assert_equals(null, null, "Elements in shadow DOM must not be accessible from owner's document label.for attribute")
    at Test.<anonymous> ( /shadow-dom/untriaged/shadow-trees/upper-boundary-encapsulation/test-005.html:34:5)

assert_equals(null, null, "Elements in shadow DOM must not be accessible from owner's document button.form attribute")
    at  /shadow-dom/untriaged/shadow-trees/upper-boundary-encapsulation/test-005.html:58:9

assert_equals(null, null, "Elements in shadow DOM must not be accessible from owner's document fieldset.form attribute")
    at  /shadow-dom/untriaged/shadow-trees/upper-boundary-encapsulation/test-005.html:58:9

assert_equals(null, null, "Elements in shadow DOM must not be accessible from owner's document input.form attribute")
    at  /shadow-dom/untriaged/shadow-trees/upper-boundary-encapsulation/test-005.html:58:9

assert_equals(null, null, "Elements in shadow DOM must not be accessible from owner's document object.form attribute")
    at  /shadow-dom/untriaged/shadow-trees/upper-boundary-encapsulation/test-005.html:58:9

assert_equals(null, null, "Elements in shadow DOM must not be accessible from owner's document output.form attribute")
    at  /shadow-dom/untriaged/shadow-trees/upper-boundary-encapsulation/test-005.html:58:9

assert_equals(null, null, "Elements in shadow DOM must not be accessible from owner's document select.form attribute")
    at  /shadow-dom/untriaged/shadow-trees/upper-boundary-encapsulation/test-005.html:58:9

assert_equals(null, null, "Elements in shadow DOM must not be accessible from owner's document textarea.form attribute")
    at  /shadow-dom/untriaged/shadow-trees/upper-boundary-encapsulation/test-005.html:58:9