diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 031f8c6..b6dd537 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -21,7 +21,7 @@ jobs:
           - ruby: mingw
             os: windows-latest
           - ruby: mswin
-            os: windows-latest
+            os: windows-2019
     runs-on: ${{ matrix.os }}
     steps:
     - uses: actions/checkout@v2