diff --git a/tools/regression_test.sh b/tools/regression_test.sh
index 2165d69c8..12c7c79e9 100755
--- a/tools/regression_test.sh
+++ b/tools/regression_test.sh
@@ -361,7 +361,7 @@ function run_remote {
 
 function test_remote {
   if ! [ -z "$REMOTE_USER_AT_HOST" ]; then
-      cmd="$SSH $REMOTE_USER_AT_HOST $1"
+      cmd="$SSH $REMOTE_USER_AT_HOST '$1'"
   else
       cmd="$1"
   fi