diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 1ac69bf4a3..5481df6286 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -159,7 +159,7 @@ jobs:
         uses: "codecov/codecov-action@v2.0.3"
         with:
           file: ./.tox/coverage.xml
-          fail_ci_if_error: false
+          fail_ci_if_error: true
 
   # Mutation testing jobs ------------------------
   test-mutations: