diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 6861f6b..bd775c9 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -54,7 +54,7 @@ jobs:
       - run: bundle exec rake build
 
       - run: bundle exec rake test
-        continue-on-error: ${{ matrix.ignore-error }}
+        continue-on-error: ${{ matrix.ignore-error || false }}
 
       - name: Integration test
         run: bundle exec rake check