
PASS ":is(ul,ol,.list) > [hidden]" should be a valid selector
PASS ":is(:hover,:focus)" should be a valid selector
PASS "a:is(:not(:hover))" should be a valid selector
PASS ":is(#a)" should be a valid selector
PASS ".a.b ~ :is(.c.d ~ .e.f)" should be a valid selector
PASS ".a.b ~ .c.d:is(span.e + .f, .g.h > .i.j .k)" should be a valid selector