diff --git a/spacy/tests/regression/test_issue5230.py b/spacy/tests/regression/test_issue5230.py
index be84875e7..9cfa3fc05 100644
--- a/spacy/tests/regression/test_issue5230.py
+++ b/spacy/tests/regression/test_issue5230.py
@@ -1,3 +1,4 @@
+# coding: utf8
 import warnings
 
 import numpy