diff --git a/run-all-speedtests.sh b/run-all-speedtests.sh
index 237c76b..ba500ae 100755
--- a/run-all-speedtests.sh
+++ b/run-all-speedtests.sh
@@ -17,7 +17,8 @@ local_servers=$(speedtest -L)
 local_servers=(${local_servers//$'\n'/ })
 
 for serverID in ${local_servers[@]}; do
-	[[ ${serverID} =~ '^[[:digit:]]{4,6}$' ]] && echo ${serverID}
+	re='^[[:digit:]]{4,6}$'
+	[[ ${serverID} =~ ${re} ]] && echo ${serverID}
 	# [[ ${serverID} =~ '^[[:digit:]]{4,6}$' ]] && speedtest -s ${serverID}
 done