issue_comments: 1204463757

``` __ ERROR at teardown of testassert_valid_xy _____ [gw1] linux -- Python 3.8.13 /home/runner/micromamba/envs/xarray-tests/bin/python

@pytest.fixture(scope="function", autouse=True)
def test_all_figures_closed():
    """meta-test to ensure all figures are closed at the end of a test

    Notes:  Scope is kept to module (only invoke this function once per test
    module) else tests cannot be run in parallel (locally). Disadvantage: only
    catches one open figure per run. May still give a false positive if tests
    are run in parallel.
    """
    yield None

  open_figs = len(plt.get_fignums())

E NameError: name 'plt' is not defined ``` Hmm, strange error. _assert_valid_xy has no matplotlib stuff so there should be no need to make sure all figures are closed. Oh well just adding the requires_matlplotlib solves this.