Work around https://gitlab.com/gwpy/gwpy/-/issues/1815
This fixes test failures that started with the release of matplotlib 3.10.0. The test failures are due to a bug in gwpy, not matplotlib, but the matplotlib release surfaced the error.
This fixes test failures that started with the release of matplotlib 3.10.0. The test failures are due to a bug in gwpy, not matplotlib, but the matplotlib release surfaced the error.