GA: Add config to ctest.
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 9721c7f..572e56c 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -35,12 +35,18 @@
         if: ${{ runner.os == 'Windows' }}
         working-directory: ${{runner.workspace}}/build
         run: |
-          cmake -DCMAKE_TOOLCHAIN_FILE=${{env.VCPKG_ROOT}}/scripts/buildsystems/vcpkg.cmake ${{github.workspace}}
+          cmake -DCMAKE_TOOLCHAIN_FILE=${{env.VCPKG_ROOT}}/scripts/buildsystems/vcpkg.cmake --config Release ${{github.workspace}}
       - name: build
         working-directory: ${{runner.workspace}}/build
         run: |
           cmake --build .
-      - name: test
+      - name: test (Unix)
+        if: ${{ runner.os != 'Windows' }}
         working-directory: ${{runner.workspace}}/build
         run: |
           ctest -v
+      - name: test (Windows)
+        if: ${{ runner.os == 'Windows' }}
+        working-directory: ${{runner.workspace}}/build
+        run: |
+          ctest -v --config Release