diff --git a/.github/workflows/unit_test.yaml b/.github/workflows/unit_test.yaml
index 36af07cc3..62f471fd3 100644
--- a/.github/workflows/unit_test.yaml
+++ b/.github/workflows/unit_test.yaml
@@ -12,7 +12,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        python-version: [3.6, 3.7, 3.8]
+        python-version: [3.6, 3.7, 3.8, 3.9]
         os: [ubuntu-18.04, macos-10.15, windows-2019]
 
     steps: