diff --git a/.github/workflows/ctest.yml b/.github/workflows/ctest.yml
index 06d11abe..38e20dc7 100644
--- a/.github/workflows/ctest.yml
+++ b/.github/workflows/ctest.yml
@@ -29,8 +29,11 @@ jobs:
           - windows-latest
     runs-on: ${{ matrix.os }}
     steps:
+      # checkout full depth of history. 
       - uses: actions/checkout@v4
-      
+        with:
+          fetch-depth: 0
+        
       - name: Run Linux Build
         if: matrix.os == 'ubuntu-latest'
         run: echo "Ubuntu Latest" > release_ubuntu