diff --git a/graphene_django/utils/tests/test_str_converters.py b/graphene_django/utils/tests/test_str_converters.py
index fc466f6..24064b2 100644
--- a/graphene_django/utils/tests/test_str_converters.py
+++ b/graphene_django/utils/tests/test_str_converters.py
@@ -7,4 +7,4 @@ def test_to_const():
 
 
 def test_to_const_unicode():
-    assert to_const("Skoða þetta unicode stöff") == "SKODA_THETTA_UNICODE_STOFF"
+    assert to_const(u"Skoða þetta unicode stöff") == "SKODA_THETTA_UNICODE_STOFF"