diff --git a/gensim/test/test_BM25.py b/gensim/test/test_BM25.py
index f9fc28d35b..b6575cddb2 100644
--- a/gensim/test/test_BM25.py
+++ b/gensim/test/test_BM25.py
@@ -16,35 +16,33 @@
 
 
 class TestBM25(unittest.TestCase):
-	
-	def test_max_match_with_itself(self) :
-		""" Document should show maximum matching with itself """
-		weights = get_bm25_weights(common_texts)
-		for index,doc_weights in enumerate(weights) :
-			expected = max(doc_weights)
-			predicted = doc_weights[index]
-			self.assertEqual(expected , predicted)
-
-	def test_nonnegative_weights(self):
-		""" All the weights for a partiular document should be non negative """
-		weights = get_bm25_weights(common_texts)
-		self.assertTrue(min(weights)>=0)
-
-	def test_same_match_with_same_document(self):
-		""" A document should always get the same weight when matched with a particular document """
-		corpus = [['cat','dog','mouse'] , ['cat','lion'] , ['cat','lion']]
-		weights = get_bm25_weights(corpus)
-		self.assertEqual(weights[0][1],weights[0][2])
-
-	def test_disjoint_docs_if_weight_zero(self):
-		""" Two disjoint documents should have zero matching"""
-		corpus = [['cat','dog','lion'] , ['goat','fish','tiger']]
-		weights = get_bm25_weights(corpus)
-		self.assertTrue(weights[0][1]==0)
-		self.assertTrue(weights[1][0]==0)
-
-if __name__ == '__main__':
-	logging.basicConfig(level=logging.DEBUG)
-	unittest.main()
+    def test_max_match_with_itself(self):
+        """ Document should show maximum matching with itself """
+        weights = get_bm25_weights(common_texts)
+        for index, doc_weights in enumerate(weights):
+            expected = max(doc_weights)
+            predicted = doc_weights[index]
+            self.assertEqual(expected, predicted)
+
+    def test_nonnegative_weights(self):
+        """ All the weights for a partiular document should be non negative """
+        weights = get_bm25_weights(common_texts)
+        self.assertTrue(min(weights) >= 0)
+
+    def test_same_match_with_same_document(self):
+        """ A document should always get the same weight when matched with a particular document """
+        corpus = [['cat', 'dog', 'mouse'], ['cat', 'lion'], ['cat', 'lion']]
+        weights = get_bm25_weights(corpus)
+        self.assertEqual(weights[0][1], weights[0][2])
+
+    def test_disjoint_docs_if_weight_zero(self):
+        """ Two disjoint documents should have zero matching"""
+        corpus = [['cat', 'dog', 'lion'], ['goat', 'fish', 'tiger']]
+        weights = get_bm25_weights(corpus)
+        self.assertTrue(weights[0][1] == 0)
+        self.assertTrue(weights[1][0] == 0)
 
 
+if __name__ == '__main__':
+    logging.basicConfig(level=logging.DEBUG)
+    unittest.main()