diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 55ea8455..75c6b53f 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -20,3 +20,18 @@ jobs:
         cache: 'pip'
     - run: make dev
     - run: make test
+
+  format:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        python: ["3.12"]
+    steps:
+    - uses: actions/checkout@v4
+    - name: Set up Python ${{ matrix.python }}
+      uses: actions/setup-python@v4
+      with:
+        python-version: ${{ matrix.python }}
+        cache: 'pip'
+    - run: make dev
+    - run: make fmt-check
diff --git a/Makefile b/Makefile
index c98443dd..16bfebd6 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,4 @@
-.PHONY: install test typecheck unittest dev fmt generate clean update-proto coverage
+.PHONY: install test typecheck unittest dev fmt fmt-check generate clean update-proto coverage
 
 PYTHON := python
 
@@ -14,6 +14,11 @@ fmt:
 	$(PYTHON) -m isort .
 	$(PYTHON) -m black .
 
+fmt-check:
+	@$(PYTHON) -m isort . --check --diff; isort_status=$$?; \
+	$(PYTHON) -m black . --check --diff; black_status=$$?; \
+    exit $$((isort_status + black_status))
+
 typecheck:
 	$(PYTHON) -m mypy src tests