diff --git a/.github/workflows/coverage.yml b/.github/workflows/coverage.yml
index 3ba64d0..7868aab 100644
--- a/.github/workflows/coverage.yml
+++ b/.github/workflows/coverage.yml
@@ -20,8 +20,6 @@ jobs:
         uses: taiki-e/install-action@cargo-llvm-cov
       - name: Generate code coverage
         run: cargo llvm-cov --all-features --lcov --output-path lcov.info
-        env:
-          TEST_HOST: greenmail
       - name: Upload to codecov.io
         uses: codecov/codecov-action@v2
         with: