diff --git a/moto/dynamodb2/responses.py b/moto/dynamodb2/responses.py
index c6dd094ae..46cfaa239 100644
--- a/moto/dynamodb2/responses.py
+++ b/moto/dynamodb2/responses.py
@@ -481,7 +481,9 @@ class DynamoHandler(BaseResponse):
                     ]
                 elif "begins_with" in range_key_expression:
                     range_comparison = "BEGINS_WITH"
-                    range_values = [value_alias_map[range_key_expression_components[-1]]]
+                    range_values = [
+                        value_alias_map[range_key_expression_components[-1]]
+                    ]
                 else:
                     range_values = [value_alias_map[range_key_expression_components[2]]]
             else: