Test for chromium bug : 396655. Tables with specific merge cell configuration render with extra height to tr elements. We have the below table. Because cell A and cell D overlap in the second row, the height of the second row is the 1px difference between A and B and the 1px difference between C and D. +-----+-----+ | | B | | A +-----+ | | | +-----+ D | | C | | +-----+-----+ PASS PASS PASS