diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index cc6aca9..c164b83 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -539,7 +539,7 @@ jobs:
       run: ./build/wasm3 ./test/wasi/test.wasm
 
   build-python:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-20.04
     strategy:
       fail-fast: false
       matrix: