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layer at (0,0) size 800x600
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      RenderBlock {H3} at (0,0) size 784x23
        RenderText {#text} at (0,0) size 464x22
          text run at (0,0) width 464: "Test of unqualifed :hover selector in quirks parsing mode"
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          text run at (0,0) width 586: "Moving the mouse anywhere over the document should result no change to the background color."