fix some tests

extensions/positron-python/python_files/posit/positron/tests/conftest.py

@@ -131,6 +131,7 @@ def shell(kernel) -> Iterable[PositronShell]:
     yield shell
 
     # Ensure a clean namespace
+    # TODO: clean hidden vars here?
     new_user_ns_keys = set(shell.user_ns.keys()) - user_ns_keys
     for key in new_user_ns_keys:
         del shell.user_ns[key]

extensions/positron-python/python_files/posit/positron/tests/test_ui.py

@@ -283,6 +283,7 @@ def test_plotly_show_sends_events(
     assert params["title"] == ""
     assert params["is_plot"]
     assert params["height"] == 0
+    # TODO: go through this interactively and ensure the plot doesn't appear in __
 
 
 def test_is_not_plot_url_events(

extensions/positron-python/python_files/posit/positron/variables.py

@@ -435,6 +435,10 @@ def _get_filtered_vars(self, variables: Mapping[str, Any] | None = None) -> dict
         """
         if variables is None:
             variables = self._get_user_ns()
+            # This path only runs during initialization so we don't care about the values of the
+            # hidden variables
+            hidden = self.kernel.shell.user_ns_hidden or {}
+            return {key: value for key, value in variables.items() if key not in hidden}
 
         return {key: value for key, value in variables.items() if not self._is_hidden(key, value)}