This is a wdspec test.
[FAIL] test_no_browsing_context
AssertionError: assert 'no such element' == 'no such window'
[FAIL] test_no_such_element_with_shadow_root
assert 500 == 404
[FAIL] test_transform_capitalize[underscore]
AssertionError: assert 'Foo_Bar' == 'Foo_bar'
[FAIL] test_shadow_root_slot[default visible]
AssertionError: assert '' == 'foobar'
[FAIL] test_shadow_root_slot[default outside]
AssertionError: assert 'bar' == 'foobar'
[FAIL] test_shadow_root_slot[default hidden]
AssertionError: assert '' == 'bar'
[FAIL] test_pretty_print_xml
AssertionError: assert '' == 'cheese'
Harness: the test ran to completion.