diff --git a/.github/workflows/test-future.yml b/.github/workflows/test-future.yml
index 9b24c7766..b05c74c32 100644
--- a/.github/workflows/test-future.yml
+++ b/.github/workflows/test-future.yml
@@ -31,3 +31,10 @@ jobs:
       - name: Test with pytest
         run: |
           pytest
+      - name: Note a possible Black incompatibility and required actions
+        if: failure()
+        run: |
+          echo "### :x: Black incompatibility? :x: " >>$GITHUB_STEP_SUMMARY
+          echo "" >>$GITHUB_STEP_SUMMARY
+          echo "See [#382](/akaihola/darker/issues/382)" >>$GITHUB_STEP_SUMMARY
+          echo "for possible required actions" >> $GITHUB_STEP_SUMMARY