diff --git a/merkly/mtree.py b/merkly/mtree.py
index cf26fac..635e908 100644
--- a/merkly/mtree.py
+++ b/merkly/mtree.py
@@ -179,24 +179,24 @@ def verify_proof(proof: List[Node], raw_leaf: str, root: str, **kwargs) -> bool:
         """
         Verify the validity of a Merkle proof for a given leaf against the expected root hash.
 
-        This method checks whether the provided proof can reconstruct the root hash 
-        from the given raw leaf data. It uses the specified hash function to compute 
+        This method checks whether the provided proof can reconstruct the root hash
+        from the given raw leaf data. It uses the specified hash function to compute
         the hashes along the proof path.
 
         Args:
-            proof (List[Node]): A list of Nodes representing the Merkle proof. Each Node 
+            proof (List[Node]): A list of Nodes representing the Merkle proof. Each Node
                 contains the hash of a sibling node and its position (left or right) in the tree.
-            raw_leaf (str): The raw leaf data (in string format) for which the proof is 
+            raw_leaf (str): The raw leaf data (in string format) for which the proof is
                 being verified. This data should correspond to a leaf in the Merkle tree.
-            root (str): The expected root hash (in hexadecimal string format) that the 
+            root (str): The expected root hash (in hexadecimal string format) that the
                 proof should reconstruct if valid.
             **kwargs: Optional keyword arguments. Can include:
-                - hash_function (Callable[[bytes, bytes], bytes]): A custom hash function 
-                  that takes two byte inputs and returns a hash. If not provided, 
+                - hash_function (Callable[[bytes, bytes], bytes]): A custom hash function
+                  that takes two byte inputs and returns a hash. If not provided,
                   the default `keccak` function is used.
 
         Returns:
-            bool: Returns True if the proof is valid and reconstructs the expected root 
+            bool: Returns True if the proof is valid and reconstructs the expected root
                   hash; otherwise, returns False.
 
         Example:
diff --git a/test/merkle_proof/test_merkle_proof.py b/test/merkle_proof/test_merkle_proof.py
index 88471a1..5213abf 100644
--- a/test/merkle_proof/test_merkle_proof.py
+++ b/test/merkle_proof/test_merkle_proof.py
@@ -90,6 +90,8 @@ def test_verify_merkle_proof_without_leaves():
     assert not invalid_result, "Expected proof to be invalid for incorrect leaf"
 
     # Test with a different root
-    different_root = "0x1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcdef"
+    different_root = (
+        "0x1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcdef"
+    )
     different_result = MerkleTree.verify_proof(proof, leaf, different_root)
     assert not different_result, "Expected proof to be invalid for different root"