diff --git a/.github/workflows/nightly.yaml b/.github/workflows/nightly.yaml
index 7115f3c..ff9cd24 100644
--- a/.github/workflows/nightly.yaml
+++ b/.github/workflows/nightly.yaml
@@ -37,4 +37,4 @@ jobs:
           dart pub get
       - run: |
           cd test
-          dart run test
+          dart run test -j 1