diff --git a/test/test_thumbnails.py b/test/test_thumbnails.py
index 0454ae0d7..fe1c80f4a 100644
--- a/test/test_thumbnails.py
+++ b/test/test_thumbnails.py
@@ -273,20 +273,15 @@ class ThumbnailsTest(unittest.TestCase, TestHelper):
 
     def test_uri(self):
         gio = GioURI()
-        plib = PathlibURI()
         if not gio.available:
             self.skipTest(u"GIO library not found")
 
         self.assertEqual(gio.uri(u"/foo"), b"file:///")  # silent fail
         self.assertEqual(gio.uri(b"/foo"), b"file:///foo")
         self.assertEqual(gio.uri(b"/foo!"), b"file:///foo!")
-        self.assertEqual(plib.uri(b"/foo!"), b"file:///foo%21")
         self.assertEqual(
             gio.uri(b'/music/\xec\x8b\xb8\xec\x9d\xb4'),
             b'file:///music/%EC%8B%B8%EC%9D%B4')
-        self.assertEqual(
-            plib.uri(b'/music/\xec\x8b\xb8\xec\x9d\xb4'),
-            b'file:///music/%EC%8B%B8%EC%9D%B4')
 
 
 def suite():