diff --git a/tests/scripts/test022-ppolicy b/tests/scripts/test022-ppolicy
index 6a9cc6caed..292a97c1bf 100755
--- a/tests/scripts/test022-ppolicy
+++ b/tests/scripts/test022-ppolicy
@@ -105,7 +105,7 @@ fi
 
 DELAYATTR=`$LDAPSEARCH -D "$MANAGERDN" -H $URI1 -w $PASSWD -b "$USER" -E accountUsability 1.1`
 echo "$DELAYATTR" >> $SEARCHOUT
-DELAY=`echo "$DELAYATTR" | sed -n -e 's/.*seconds_before_unlock=\(\d*\)/\1/p'`
+DELAY=`echo "$DELAYATTR" | sed -n -e 's/.*seconds_before_unlock=\([[:digit:]]*\)/\1/p'`
 
 echo "Waiting $DELAY seconds for lockout to reset..."
 sleep $DELAY
@@ -122,7 +122,7 @@ fi
 
 DELAYATTR=`$LDAPSEARCH -D "$MANAGERDN" -H $URI1 -w $PASSWD -b "$USER" -E accountUsability 1.1`
 echo "$DELAYATTR" >> $SEARCHOUT
-DELAY=`echo "$DELAYATTR" | sed -n -e 's/.*expire=\(\d*\)/\1/p'`
+DELAY=`echo "$DELAYATTR" | sed -n -e 's/.*expire=\([[:digit:]]*\)/\1/p'`
 
 echo "Testing password expiration"
 echo "Waiting $DELAY seconds for password to expire..."
@@ -493,7 +493,7 @@ $LDAPSEARCH -e ppolicy -H $URI1 -D "$USER" -w $PASS \
 
 DELAYATTR=`$LDAPSEARCH -D "$MANAGERDN" -H $URI1 -w $PASSWD -b "$USER" -E accountUsability 1.1`
 echo "$DELAYATTR" >> $SEARCHOUT
-DELAY=`echo "$DELAYATTR" | sed -n -e 's/.*expire=\(\d*\)/\1/p'`
+DELAY=`echo "$DELAYATTR" | sed -n -e 's/.*expire=\([[:digit:]]*\)/\1/p'`
 
 echo "Waiting $DELAY seconds for password to expire..."
 sleep $DELAY
@@ -739,7 +739,7 @@ EOMODS
 
 DELAYATTR=`$LDAPSEARCH -D "$MANAGERDN" -H $URI1 -w $PASSWD -b "$USER" -E accountUsability 1.1`
 echo "$DELAYATTR" >> $TESTOUT
-DELAY=`echo "$DELAYATTR" | sed -n -e 's/.*expire=\(\d*\)/\1/p'`
+DELAY=`echo "$DELAYATTR" | sed -n -e 's/.*expire=\([[:digit:]]*\)/\1/p'`
 DELAY=`expr $DELAY - 10`
 
 echo "Testing password expiration"