diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 829bdb2..53405f4 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -8,7 +8,7 @@ on:
 
 jobs:
   test:
-    runs-on: ubuntu-22.04
+    runs-on: ubuntu-20.04
     strategy:
       matrix:
         include:
@@ -16,7 +16,7 @@ jobs:
             toxenv: py27-core
           - python-version: 3.9
             toxenv: py39-core
-          - python-version: 3.10
+          - python-version: "3.10"
             toxenv: py310-core
           - python-version: 3.11
             toxenv: py311-core