diff --git a/testing/plugin/test_junitxml.py b/testing/plugin/test_junitxml.py
index d6ae6982c..f1e5ed164 100644
--- a/testing/plugin/test_junitxml.py
+++ b/testing/plugin/test_junitxml.py
@@ -222,6 +222,7 @@ class TestPython:
     def test_unicode(self, testdir):
         value = 'hx\xc4\x85\xc4\x87\n'
         testdir.makepyfile("""
+            # coding: utf-8
             def test_hello():
                 print (%r)
                 assert 0