diff --git a/.github/workflows/test-build.yml b/.github/workflows/test-build.yml
index 886b23d36..f9574594a 100644
--- a/.github/workflows/test-build.yml
+++ b/.github/workflows/test-build.yml
@@ -163,11 +163,15 @@ jobs:
 
   test-cells:
     name: Run test_cell
-    runs-on: ubuntu-latest
+    runs-on: ${{ matrix.os }}
     needs: [build-yosys, pre_job]
     if: needs.pre_job.outputs.should_skip != 'true'
     env:
       CC: clang
+    strategy:
+      matrix:
+        os: [ubuntu-latest]
+        sanitizer: [undefined]
     steps:
       - name: Checkout Yosys
         uses: actions/checkout@v4
@@ -180,7 +184,7 @@ jobs:
       - name: Download build artifact
         uses: actions/download-artifact@v4
         with:
-          name: build-ubuntu-latest
+          name: build-${{ matrix.os }}-${{ matrix.sanitizer }}
 
       - name: Uncompress build
         shell: bash