diff --git a/qa/python_models/bls/model.py b/qa/python_models/bls/model.py
index 423b1dfd1fa..b6510e75a1a 100644
--- a/qa/python_models/bls/model.py
+++ b/qa/python_models/bls/model.py
@@ -466,7 +466,7 @@ def test_multiprocess(self):
             func_name = bls_add_sub
 
             pool = Pool(10)
-            pool.map(func_name, [1,2,3,4,5,6,7,8,9,10])
+            pool.map(func_name, [1, 2, 3, 4, 5, 6, 7, 8, 9, 10])
             pool.close()
             pool.join()