diff -ur a/StartupFiles/zshrc b/StartupFiles/zshrc
--- a/StartupFiles/zshrc	2023-04-06 03:22:25.087384786 +0000
+++ b/StartupFiles/zshrc	2023-04-06 03:24:55.577428609 +0000
@@ -29,7 +29,7 @@
 alias po=popd
 alias d='dirs -v'
 alias h=history
-alias grep=egrep
+alias grep='grep -E'
 alias ll='ls -l'
 alias la='ls -a'
 
diff -ur a/Test/D07multibyte.ztst b/Test/D07multibyte.ztst
--- a/Test/D07multibyte.ztst	2023-04-06 03:22:25.023387336 +0000
+++ b/Test/D07multibyte.ztst	2023-04-06 03:23:50.116009605 +0000
@@ -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 -ur a/Test/E01options.ztst b/Test/E01options.ztst
--- a/Test/E01options.ztst	2023-04-06 03:22:25.019387496 +0000
+++ b/Test/E01options.ztst	2023-04-06 03:22:45.338578392 +0000
@@ -649,7 +649,7 @@
 >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 -ur a/Test/V07pcre.ztst b/Test/V07pcre.ztst
--- a/Test/V07pcre.ztst	2023-04-06 03:22:25.019387496 +0000
+++ b/Test/V07pcre.ztst	2023-04-06 03:24:15.802995141 +0000
@@ -13,7 +13,7 @@
   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 -ur a/Test/X02zlevi.ztst b/Test/X02zlevi.ztst
--- a/Test/X02zlevi.ztst	2023-04-06 03:22:25.023387336 +0000
+++ b/Test/X02zlevi.ztst	2023-04-06 03:24:25.162626050 +0000
@@ -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 -ur a/Test/X03zlebindkey.ztst b/Test/X03zlebindkey.ztst
--- a/Test/X03zlebindkey.ztst	2023-04-06 03:22:25.015387655 +0000
+++ b/Test/X03zlebindkey.ztst	2023-04-06 03:24:02.531518995 +0000
@@ -5,7 +5,7 @@
 %prep
   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 -ur a/Test/Y01completion.ztst b/Test/Y01completion.ztst
--- a/Test/Y01completion.ztst	2023-04-06 03:22:25.019387496 +0000
+++ b/Test/Y01completion.ztst	2023-04-06 03:23:35.392592114 +0000
@@ -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