diff --git a/.github/workflows/check-standard.yaml b/.github/workflows/check-standard.yaml
index 0a4e9fd2..94c96290 100644
--- a/.github/workflows/check-standard.yaml
+++ b/.github/workflows/check-standard.yaml
@@ -15,6 +15,7 @@ jobs:
 
     strategy:
       fail-fast: false
+      max-parallel: 1
       matrix:
         config:
           - {os: macos-latest,   r: 'release'}