diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index be63f08..db1aab6 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -51,6 +51,7 @@ jobs:
   pytest:
     runs-on: ubuntu-latest
     strategy:
+      max-parallel: 1
       matrix:
         python-version: ["3.10", "3.11", "3.12"]
       fail-fast: false