diff --git a/test/test_issue535.py b/test/test_issue535.py
index 15c6d0d39..2799fc027 100644
--- a/test/test_issue535.py
+++ b/test/test_issue535.py
@@ -1,5 +1,4 @@
 from rdflib import ConjunctiveGraph, URIRef
-from rdflib.parser import StringInputSource
 
 def test_nquads_default_graph():
     ds = ConjunctiveGraph()