diff --git a/test/test_ui.py b/test/test_ui.py
index c67c9cb55..0fbec0bde 100644
--- a/test/test_ui.py
+++ b/test/test_ui.py
@@ -481,8 +481,6 @@ class ExportTest(_common.TestCase):
     def setUp(self):
         super(ExportTest, self).setUp()
 
-        self.io.install()
-
         self.libdir = os.path.join(self.temp_dir, b'testlibdir')
         os.mkdir(self.libdir)