diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index bb131f7..1a1c67b 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -4,7 +4,7 @@ on: [push, pull_request]
 
 jobs:
   test_linux:
-    runs-on: "ubuntu-latest"
+    runs-on: "ubuntu-20.04"
     name: "Ubuntu latest - Python ${{ matrix.python-version }}"
     env:
       USING_COVERAGE: '3.11'