diff --git a/.github/workflows/ctest.yml b/.github/workflows/ctest.yml
index 736bafb3..afa88013 100644
--- a/.github/workflows/ctest.yml
+++ b/.github/workflows/ctest.yml
@@ -16,7 +16,7 @@ jobs:
       fail-fast: false
 
       matrix:
-        os: [ubuntu-latest, windows-latest, macos-latest]
+        os: [ubuntu-latest, windows-latest, macos-13]
         build_type: [Debug, Release]
         c_compiler: [gcc, clang, cl]
         bit7z_auto_format: [OFF, ON]
@@ -39,7 +39,7 @@ jobs:
             c_compiler: clang
             cpp_compiler: clang++
             use_system_7zip: OFF
-          - os: macos-latest
+          - os: macos-13
             c_compiler: clang
             cpp_compiler: clang++
             use_system_7zip: OFF
@@ -63,17 +63,17 @@ jobs:
             bit7z_use_system_codepage: ON
           - os: ubuntu-latest
             bit7z_path_sanitization: ON
-          - os: macos-latest
+          - os: macos-13
             c_compiler: cl
-          - os: macos-latest
+          - os: macos-13
             c_compiler: gcc
-          - os: macos-latest
+          - os: macos-13
             bit7z_use_native_string: ON
-          - os: macos-latest
+          - os: macos-13
             bit7z_auto_prefix_long_paths: ON
-          - os: macos-latest
+          - os: macos-13
             bit7z_use_system_codepage: ON
-          - os: macos-latest
+          - os: macos-13
             bit7z_path_sanitization: ON
 
     steps:
@@ -129,9 +129,10 @@ jobs:
         
     - name: Build 7z.so for tests (macOS)
       shell: bash
-      if: matrix.os == 'macos-latest'
+      if: matrix.os == 'macos-13'
       run: |
         git clone --depth 1 https://github.com/rikyoz/7-Zip ${{ github.workspace }}/../7-zip
+        sed -i '' 's/-Wno-poison-system-directories/-Wno-poison-system-directories -Wno-declaration-after-statement\r/' ${{ github.workspace }}/../7-zip/CPP/7zip/warn_clang_mac.mak
         cd ${{ github.workspace }}/../7-zip/CPP/7zip/Bundles/Format7zF/
         make -j -f ../../cmpl_mac_x64.mak
         cp b/m_x64/7z.so ${{ github.workspace }}/bin/x64/7z.so