diff --git a/.github/workflows/cmake.yml b/.github/workflows/cmake.yml
index fb9dc3f..4ea7107 100644
--- a/.github/workflows/cmake.yml
+++ b/.github/workflows/cmake.yml
@@ -15,7 +15,12 @@ jobs:
     # The CMake configure and build commands are platform agnostic and should work equally well on Windows or Mac.
     # You can convert this to a matrix build if you need cross-platform coverage.
     # See: https://docs.github.com/en/free-pro-team@latest/actions/learn-github-actions/managing-complex-workflows#using-a-build-matrix
-    runs-on: windows-latest
+    runs-on: ${{matrix.os}}
+    strategy: 
+      fail-fast: false
+      matrix:
+        os: [windows-latest, ubuntu-latest]
+        BUILD_TYPE: [Debug, Release]
 
     steps:
     - uses: actions/checkout@v3
@@ -23,15 +28,15 @@ jobs:
     - name: Configure CMake
       # Configure CMake in a 'build' subdirectory. `CMAKE_BUILD_TYPE` is only required if you are using a single-configuration generator such as make.
       # See https://cmake.org/cmake/help/latest/variable/CMAKE_BUILD_TYPE.html?highlight=cmake_build_type
-      run: cmake -B ${{github.workspace}}/build -DCMAKE_BUILD_TYPE=${{env.BUILD_TYPE}}
+      run: cmake -B ${{github.workspace}}/build -DCMAKE_BUILD_TYPE=${{matrix.BUILD_TYPE}}
 
     - name: Build
       # Build your program with the given configuration
-      run: cmake --build ${{github.workspace}}/build --config ${{env.BUILD_TYPE}}
+      run: cmake --build ${{github.workspace}}/build --config ${{matrix.BUILD_TYPE}}
 
     - name: Test
       working-directory: ${{github.workspace}}/build
       # Execute tests defined by the CMake configuration.
       # See https://cmake.org/cmake/help/latest/manual/ctest.1.html for more detail
-      run: ctest -C ${{env.BUILD_TYPE}}
+      run: ctest -C ${{matrix.BUILD_TYPE}}
 
diff --git a/src/main.cpp b/src/main.cpp
index 8db3074..1e9630d 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -2,7 +2,6 @@
 
 auto main() -> int
 {
-    int
 	printf("Hello, World!");
 	return 0;
 }