diff --git a/KorAPClient/tests/test_korapclient.py b/KorAPClient/tests/test_korapclient.py
index 34a52fa..6e25013 100644
--- a/KorAPClient/tests/test_korapclient.py
+++ b/KorAPClient/tests/test_korapclient.py
@@ -8,7 +8,7 @@
 
     def test_query(self):
         q = self.kcon.corpusQuery("Test")
-        self.assertEqual(q.slots['class'], 'KorAPQuery')
+        self.assertEqual(q.slots['class'][0], 'KorAPQuery')
 
     def test_frequency_query(self):
         df = self.kcon.frequencyQuery("Ameisenplage")