diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index d316829..0d7bfef 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -33,6 +33,9 @@ jobs:
       - name: Build package
         run: pip install -e .
 
+      - name: Check formatting
+        run: black --check fuzzytree examples
+
       - name: Run tests
         run: pytest fuzzytree