diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index d9f56dc..26d6f1a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -24,6 +24,9 @@ jobs:
       - name: poetry install
         run: poetry install --no-interaction --extras=training
 
+      - name: black
+        run: poetry run black --check .
+
       - name: lint
         run: poetry run ruff check .
 
diff --git a/tests/conftest.py b/tests/conftest.py
index cf7a28b..decf97f 100644
--- a/tests/conftest.py
+++ b/tests/conftest.py
@@ -24,6 +24,7 @@ def test_weights_path() -> Path:
 def test_e2e_path() -> Path:
     return PARENT_PATH / "e2e"
 
+
 @fixture(scope="session")
 def test_textual_inversion_path() -> Path:
     return PARENT_PATH / "foundationals" / "clip" / "test_concepts_ref"
diff --git a/tests/foundationals/clip/test_concepts.py b/tests/foundationals/clip/test_concepts.py
index 6df3e07..aed634d 100644
--- a/tests/foundationals/clip/test_concepts.py
+++ b/tests/foundationals/clip/test_concepts.py
@@ -41,8 +41,10 @@ def our_encoder_with_new_concepts(
 
 
 @pytest.fixture(scope="module")
-def ref_sd15_with_new_concepts(runwayml_weights_path: Path, test_textual_inversion_path: Path, test_device: torch.device):
-    pipe = StableDiffusionPipeline.from_pretrained(runwayml_weights_path, torch_dtype=torch.float16).to(test_device) # type: ignore
+def ref_sd15_with_new_concepts(
+    runwayml_weights_path: Path, test_textual_inversion_path: Path, test_device: torch.device
+):
+    pipe = StableDiffusionPipeline.from_pretrained(runwayml_weights_path, torch_dtype=torch.float16).to(test_device)  # type: ignore
     pipe.load_textual_inversion(test_textual_inversion_path / "cat-toy")  # type: ignore
     pipe.load_textual_inversion(test_textual_inversion_path / "gta5-artwork")  # type: ignore
     return pipe