diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 24034272f4..c72274dcaa 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -141,6 +141,8 @@ jobs:
       run: pip freeze
 
     - name: Run tests
+      env:
+        COVERAGE_PARALLEL: True
       run: >
         pytest
         -m "not fuzzing"
@@ -204,6 +206,8 @@ jobs:
       run: curl --location "https://raw.githubusercontent.com/vyperlang/vyper-test-durations/master/test_durations" -o .test_durations
 
     - name: Run tests
+      env:
+        COVERAGE_PARALLEL: True
       run: |
         pytest \
           -m "fuzzing" \