[letter-spacing-interpolation.html]
  [Web Animations: property <letter-spacing> from neutral to [20px\] at (-0.3) should be [33px\]]
    expected: FAIL

  [Web Animations: property <letter-spacing> from neutral to [20px\] at (0) should be [30px\]]
    expected: FAIL

  [Web Animations: property <letter-spacing> from neutral to [20px\] at (0.3) should be [27px\]]
    expected: FAIL

  [Web Animations: property <letter-spacing> from neutral to [20px\] at (0.6) should be [24px\]]
    expected: FAIL

  [Web Animations: property <letter-spacing> from neutral to [20px\] at (1) should be [20px\]]
    expected: FAIL

  [Web Animations: property <letter-spacing> from neutral to [20px\] at (1.5) should be [15px\]]
    expected: FAIL

  [Web Animations: property <letter-spacing> from [initial\] to [20px\] at (-0.3) should be [-6px\]]
    expected: FAIL

  [Web Animations: property <letter-spacing> from [initial\] to [20px\] at (0) should be [normal\]]
    expected: FAIL

  [Web Animations: property <letter-spacing> from [initial\] to [20px\] at (0.3) should be [6px\]]
    expected: FAIL

  [Web Animations: property <letter-spacing> from [initial\] to [20px\] at (0.6) should be [12px\]]
    expected: FAIL

  [Web Animations: property <letter-spacing> from [initial\] to [20px\] at (1) should be [20px\]]
    expected: FAIL

  [Web Animations: property <letter-spacing> from [initial\] to [20px\] at (1.5) should be [30px\]]
    expected: FAIL

  [Web Animations: property <letter-spacing> from [inherit\] to [20px\] at (-0.3) should be [-3.4px\]]
    expected: FAIL

  [Web Animations: property <letter-spacing> from [inherit\] to [20px\] at (0) should be [2px\]]
    expected: FAIL

  [Web Animations: property <letter-spacing> from [inherit\] to [20px\] at (0.3) should be [7.4px\]]
    expected: FAIL

  [Web Animations: property <letter-spacing> from [inherit\] to [20px\] at (0.6) should be [12.8px\]]
    expected: FAIL

  [Web Animations: property <letter-spacing> from [inherit\] to [20px\] at (1) should be [20px\]]
    expected: FAIL

  [Web Animations: property <letter-spacing> from [inherit\] to [20px\] at (1.5) should be [29px\]]
    expected: FAIL

  [Web Animations: property <letter-spacing> from [unset\] to [20px\] at (-0.3) should be [-3.4px\]]
    expected: FAIL

  [Web Animations: property <letter-spacing> from [unset\] to [20px\] at (0) should be [2px\]]
    expected: FAIL

  [Web Animations: property <letter-spacing> from [unset\] to [20px\] at (0.3) should be [7.4px\]]
    expected: FAIL

  [Web Animations: property <letter-spacing> from [unset\] to [20px\] at (0.6) should be [12.8px\]]
    expected: FAIL

  [Web Animations: property <letter-spacing> from [unset\] to [20px\] at (1) should be [20px\]]
    expected: FAIL

  [Web Animations: property <letter-spacing> from [unset\] to [20px\] at (1.5) should be [29px\]]
    expected: FAIL

  [Web Animations: property <letter-spacing> from [-10px\] to [10px\] at (-0.3) should be [-16px\]]
    expected: FAIL

  [Web Animations: property <letter-spacing> from [-10px\] to [10px\] at (0) should be [-10px\]]
    expected: FAIL

  [Web Animations: property <letter-spacing> from [-10px\] to [10px\] at (0.3) should be [-4px\]]
    expected: FAIL

  [Web Animations: property <letter-spacing> from [-10px\] to [10px\] at (0.6) should be [2px\]]
    expected: FAIL

  [Web Animations: property <letter-spacing> from [-10px\] to [10px\] at (1) should be [10px\]]
    expected: FAIL

  [Web Animations: property <letter-spacing> from [-10px\] to [10px\] at (1.5) should be [20px\]]
    expected: FAIL

  [Web Animations: property <letter-spacing> from [normal\] to [10px\] at (-0.3) should be [-3px\]]
    expected: FAIL

  [Web Animations: property <letter-spacing> from [normal\] to [10px\] at (0) should be [normal\]]
    expected: FAIL

  [Web Animations: property <letter-spacing> from [normal\] to [10px\] at (0.3) should be [3px\]]
    expected: FAIL

  [Web Animations: property <letter-spacing> from [normal\] to [10px\] at (0.6) should be [6px\]]
    expected: FAIL

  [Web Animations: property <letter-spacing> from [normal\] to [10px\] at (1) should be [10px\]]
    expected: FAIL

  [Web Animations: property <letter-spacing> from [normal\] to [10px\] at (1.5) should be [15px\]]
    expected: FAIL