0)");

    shadowRoot.adoptedStyleSheets = [greenStyleSheet, blueStyleSheet];
    assert_equals(getComputedStyle(greenShadowSpan).color, "rgb(0, 128, 0)");
    assert_equals(getComputedStyle(redShadowSpan).color, "rgb(0, 0, 0)");
    assert_equals(getComputedStyle(blueShadowSpan).color, "rgb(0, 0, 0)");
    assert_equals(getComputedStyle(whiteShadowSpan).color, "rgb(0, 0, 0)");
    assert_equals(getComputedStyle(yellowShadowSpan).color, "rgb(0, 0, 0)");

    shadowRoot.adoptedStyleSheets = [redStyleSheet, y