diff -Naur a/Test/D07multibyte.ztst b/Test/D07multibyte.ztst
--- a/Test/D07multibyte.ztst	2022-05-08 14:18:22.000000000 +0800
+++ b/Test/D07multibyte.ztst	2023-01-30 16:26:37.480018635 +0800
@@ -6,7 +6,7 @@
   unset -m LC_\*
   mb_ok=
   langs=(en_{US,GB}.{UTF-,utf}8 en.UTF-8
-	 $(locale -a 2>/dev/null | egrep 'utf8|UTF-8'))
+	 $(locale -a 2>/dev/null | grep -E 'utf8|UTF-8'))
   for LANG in $langs; do
     if [[ é = ? ]]; then
       mb_ok=1
diff -Naur a/Test/E01options.ztst b/Test/E01options.ztst
--- a/Test/E01options.ztst	2022-05-08 14:18:22.000000000 +0800
+++ b/Test/E01options.ztst	2023-01-30 16:26:37.481018640 +0800
@@ -651,7 +651,7 @@
 >noktarg1
 >0 1
 
-  showopt() { setopt | egrep 'localoptions|ksharrays'; }
+  showopt() { setopt | grep -E 'localoptions|ksharrays'; }
   f1() { setopt localoptions ksharrays; showopt }
   f2() { setopt ksharrays; showopt }
   setopt kshoptionprint
diff -Naur a/Test/V07pcre.ztst b/Test/V07pcre.ztst
--- a/Test/V07pcre.ztst	2022-05-08 14:18:22.000000000 +0800
+++ b/Test/V07pcre.ztst	2023-01-30 16:26:37.488018676 +0800
@@ -12,7 +12,7 @@
   unset -m LC_\*
   mb_ok=
   langs=(en_{US,GB}.{UTF-,utf}8 en.UTF-8
-	 $(locale -a 2>/dev/null | egrep 'utf8|UTF-8'))
+	 $(locale -a 2>/dev/null | grep -E 'utf8|UTF-8'))
   for LANG in $langs; do
     if [[ é = ? ]]; then
       mb_ok=1
diff -Naur a/Test/X02zlevi.ztst b/Test/X02zlevi.ztst
--- a/Test/X02zlevi.ztst	2022-05-08 14:18:22.000000000 +0800
+++ b/Test/X02zlevi.ztst	2023-01-30 16:26:37.492018696 +0800
@@ -4,7 +4,7 @@
   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'))
+	 $(locale -a 2>/dev/null | grep -E 'utf8|UTF-8'))
   for LANG in $langs; do
     if [[ é = ? ]]; then
       ZSH_TEST_LANG=$LANG 
diff -Naur a/Test/X03zlebindkey.ztst b/Test/X03zlebindkey.ztst
--- a/Test/X03zlebindkey.ztst	2022-05-08 14:18:22.000000000 +0800
+++ b/Test/X03zlebindkey.ztst	2023-01-30 16:26:37.492018696 +0800
@@ -6,7 +6,7 @@
   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'))
+	 $(locale -a 2>/dev/null | grep -E 'utf8|UTF-8'))
   for LANG in $langs; do
     if [[ é = ? ]]; then
       ZSH_TEST_LANG=$LANG
diff -Naur a/Test/Y01completion.ztst b/Test/Y01completion.ztst
--- a/Test/Y01completion.ztst	2022-05-08 14:18:22.000000000 +0800
+++ b/Test/Y01completion.ztst	2023-01-30 16:26:37.493018701 +0800
@@ -4,7 +4,7 @@
   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'))
+         $(locale -a 2>/dev/null | grep -E 'utf8|UTF-8'))
   for LANG in $langs; do
     if [[ é = ? ]]; then
       ZSH_TEST_LANG=$LANG