ztst
index 43692a85b..5277332a7 100644
--- a/Test/X03zlebindkey.ztst
+++ b/Test/X03zlebindkey.ztst
@@ -3,16 +3,7 @@
 # into bindings.  The latter is particularly tricky with multibyte sequences.
 
 %prep
-  unset -m LC_\*
-  ZSH_TEST_LANG=
-  langs=(en_{US,GB}.{UTF-,utf}8 en.UTF-8
-	 $(locale -a 2>/dev/null | egrep 'utf8|UTF-8'))
-  for LANG in $langs; do
-    if [[ é = ? ]]; then
-      ZSH_TEST_LANG=$LANG
-      break;
-    fi
-  done
+  ZSH_TEST_LANG=$(ZTST_find_UTF8)
   if ( zmodload zsh/zpty 2>/dev/null ); then
     . $ZTST_srcdir/comptest
     comptestinit -z $ZTST_testdir/../Src/zsh
diff --git a/Test/Y01completion.ztst b/Test/Y01completion.ztst
index 6af0efc6d..f976f9f91 100644
--- a/Test/Y01completion.ztst
+++ b/Test/Y01completion.ztst
@@ -1,16 +1,7 @@
 # Tests for completion system.
 
 %prep
-  unset -m LC_\*
-  ZSH_TEST_LANG=
-  langs=(en_{US,GB}.{UTF-,utf}8 en.UTF-8
-         $(locale -a 2>/dev/null | egrep 'utf8|UTF-8'))
-  for LANG in $langs; do
-    if [[ é = ? ]]; then
-      ZSH_TEST_LANG=$LANG
-      break;
-    fi
-  done
+  ZSH_TEST_LANG=$(ZTST_find_UTF8)
   if ( zmodload zsh/zpty 2>/dev/null ); then
     . $ZTST_srcdir/comptest
     mkdir comp.tmp
diff --git a/Test/ztst.zsh b/Test/ztst.zsh
index aca275c1c..d95b726e7 100755
--- a/Test/ztst.zsh
+++ b/Test/ztst.zsh
@@ -37,6 +37,21 @@ emulate -R zsh
 # LANG must be passed to child zsh.
 export LANG
 
+# find UTF-8 locale
+ZTST_find_UTF8 () {
+  setopt multibyte
+  # Don't let LC_* override our choice of locale.
+  unset -m LC_\*
+  local langs=(en_{US,GB}.{UTF-,utf}8 en.UTF-8
+               ${(M)$(locale -a 2>/dev/null):#*.(utf8|UTF-8)})
+  for LANG in $langs; do
+    if [[ é = ? ]]; then
+      echo $LANG
+      return
+    fi
+  done
+}
+
 # Don't propagate variables that are set by default in the shell.
 typeset +x WORDCHARS