diff --git a/.github/workflows/test-python.yml b/.github/workflows/test-python.yml
index befd93ed..f3aef0ea 100644
--- a/.github/workflows/test-python.yml
+++ b/.github/workflows/test-python.yml
@@ -97,7 +97,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: [macos-10.15, windows-2019, ubuntu-20.04]
+        os: [macos-11, windows-2019, ubuntu-20.04]
     steps:
     - name: Checkout
       uses: actions/checkout@v2