diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index bf02150..bb70d30 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -10,7 +10,7 @@ on:
 jobs:
   test-earliest:
     name: Run test suite on the earliest supported Python version
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
 
     steps:
       - uses: actions/checkout@v4