diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 14f82e2..7f666cb 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -2,20 +2,13 @@ name: CPP Semver CI
 on: [push, pull_request]
 
 jobs:
-  unix:
-    runs-on: ${{matrix.os}}
+  macos:
+    runs-on: macos-latest
     strategy:
       matrix:
         build: [Debug, Release]
-        os: [macos-latest, ubuntu-latest]
         compiler: [g++, clang++]
         std_version: [17, 20]
-        exclude:
-          - os: ubuntu-latest
-            compiler: clang++
-        include:
-          - os: ubuntu-latest
-            compiler: clang++-15
     name: ${{matrix.os}} ${{matrix.compiler}} ${{matrix.build}} std:${{matrix.std_version}}
     env:
       CXX: ${{ matrix.compiler }}
@@ -30,6 +23,27 @@ jobs:
       working-directory: build
       run: ctest -C ${{matrix.build}} -j4
 
+  linux:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        build: [ Debug, Release ]
+        compiler: [ g++, clang++-15 ]
+        std_version: [ 17, 20 ]
+    name: ${{matrix.os}} ${{matrix.compiler}} ${{matrix.build}} std:${{matrix.std_version}}
+    env:
+      CXX: ${{ matrix.compiler }}
+      CTEST_OUTPUT_ON_FAILURE: 1
+    steps:
+      - uses: actions/checkout@v3
+      - name: cmake
+        run: cmake -S . -B build -DCMAKE_BUILD_TYPE=${{matrix.build}} -DCMAKE_CXX_STANDARD=${{matrix.std_version}}
+      - name: build
+        run: cmake --build build --config ${{matrix.build}} --parallel 4
+      - name: test
+        working-directory: build
+        run: ctest -C ${{matrix.build}} -j4
+
   windows:
     runs-on: ${{matrix.os}}
     strategy: