diff --git a/tests/pretty_format_json_test.py b/tests/pretty_format_json_test.py
index 59a87f0..7fda23b 100644
--- a/tests/pretty_format_json_test.py
+++ b/tests/pretty_format_json_test.py
@@ -67,16 +67,16 @@
     srcfile = tmpdir.join('to_be_json_formatted.json')
     shutil.copyfile(
         get_resource_path('not_pretty_formatted_json.json'),
-        srcfile.strpath,
+        str(srcfile),
     )
 
     # now launch the autofix on that file
-    ret = main(['--autofix', srcfile.strpath])
+    ret = main(['--autofix', str(srcfile)])
     # it should have formatted it
     assert ret == 1
 
     # file was formatted (shouldn't trigger linter again)
-    ret = main([srcfile.strpath])
+    ret = main([str(srcfile)])
     assert ret == 0