Add None check before np.testing.assert_allclose #3489

Job	Run time
Build source distribution	10s
determine-arm64-runner	1s
Build wheels for cp311-manylinux_x86_64	6m 23s
Build wheels for cp311-manylinux_x86_64	6m 9s
Build wheels for cp311-macosx_x86_64	5m 27s
Build wheels for cp311-macosx_arm64	3m 21s
Build wheels for cp311-win_amd64	4m 46s
Build wheels for cp310-manylinux_aarch64	8m 44s
build_docker	1s
build_pypi_index	1s
upload_pypi	1s
Pass testing build wheels	3s
deploy_pypi_index	1s
	35m 8s

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