diff --git a/.github/workflows/CI.yml b/.github/workflows/CI.yml
index e35a440..94093ba 100644
--- a/.github/workflows/CI.yml
+++ b/.github/workflows/CI.yml
@@ -21,8 +21,9 @@ defaults:
   run:
     shell: bash
 
+
 jobs:
-  unit_tests_windows:
+  windows_msvc:
     strategy:
       fail-fast: false
       matrix:
@@ -44,7 +45,8 @@ jobs:
         working-directory: build
         run: ctest --verbose
 
-  unit_tests_msys2:
+
+  windows_msys2:
     defaults:
       run:
         shell: msys2 {0}
@@ -76,7 +78,8 @@ jobs:
         working-directory: build
         run: ctest --verbose
 
-  unit_tests_linux:
+
+  linux:
     strategy:
       fail-fast: false
       matrix:
@@ -90,9 +93,10 @@ jobs:
             docker_arch: i386
 
     name: linux ${{ matrix.arch }} ${{ matrix.action }} / C++${{ matrix.cxx-std }} / gcc)
-    runs-on: ubuntu-24.04
+    runs-on: ubuntu-latest
     container:
-      image: ${{ matrix.docker_arch }}/debian:latest
+      # replace with debian 13 (or latest) when available
+      image: ${{ matrix.docker_arch }}/debian:testing
       options: --user root
       volumes:
         - ${{ github.workspace }}:/workspace
@@ -123,7 +127,8 @@ jobs:
         working-directory: build
         run: valgrind --leak-check=full --show-leak-kinds=all --error-exitcode=1 ./unit_tests
 
-  unit_tests_macos:
+
+  macos:
     strategy:
       fail-fast: false
       matrix:
diff --git a/a b/a
new file mode 100644
index 0000000..c52c9d5
--- /dev/null
+++ b/a
@@ -0,0 +1,6 @@
+apt update
+apt install -y build-essential cmake valgrind
+cmake . -B build -DCMAKE_CXX_STANDARD=${{ matrix.cxx-std }} -DDYLIB_BUILD_TESTS=ON -DDYLIB_WARNING_AS_ERRORS=ON
+cmake --build build
+cd build
+valgrind --leak-check=full --show-leak-kinds=all --error-exitcode=1 ./unit_tests
\ No newline at end of file