diff --git a/benchmark.sh b/benchmark.sh
index 20b8f6c12ab..4de09f66e06 100755
--- a/benchmark.sh
+++ b/benchmark.sh
@@ -20,7 +20,7 @@ do
     git reset --hard > /dev/null 2>&1 &&
     printf '%s' "$BRANCH"
     composer update -q
-    (for _ in $(seq 1 10); do php php-cs-fixer fix --dry-run 2> /dev/null ; done) | grep -i seconds | awk '
+    (for _ in $(seq 1 10); do php php-cs-fixer fix --dry-run --sequential 2> /dev/null ; done) | grep -i seconds | awk '
     {
         total += $5;
         ++count;