diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 8914546..963c308 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -19,8 +19,8 @@ jobs:
           - 'ubuntu-20.04'
           - 'ubuntu-18.04'
           - 'ubuntu-16.04'
-          - 'macos-latest'
-          - 'windows-latest'
+          - 'macos-10.15'  # macos-latest
+          - 'windows-2019' # windows-latest
     steps:
       - uses: actions/checkout@v2.3.1