diff --git a/.github/workflows/unittest.yml b/.github/workflows/unittest.yml
index 738174a..682cb79 100644
--- a/.github/workflows/unittest.yml
+++ b/.github/workflows/unittest.yml
@@ -26,6 +26,17 @@ jobs:
             julia --project=lr -e '
               using Pkg
               Pkg.develop(PackageSpec(path="/home/runner/work/LinearResponse.jl/LinearResponse.jl"))'
+            julia --project=lr test/runtests.jl
+      - uses: actions/cache@v1
+        env:
+          cache-name: cache-artifacts
+        with:
+          path: ~/.julia/artifacts
+          key: ${{ runner.os }}-test-${{ env.cache-name }}-${{ hashFiles('**/Project.toml') }}
+          restore-keys: |
+            ${{ runner.os }}-test-${{ env.cache-name }}-
+            ${{ runner.os }}-test-
+            ${{ runner.os }}-
       - uses: julia-actions/julia-runtest@v1
       - uses: julia-actions/julia-processcoverage@v1
       - uses: codecov/codecov-action@v1