diff --git a/test/run_all.in b/test/run_all.in
index 3b17893c8..02e5a1b6c 100755
--- a/test/run_all.in
+++ b/test/run_all.in
@@ -55,7 +55,7 @@ run_all_parallel() {
   rm _run_all_parallel.txt
 }
 
-if [ ! -z "$1" ] && [ "$1" -ne "--verbose" ] && [ "$1" -ne "--fast" ];
+if [ ! -z "$1" ] && [ "$1" != "--verbose" ] && [ "$1" != "--fast" ];
 then
   echo "Did you mean --fast or --verbose?"
   exit 1