diff --git a/tests/test_deduplicator.py b/tests/test_deduplicator.py
index 42da28fa..3b681070 100644
--- a/tests/test_deduplicator.py
+++ b/tests/test_deduplicator.py
@@ -7,6 +7,7 @@
 from nemo_curator._deduplicator import Deduplicator, _perform_removal
 from nemo_curator.datasets import DocumentDataset
 
+
 @pytest.fixture()
 def dummy_deduplicator():
     class TestDeduplicator(Deduplicator):
@@ -17,12 +18,13 @@ def __init__(self):
                 grouped_field="group",
                 cache_dir=None,
             )
+
         def identify(self, ds: DocumentDataset):
-            """ Dummy identify which marks all documents as duplicate """
+            """Dummy identify which marks all documents as duplicate"""
             df = ds.df.drop(columns=[self.text_field])
             df[self.grouped_field] = 0
             return DocumentDataset(df[[self.id_field, self.grouped_field]])
-            
+
     return TestDeduplicator()
 
 
@@ -112,13 +114,13 @@ def test_not_remove_unique(ids: list[str], sample_data: dd.DataFrame):
     assert set(ids[30:]).issubset(set(result["id"].tolist()))
 
 
-def test_deduplicator_class(dummy_deduplicator : Deduplicator):
+def test_deduplicator_class(dummy_deduplicator: Deduplicator):
     # Create sample dataframes with specific partition counts
-    df1 = dd.from_pandas(pd.DataFrame({
-        'id': ['a1', 'a2', 'a3'],
-        'text': ['text1', 'text2', 'text3']
-    }), npartitions=2)  # dataset with 2 partitions
-    
+    df1 = dd.from_pandas(
+        pd.DataFrame({"id": ["a1", "a2", "a3"], "text": ["text1", "text2", "text3"]}),
+        npartitions=2,
+    )  # dataset with 2 partitions
+
     dataset = DocumentDataset(df1)
     duplicates = dummy_deduplicator.identify(dataset)
     assert isinstance(duplicates, DocumentDataset)
@@ -128,17 +130,15 @@ def test_deduplicator_class(dummy_deduplicator : Deduplicator):
     assert isinstance(result, DocumentDataset)
     result = result.df.compute()
     assert len(result) == 1
-    assert list(result.columns) == ['id', 'text']
+    assert list(result.columns) == ["id", "text"]
 
     # Test that it raises ValueError when right npartitions are greater than left npartitions
     with pytest.raises(ValueError) as exc_info:
         dummy_deduplicator.remove(dataset, duplicates.repartition(npartitions=3))
-    
+
     expected_msg = (
         "The number of partitions in the dataset to remove duplicates from is less than "
         "the number of partitions in the duplicates dataset. This may lead to a shuffle "
         "join. Please re-read the datasets and call nemo_curator._deduplicat.perform_merge explicitly."
     )
     assert str(exc_info.value) == expected_msg
-
-