diff --git a/.github/workflows/windows.yml b/.github/workflows/windows.yml
index 04fc2f6d..e4fe7bdb 100644
--- a/.github/workflows/windows.yml
+++ b/.github/workflows/windows.yml
@@ -19,10 +19,15 @@ jobs:
     - name: Build ninja
       shell: bash
       run: |
-        cmake -DCMAKE_BUILD_TYPE=Release -B build
+        cmake -Bbuild
+        cmake --build build --parallel --config Debug
         cmake --build build --parallel --config Release
 
-    - name: Test ninja
+    - name: Test ninja (Debug)
+      run: .\ninja_test.exe
+      working-directory: build/Debug
+
+    - name: Test ninja (Release)
       run: .\ninja_test.exe
       working-directory: build/Release