diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 07af5629..94ebc690 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -6,7 +6,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [ubuntu-20.04, macos-11.0]
+        os: [ubuntu-20.04, macos-10.15]
         rust-version: [stable, beta]
     steps:
       - name: Checkout sources