diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index d3d26ec..8d11a49 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -8,9 +8,9 @@ jobs:
 
     runs-on: ubuntu-latest
     strategy:
-      max-parallel: 3
+      max-parallel: 4
       matrix:
-        python-version: [3.6, 3.7, 3.8]
+        python-version: [3.6, 3.7, 3.8, 3.9]
 
     steps:
     - uses: actions/checkout@v2