diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 13e077e1..d421d5f2 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -5,7 +5,7 @@ jobs:
 
     strategy:
       matrix:
-        os: [ubuntu-latest, macos-latest]
+        os: [ubuntu-latest, macos-latest, windows-latest]
         php: ['7.3', '7.4', '8.0']
         dependency-version: [prefer-stable]