diff --git a/.github/workflows/runtests.yml b/.github/workflows/runtests.yml
index b8286abf..ac415e57 100644
--- a/.github/workflows/runtests.yml
+++ b/.github/workflows/runtests.yml
@@ -64,6 +64,7 @@ jobs:
         with:
           cache-name: julia-cache;workflow=${{ github.workflow }};julia=${{ matrix.julia-version }};arch=${{ runner.arch }}
           include-matrix: false
+          cache-scratchspaces: false
       - name: "pin CxxWrap"
         if: matrix.cxxwrap != ''
         run: julia --project -e 'using Pkg; pkg"add CxxWrap@${{ matrix.cxxwrap }}"; pkg"pin CxxWrap";'
@@ -112,6 +113,7 @@ jobs:
         with:
           cache-name: julia-cache;workflow=${{ github.workflow }};julia=${{ matrix.julia-version }};arch=${{ runner.arch }}
           include-matrix: false
+          cache-scratchspaces: false
       - uses: julia-actions/julia-runtest@v1
       - uses: julia-actions/julia-processcoverage@v1
       - uses: codecov/codecov-action@v4