TST: don't look in user site for serverextensions

bnavigator · bnavigator · commit 121a2e6e3b1e · 2021-11-15T12:32:49.000+01:00
diff --git a/notebook/tests/test_serverextensions.py b/notebook/tests/test_serverextensions.py
@@ -68,6 +68,7 @@ def setUp(self):
         p = patch.dict('os.environ', {
             'JUPYTER_CONFIG_DIR': self.config_dir,
             'JUPYTER_DATA_DIR': self.data_dir,
+            'PYTHONNOUSERSITE': 1,
         })
         self.patches.append(p)
         for mod in (paths, nbextensions):
