diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 081e6f4..b5571e7 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -58,7 +58,7 @@ jobs:
         name: coverage-report
         path: htmlcov/*
   code-lint:
-    runs-on: ubuntu-20,04
+    runs-on: ubuntu-20.04
     steps:
     - uses: actions/checkout@v4
     - name: Set up Python 3.6