diff --git a/rdf/tests.py b/rdf/tests.py
index 857dc05..2cdc5ea 100644
--- a/rdf/tests.py
+++ b/rdf/tests.py
@@ -1,6 +1,6 @@
 from future.standard_library import print_function
 import operator
-import types
+import types 
 import sys
 from rdflib import term, RDF, Namespace