diff --git a/src/tests/test_hashtree.py b/src/tests/test_hashtree.py
--- a/src/tests/test_hashtree.py
+++ b/src/tests/test_hashtree.py
@@ -8,24 +8,24 @@ from . import RedirectedOutput
 random.seed(17)
 
 
-def buildTree(leaves):
+def build_tree(leaves):
 	tree = HashTree(len(leaves))
 	for l in leaves:
-		tree.insertLeaf(l)
-	tree.buildTree()
+		tree.insert_leaf(l)
+	tree.build_tree()
 	return tree
 
 
 class TestMorevna(RedirectedOutput, TestCase):
-	def test_batchUpdate(self):
+	def test_batch_update(self):
 		leaves = [b"a" for i in range(8)]
-		t1 = buildTree(leaves)
+		t1 = build_tree(leaves)
 		keys = list(range(8))
 
 		for i in range(8):
 			random.shuffle(keys)
 			for k in keys[:i+1]:
 				leaves[k] = bytes([random.randrange(256)])
-			t2 = buildTree(leaves)
-			t1.batchUpdate((k+t1.leafStart, leaves[k]) for k in keys[:i+1])
+			t2 = build_tree(leaves)
+			t1.batch_update((k + t1.leaf_start, leaves[k]) for k in keys[:i + 1])
 			self.assertEqual(t1.store, t2.store)