diff --git a/.github/workflows/ccp-workflow.yml b/.github/workflows/ccp-workflow.yml
index d691a69..9b38890 100644
--- a/.github/workflows/ccp-workflow.yml
+++ b/.github/workflows/ccp-workflow.yml
@@ -8,15 +8,11 @@ jobs:
     strategy:
       matrix:
         include: [
-          { system: MINGW64, runner: windows-2022 },
-          { system: MINGW32, runner: windows-2022 },
-          { system: UCRT64,  runner: windows-2022 },
-          { system: CLANG64, runner: windows-2022 },
-          { system: CLANG32, runner: windows-2022 },
-          { system: MACOS,   runner: macos-latest },
-          { system: UBUNTU,  runner: ubuntu-latest },
+          { system: MacOS,          runner: macos-latest },
+          { system: Ubuntu-20,      runner: ubuntu-20.04 },
+          { system: Ubuntu-latest,  runner: ubuntu-latest },
         ]
-    name: ${{ matrix.system }}
+    name: ${{ matrix.system }} Build
     runs-on: ${{ matrix.runner }}
     steps:
     - uses: actions/checkout@v3
@@ -28,11 +24,14 @@ jobs:
       working-directory: build
 
   test:
-    name: tests on Linux and MacOS
-    runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [macos-latest, ubuntu-latest]
+        include: [
+          { system: MacOS,          runner: macos-latest },
+          { system: Ubuntu-latest,  runner: ubuntu-latest },
+        ]
+    name: ${{ matrix.system }} Test
+    runs-on: ${{ matrix.runner }}
     steps:
     - uses: actions/checkout@v3
     - name: cmake
@@ -46,11 +45,13 @@ jobs:
       working-directory: build
       
   test_windows:
-    name: tests on Windows
-    runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        os: [windows-latest]
+        include: [
+          { system: Windows,  runner: windows-latest },
+        ]
+    name: ${{ matrix.system }} Test
+    runs-on: ${{ matrix.runner }}
     steps:
     - uses: actions/checkout@v3
     - name: cmake