diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 12c6aeab..516697be 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -33,8 +33,6 @@ jobs:
         env:
           cache-name: cache-artifacts
           CI: true
-          JULIA_NUM_THREADS: 2
-          PYTHON: ""
         with:
           path: ~/.julia/artifacts
           key: ${{ runner.os }}-test-${{ env.cache-name }}-${{ hashFiles('**/Project.toml') }}
@@ -44,6 +42,9 @@ jobs:
             ${{ runner.os }}-
       - uses: julia-actions/julia-buildpkg@v1
       - uses: julia-actions/julia-runtest@v1
+        env:
+          PYTHON: ""
+          JULIA_NUM_THREADS: "2"
       - uses: julia-actions/julia-processcoverage@v1
       - uses: codecov/codecov-action@v1
         with: