diff --git a/.github/workflows/windows.yml b/.github/workflows/windows.yml
index e64249bf5b..38f7193b0f 100644
--- a/.github/workflows/windows.yml
+++ b/.github/workflows/windows.yml
@@ -23,11 +23,9 @@ jobs:
               -DCMAKE_BUILD_TYPE=Debug    `
               -DopenPMD_USE_MPI=OFF
         cmake --build build --config Debug --parallel 2
+        ctest --test-dir build -C Debug --output-on-failure
         cmake --build build --config Debug --target install
 
-# add before install, and fix Python path:
-# ctest --test-dir build -C Debug --output-on-failure
-
 
   build_win_clang:
     name: Clang w/o MPI
@@ -48,10 +46,8 @@ jobs:
               -G "Ninja"      ^
               -DCMAKE_C_COMPILER=clang-cl   ^
               -DCMAKE_CXX_COMPILER=clang-cl ^
-              -DCMAKE_BUILD_TYPE=Release    ^
+              -DCMAKE_BUILD_TYPE=RelWithDebInfo  ^
               -DopenPMD_USE_MPI=OFF
-        cmake --build build --config Release --parallel 2
-        cmake --build build --config Debug --target install
-
-# add before install, and fix Python path:
-# ctest --test-dir build -C Debug --output-on-failure
+        cmake --build build --config RelWithDebInfo --parallel 2
+        ctest --test-dir build -C RelWithDebInfo --output-on-failure
+        cmake --build build --config RelWithDebInfo --target install