Fix cache info assertion

.github/actions/test/action.yml

@@ -82,7 +82,11 @@ runs:
         python3 -m pip cache list || true
 
         # assert no whl files have been built
-        python3 -m pip cache info | grep "Locally built wheels size:" | (! grep -v "Locally built wheels size: 0")
+        if [ "$(python3 -m pip cache info | grep "Number of locally built wheels:")" != "Number of locally built wheels: 0" ]
+        then
+          echo "Dependency whl files have been built"
+          exit 1
+        fi
       shell: bash
 
     - name: Update expectation files