diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 5ed6d59d..bb160f5c 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -198,3 +198,7 @@ jobs:
       - name: "Run Build Tests (build - embed for non-windows)"
         if: ${{ !startsWith(matrix.os, 'windows-') }}
         run: php src/globals/test-extensions.php build_embed_cmd ${{ matrix.os }} ${{ matrix.php }}
+
+      - name: Setup tmate session
+        if: ${{ failure() }}
+        uses: mxschmitt/action-tmate@v3
diff --git a/src/globals/test-extensions.php b/src/globals/test-extensions.php
index 417b3b67..1d0df8de 100644
--- a/src/globals/test-extensions.php
+++ b/src/globals/test-extensions.php
@@ -21,14 +21,14 @@ $test_php_version = [
 
 // test os (macos-13, macos-14, macos-15, ubuntu-latest, windows-latest are available)
 $test_os = [
-    'macos-13', // bin/spc for x86_64
-    'macos-14',  // bin/spc for arm64
-    'macos-15', // bin/spc for arm64
+    // 'macos-13', // bin/spc for x86_64
+    // 'macos-14',  // bin/spc for arm64
+    // 'macos-15', // bin/spc for arm64
     'ubuntu-latest', // bin/spc-alpine-docker for x86_64
-    'ubuntu-22.04', // bin/spc-gnu-docker for x86_64
-    'ubuntu-24.04', // bin/spc for x86_64
-    'ubuntu-22.04-arm', // bin/spc-gnu-docker for arm64
-    'ubuntu-24.04-arm', // bin/spc for arm64
+    // 'ubuntu-22.04', // bin/spc-gnu-docker for x86_64
+    // 'ubuntu-24.04', // bin/spc for x86_64
+    // 'ubuntu-22.04-arm', // bin/spc-gnu-docker for arm64
+    // 'ubuntu-24.04-arm', // bin/spc for arm64
     // 'windows-latest', // .\bin\spc.ps1
 ];