diff --git a/spacy/tests/regression/test_issue1506.py b/spacy/tests/regression/test_issue1506.py
index 338126d3a..f3ebbe04b 100644
--- a/spacy/tests/regression/test_issue1506.py
+++ b/spacy/tests/regression/test_issue1506.py
@@ -35,4 +35,7 @@ def test_issue1506():
             del anchor
             gc.collect()
 
+        for t in d:
+            str(t.lemma_)
+
     assert remember.text == 'Oh snap.'