[background-position-origin-interpolation.html]
  [Web Animations: property <background-position> from [center center\] to [left 20px center\] at (0.5) should be [calc(10px + 25%) 50%\]]
    expected: FAIL

  [Web Animations: property <background-position> from [center center\] to [left 20px bottom 20px\] at (0.25) should be [calc(5px + 37.5%) calc(-5px + 62.5%)\]]
    expected: FAIL

  [Web Animations: property <background-position> from [center center\] to [center center\] at (1) should be [50% 50%\]]
    expected: FAIL

  [Web Animations: property <background-position> from [center center\] to [right 20px top 20px\] at (0) should be [50% 50%\]]
    expected: FAIL

  [Web Animations: property <background-position> from [center center\] to [left 20px center\] at (0.25) should be [calc(5px + 37.5%) 50%\]]
    expected: FAIL

  [Web Animations: property <background-position> from [center center\] to [right 20px top 20px\] at (0.5) should be [calc(-10px + 75%) calc(10px + 25%)\]]
    expected: FAIL

  [Web Animations: property <background-position> from [initial\] to [left 20px top 20px\] at (0.25) should be [5px 5px\]]
    expected: FAIL

  [Web Animations: property <background-position> from neutral to [left 20px top 20px\] at (0.5) should be [15px 15px\]]
    expected: FAIL

  [Web Animations: property <background-position> from [center center\] to [center center\] at (0.25) should be [50% 50%\]]
    expected: FAIL

  [Web Animations: property <background-position> from [center center\] to [right 20px top 20px\] at (0.25) should be [calc(-5px + 62.5%) calc(5px + 37.5%)\]]
    expected: FAIL

  [Web Animations: property <background-position> from [center center\] to [center center\] at (0.75) should be [50% 50%\]]
    expected: FAIL

  [Web Animations: property <background-position> from [center center\] to [right 20px bottom 20px\] at (0.5) should be [calc(-10px + 75%) calc(-10px + 75%)\]]
    expected: FAIL

  [Web Animations: property <background-position> from [inherit\] to [left 20px top 20px\] at (0.75) should be [35px 35px\]]
    expected: FAIL

  [Web Animations: property <background-position> from [unset\] to [left 20px top 20px\] at (0.75) should be [15px 15px\]]
    expected: FAIL

  [Web Animations: property <background-position> from [center center\] to [left 20px top 20px\] at (0.5) should be [calc(10px + 25%) calc(10px + 25%)\]]
    expected: FAIL

  [Web Animations: property <background-position> from [inherit\] to [left 20px top 20px\] at (0.25) should be [65px 65px\]]
    expected: FAIL

  [Web Animations: property <background-position> from [center center\] to [left 20px bottom 20px\] at (1) should be [20px calc(-20px + 100%)\]]
    expected: FAIL

  [Web Animations: property <background-position> from [center center\] to [center top 20px\] at (1) should be [50% 20px\]]
    expected: FAIL

  [Web Animations: property <background-position> from [center center\] to [right 20px center\] at (1) should be [calc(-20px + 100%) 50%\]]
    expected: FAIL

  [Web Animations: property <background-position> from [center center\] to [right 20px bottom 20px\] at (0) should be [50% 50%\]]
    expected: FAIL

  [Web Animations: property <background-position> from neutral to [left 20px top 20px\] at (0) should be [10px 10px\]]
    expected: FAIL

  [Web Animations: property <background-position> from [center center\] to [right 20px top 20px\] at (0.75) should be [calc(-15px + 87.5%) calc(15px + 12.5%)\]]
    expected: FAIL

  [Web Animations: property <background-position> from [center center\] to [center bottom 20px\] at (0.25) should be [50% calc(-5px + 62.5%)\]]
    expected: FAIL

  [Web Animations: property <background-position> from [center center\] to [center bottom 20px\] at (1) should be [50% calc(-20px + 100%)\]]
    expected: FAIL

  [Web Animations: property <background-position> from [center center\] to [center center\] at (0) should be [50% 50%\]]
    expected: FAIL

  [Web Animations: property <background-position> from [initial\] to [left 20px top 20px\] at (0.5) should be [10px 10px\]]
    expected: FAIL

  [Web Animations: property <background-position> from [center center\] to [right 20px center\] at (0.25) should be [calc(-5px + 62.5%) 50%\]]
    expected: FAIL

  [Web Animations: property <background-position> from [center center\] to [center top 20px\] at (0.5) should be [50% calc(10px + 25%)\]]
    expected: FAIL

  [Web Animations: property <background-position> from [inherit\] to [left 20px top 20px\] at (1) should be [20px 20px\]]
    expected: FAIL

  [Web Animations: property <background-position> from [center center\] to [right 20px center\] at (0) should be [50% 50%\]]
    expected: FAIL

  [Web Animations: property <background-position> from [center center\] to [center top 20px\] at (0.75) should be [50% calc(15px + 12.5%)\]]
    expected: FAIL

  [Web Animations: property <background-position> from [center\] to [bottom\] at (1) should be [50% 100%\]]
    expected: FAIL

  [Web Animations: property <background-position> from [initial\] to [left 20px top 20px\] at (1) should be [20px 20px\]]
    expected: FAIL

  [Web Animations: property <background-position> from [center center\] to [right 20px bottom 20px\] at (1) should be [calc(-20px + 100%) calc(-20px + 100%)\]]
    expected: FAIL

  [Web Animations: property <background-position> from [center center\] to [right 20px bottom 20px\] at (0.75) should be [calc(-15px + 87.5%) calc(-15px + 87.5%)\]]
    expected: FAIL

  [Web Animations: property <background-position> from [center center\] to [left 20px top 20px\] at (0.75) should be [calc(15px + 12.5%) calc(15px + 12.5%)\]]
    expected: FAIL

  [Web Animations: property <background-position> from [center\] to [bottom\] at (0.75) should be [50% 87.5%\]]
    expected: FAIL

  [Web Animations: property <background-position> from [center center\] to [left 20px center\] at (0) should be [50% 50%\]]
    expected: FAIL

  [Web Animations: property <background-position> from [unset\] to [left 20px top 20px\] at (0) should be [0% 0%\]]
    expected: FAIL

  [Web Animations: property <background-position> from [center center\] to [right 20px bottom 20px\] at (0.25) should be [calc(-5px + 62.5%) calc(-5px + 62.5%)\]]
    expected: FAIL

  [Web Animations: property <background-position> from [center\] to [bottom\] at (0.25) should be [50% 62.5%\]]
    expected: FAIL

  [Web Animations: property <background-position> from [center center\] to [right 20px center\] at (0.5) should be [calc(-10px + 75%) 50%\]]
    expected: FAIL

  [Web Animations: property <background-position> from [center center\] to [left 20px bottom 20px\] at (0) should be [50% 50%\]]
    expected: FAIL

  [Web Animations: property <background-position> from [center center\] to [center bottom 20px\] at (0.5) should be [50% calc(-10px + 75%)\]]
    expected: FAIL

  [Web Animations: property <background-position> from [center center\] to [center top 20px\] at (0) should be [50% 50%\]]
    expected: FAIL

  [Web Animations: property <background-position> from [center\] to [bottom\] at (0) should be [50% 50%\]]
    expected: FAIL

  [Web Animations: property <background-position> from [inherit\] to [left 20px top 20px\] at (0.5) should be [50px 50px\]]
    expected: FAIL

  [Web Animations: property <background-position> from [center center\] to [left 20px bottom 20px\] at (0.5) should be [calc(10px + 25%) calc(-10px + 75%)\]]
    expected: FAIL

  [Web Animations: property <background-position> from [unset\] to [left 20px top 20px\] at (1) should be [20px 20px\]]
    expected: FAIL

  [Web Animations: property <background-position> from [inherit\] to [left 20px top 20px\] at (0) should be [80px 80px\]]
    expected: FAIL

  [Web Animations: property <background-position> from [center center\] to [right 20px center\] at (0.75) should be [calc(-15px + 87.5%) 50%\]]
    expected: FAIL

  [Web Animations: property <background-position> from [center center\] to [center top 20px\] at (0.25) should be [50% calc(5px + 37.5%)\]]
    expected: FAIL

  [Web Animations: property <background-position> from [center center\] to [left 20px top 20px\] at (0) should be [50% 50%\]]
    expected: FAIL

  [Web Animations: property <background-position> from [center\] to [bottom\] at (0.5) should be [50% 75%\]]
    expected: FAIL

  [Web Animations: property <background-position> from [initial\] to [left 20px top 20px\] at (0.75) should be [15px 15px\]]
    expected: FAIL

  [Web Animations: property <background-position> from [unset\] to [left 20px top 20px\] at (0.5) should be [10px 10px\]]
    expected: FAIL

  [Web Animations: property <background-position> from [center center\] to [left 20px bottom 20px\] at (0.75) should be [calc(15px + 12.5%) calc(-15px + 87.5%)\]]
    expected: FAIL

  [Web Animations: property <background-position> from [unset\] to [left 20px top 20px\] at (0.25) should be [5px 5px\]]
    expected: FAIL

  [Web Animations: property <background-position> from [center center\] to [left 20px center\] at (1) should be [20px 50%\]]
    expected: FAIL

  [Web Animations: property <background-position> from [center center\] to [center bottom 20px\] at (0) should be [50% 50%\]]
    expected: FAIL

  [Web Animations: property <background-position> from neutral to [left 20px top 20px\] at (0.25) should be [12.5px 12.5px\]]
    expected: FAIL

  [Web Animations: property <background-position> from [center center\] to [center bottom 20px\] at (0.75) should be [50% calc(-15px + 87.5%)\]]
    expected: FAIL

  [Web Animations: property <background-position> from [initial\] to [left 20px top 20px\] at (0) should be [0% 0%\]]
    expected: FAIL

  [Web Animations: property <background-position> from [center center\] to [center center\] at (0.5) should be [50% 50%\]]
    expected: FAIL

  [Web Animations: property <background-position> from [center center\] to [right 20px top 20px\] at (1) should be [calc(-20px + 100%) 20px\]]
    expected: FAIL

  [Web Animations: property <background-position> from [center center\] to [left 20px top 20px\] at (0.25) should be [calc(5px + 37.5%) calc(5px + 37.5%)\]]
    expected: FAIL

  [Web Animations: property <background-position> from [center center\] to [left 20px center\] at (0.75) should be [calc(15px + 12.5%) 50%\]]
    expected: FAIL

  [Web Animations: property <background-position> from neutral to [left 20px top 20px\] at (0.75) should be [17.5px 17.5px\]]
    expected: FAIL

  [Web Animations: property <background-position> from [center center\] to [left 20px top 20px\] at (1) should be [20px 20px\]]
    expected: FAIL

  [Web Animations: property <background-position> from neutral to [left 20px top 20px\] at (1) should be [20px 20px\]]
    expected: FAIL

  [Web Animations: property <background-position> from [initial\] to [left 20px top 20px\] at (0.25) should be [calc(0% + 5px) calc(0% + 5px)\]]
    expected: FAIL

  [Web Animations: property <background-position> from [initial\] to [left 20px top 20px\] at (0.5) should be [calc(0% + 10px) calc(0% + 10px)\]]
    expected: FAIL

  [Web Animations: property <background-position> from [initial\] to [left 20px top 20px\] at (0.75) should be [calc(0% + 15px) calc(0% + 15px)\]]
    expected: FAIL

  [Web Animations: property <background-position> from [initial\] to [left 20px top 20px\] at (1) should be [calc(0% + 20px) calc(0% + 20px)\]]
    expected: FAIL

  [Web Animations: property <background-position> from [unset\] to [left 20px top 20px\] at (0.25) should be [calc(0% + 5px) calc(0% + 5px)\]]
    expected: FAIL

  [Web Animations: property <background-position> from [unset\] to [left 20px top 20px\] at (0.5) should be [calc(0% + 10px) calc(0% + 10px)\]]
    expected: FAIL

  [Web Animations: property <background-position> from [unset\] to [left 20px top 20px\] at (0.75) should be [calc(0% + 15px) calc(0% + 15px)\]]
    expected: FAIL

  [Web Animations: property <background-position> from [unset\] to [left 20px top 20px\] at (1) should be [calc(0% + 20px) calc(0% + 20px)\]]
    expected: FAIL

  [Web Animations: property <background-position> from [center center\] to [left 20px top 20px\] at (1) should be [calc(0% + 20px) calc(0% + 20px)\]]
    expected: FAIL

  [Web Animations: property <background-position> from [center center\] to [center top 20px\] at (1) should be [50% calc(0% + 20px)\]]
    expected: FAIL

  [Web Animations: property <background-position> from [center center\] to [right 20px top 20px\] at (1) should be [calc(-20px + 100%) calc(0% + 20px)\]]
    expected: FAIL

  [Web Animations: property <background-position> from [center center\] to [left 20px center\] at (1) should be [calc(0% + 20px) 50%\]]
    expected: FAIL

  [Web Animations: property <background-position> from [center center\] to [left 20px bottom 20px\] at (1) should be [calc(0% + 20px) calc(-20px + 100%)\]]
    expected: FAIL