Don't use LocalPath.strpath
diff --git a/tests/check_byte_order_marker_test.py b/tests/check_byte_order_marker_test.py
index 9995200..4c40247 100644
--- a/tests/check_byte_order_marker_test.py
+++ b/tests/check_byte_order_marker_test.py
@@ -4,10 +4,10 @@
 def test_failure(tmpdir):
     f = tmpdir.join('f.txt')
     f.write_text('ohai', encoding='utf-8-sig')
-    assert check_byte_order_marker.main((f.strpath,)) == 1
+    assert check_byte_order_marker.main((str(f),)) == 1
 
 
 def test_success(tmpdir):
     f = tmpdir.join('f.txt')
     f.write_text('ohai', encoding='utf-8')
-    assert check_byte_order_marker.main((f.strpath,)) == 0
+    assert check_byte_order_marker.main((str(f),)) == 0