LayoutTests/imported/w3c/web-platform-tests/css/css-backgrounds/animations/background-position-interpolation-expected.txt

PASS CSS Transitions: property <background-position> from neutral to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (-0.25) should be [30px 30px, 30px 30px, 30px 30px, 30px 30px] 
PASS CSS Transitions: property <background-position> from neutral to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0) should be [40px 40px, 40px 40px, 40px 40px, 40px 40px] 
PASS CSS Transitions: property <background-position> from neutral to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.25) should be [50px 50px, 50px 50px, 50px 50px, 50px 50px] 
PASS CSS Transitions: property <background-position> from neutral to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.5) should be [60px 60px, 60px 60px, 60px 60px, 60px 60px] 
PASS CSS Transitions: property <background-position> from neutral to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.75) should be [70px 70px, 70px 70px, 70px 70px, 70px 70px] 
PASS CSS Transitions: property <background-position> from neutral to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (1) should be [80px 80px, 80px 80px, 80px 80px, 80px 80px] 
PASS CSS Transitions: property <background-position> from neutral to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (1.25) should be [90px 90px, 90px 90px, 90px 90px, 90px 90px] 
PASS CSS Transitions with transition: all: property <background-position> from neutral to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (-0.25) should be [30px 30px, 30px 30px, 30px 30px, 30px 30px] 
PASS CSS Transitions with transition: all: property <background-position> from neutral to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0) should be [40px 40px, 40px 40px, 40px 40px, 40px 40px] 
PASS CSS Transitions with transition: all: property <background-position> from neutral to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.25) should be [50px 50px, 50px 50px, 50px 50px, 50px 50px] 
PASS CSS Transitions with transition: all: property <background-position> from neutral to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.5) should be [60px 60px, 60px 60px, 60px 60px, 60px 60px] 
PASS CSS Transitions with transition: all: property <background-position> from neutral to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.75) should be [70px 70px, 70px 70px, 70px 70px, 70px 70px] 
PASS CSS Transitions with transition: all: property <background-position> from neutral to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (1) should be [80px 80px, 80px 80px, 80px 80px, 80px 80px] 
PASS CSS Transitions with transition: all: property <background-position> from neutral to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (1.25) should be [90px 90px, 90px 90px, 90px 90px, 90px 90px] 
PASS CSS Animations: property <background-position> from neutral to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (-0.25) should be [30px 30px, 30px 30px, 30px 30px, 30px 30px] 
PASS CSS Animations: property <background-position> from neutral to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0) should be [40px 40px, 40px 40px, 40px 40px, 40px 40px] 
PASS CSS Animations: property <background-position> from neutral to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.25) should be [50px 50px, 50px 50px, 50px 50px, 50px 50px] 
PASS CSS Animations: property <background-position> from neutral to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.5) should be [60px 60px, 60px 60px, 60px 60px, 60px 60px] 
PASS CSS Animations: property <background-position> from neutral to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.75) should be [70px 70px, 70px 70px, 70px 70px, 70px 70px] 
PASS CSS Animations: property <background-position> from neutral to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (1) should be [80px 80px, 80px 80px, 80px 80px, 80px 80px] 
PASS CSS Animations: property <background-position> from neutral to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (1.25) should be [90px 90px, 90px 90px, 90px 90px, 90px 90px] 
PASS Web Animations: property <background-position> from neutral to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (-0.25) should be [30px 30px, 30px 30px, 30px 30px, 30px 30px] 
FAIL Web Animations: property <background-position> from neutral to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0) should be [40px 40px, 40px 40px, 40px 40px, 40px 40px] assert_equals: expected "40px 40px , 40px 40px , 40px 40px , 40px 40px " but got "30px 30px , 30px 30px , 30px 30px , 30px 30px "
FAIL Web Animations: property <background-position> from neutral to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.25) should be [50px 50px, 50px 50px, 50px 50px, 50px 50px] assert_equals: expected "50px 50px , 50px 50px , 50px 50px , 50px 50px " but got "42.5px 42.5px , 42.5px 42.5px , 42.5px 42.5px , 42.5px 42.5px "
FAIL Web Animations: property <background-position> from neutral to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.5) should be [60px 60px, 60px 60px, 60px 60px, 60px 60px] assert_equals: expected "60px 60px , 60px 60px , 60px 60px , 60px 60px " but got "61.25px 61.25px , 61.25px 61.25px , 61.25px 61.25px , 61.25px 61.25px "
FAIL Web Animations: property <background-position> from neutral to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.75) should be [70px 70px, 70px 70px, 70px 70px, 70px 70px] assert_equals: expected "70px 70px , 70px 70px , 70px 70px , 70px 70px " but got "75.31px 75.31px , 75.31px 75.31px , 75.31px 75.31px , 75.31px 75.31px "
PASS Web Animations: property <background-position> from neutral to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (1) should be [80px 80px, 80px 80px, 80px 80px, 80px 80px] 
FAIL Web Animations: property <background-position> from neutral to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (1.25) should be [90px 90px, 90px 90px, 90px 90px, 90px 90px] assert_equals: expected "90px 90px , 90px 90px , 90px 90px , 90px 90px " but got "80px 80px , 80px 80px , 80px 80px , 80px 80px "
FAIL CSS Transitions: property <background-position> from [initial] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (-0.25) should be [calc(0% - 20px)  calc(0% - 20px),  calc(0% - 20px)  calc(0% - 20px),  calc(0% - 20px)  calc(0% - 20px),  calc(0% - 20px)  calc(0% - 20px)] assert_equals: expected "calc ( 0 % - 20px ) calc ( 0 % - 20px ) , calc ( 0 % - 20px ) calc ( 0 % - 20px ) , calc ( 0 % - 20px ) calc ( 0 % - 20px ) , calc ( 0 % - 20px ) calc ( 0 % - 20px ) " but got "- 20px - 20px , - 20px - 20px , - 20px - 20px , - 20px - 20px "
FAIL CSS Transitions: property <background-position> from [initial] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0) should be [0% 0%, 0% 0%, 0% 0%, 0% 0%] assert_equals: expected "0 % 0 % , 0 % 0 % , 0 % 0 % , 0 % 0 % " but got "0px 0px , 0px 0px , 0px 0px , 0px 0px "
FAIL CSS Transitions: property <background-position> from [initial] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.25) should be [calc(0% + 20px)  calc(0% + 20px),  calc(0% + 20px)  calc(0% + 20px),  calc(0% + 20px)  calc(0% + 20px),  calc(0% + 20px)  calc(0% + 20px)] assert_equals: expected "calc ( 0 % + 20px ) calc ( 0 % + 20px ) , calc ( 0 % + 20px ) calc ( 0 % + 20px ) , calc ( 0 % + 20px ) calc ( 0 % + 20px ) , calc ( 0 % + 20px ) calc ( 0 % + 20px ) " but got "20px 20px , 20px 20px , 20px 20px , 20px 20px "
FAIL CSS Transitions: property <background-position> from [initial] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.5) should be [calc(0% + 40px)  calc(0% + 40px),  calc(0% + 40px)  calc(0% + 40px),  calc(0% + 40px)  calc(0% + 40px),  calc(0% + 40px)  calc(0% + 40px)] assert_equals: expected "calc ( 0 % + 40px ) calc ( 0 % + 40px ) , calc ( 0 % + 40px ) calc ( 0 % + 40px ) , calc ( 0 % + 40px ) calc ( 0 % + 40px ) , calc ( 0 % + 40px ) calc ( 0 % + 40px ) " but got "40px 40px , 40px 40px , 40px 40px , 40px 40px "
FAIL CSS Transitions: property <background-position> from [initial] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.75) should be [calc(0% + 60px)  calc(0% + 60px),  calc(0% + 60px)  calc(0% + 60px),  calc(0% + 60px)  calc(0% + 60px),  calc(0% + 60px)  calc(0% + 60px)] assert_equals: expected "calc ( 0 % + 60px ) calc ( 0 % + 60px ) , calc ( 0 % + 60px ) calc ( 0 % + 60px ) , calc ( 0 % + 60px ) calc ( 0 % + 60px ) , calc ( 0 % + 60px ) calc ( 0 % + 60px ) " but got "60px 60px , 60px 60px , 60px 60px , 60px 60px "
FAIL CSS Transitions: property <background-position> from [initial] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (1) should be [calc(0% + 80px)  calc(0% + 80px),  calc(0% + 80px)  calc(0% + 80px),  calc(0% + 80px)  calc(0% + 80px),  calc(0% + 80px)  calc(0% + 80px)] assert_equals: expected "calc ( 0 % + 80px ) calc ( 0 % + 80px ) , calc ( 0 % + 80px ) calc ( 0 % + 80px ) , calc ( 0 % + 80px ) calc ( 0 % + 80px ) , calc ( 0 % + 80px ) calc ( 0 % + 80px ) " but got "80px 80px , 80px 80px , 80px 80px , 80px 80px "
FAIL CSS Transitions: property <background-position> from [initial] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (1.25) should be [calc(0% + 100px) calc(0% + 100px), calc(0% + 100px) calc(0% + 100px), calc(0% + 100px) calc(0% + 100px), calc(0% + 100px) calc(0% + 100px)] assert_equals: expected "calc ( 0 % + 100px ) calc ( 0 % + 100px ) , calc ( 0 % + 100px ) calc ( 0 % + 100px ) , calc ( 0 % + 100px ) calc ( 0 % + 100px ) , calc ( 0 % + 100px ) calc ( 0 % + 100px ) " but got "100px 100px , 100px 100px , 100px 100px , 100px 100px "
FAIL CSS Transitions with transition: all: property <background-position> from [initial] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (-0.25) should be [calc(0% - 20px)  calc(0% - 20px),  calc(0% - 20px)  calc(0% - 20px),  calc(0% - 20px)  calc(0% - 20px),  calc(0% - 20px)  calc(0% - 20px)] assert_equals: expected "calc ( 0 % - 20px ) calc ( 0 % - 20px ) , calc ( 0 % - 20px ) calc ( 0 % - 20px ) , calc ( 0 % - 20px ) calc ( 0 % - 20px ) , calc ( 0 % - 20px ) calc ( 0 % - 20px ) " but got "- 20px - 20px , - 20px - 20px , - 20px - 20px , - 20px - 20px "
FAIL CSS Transitions with transition: all: property <background-position> from [initial] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0) should be [0% 0%, 0% 0%, 0% 0%, 0% 0%] assert_equals: expected "0 % 0 % , 0 % 0 % , 0 % 0 % , 0 % 0 % " but got "0px 0px , 0px 0px , 0px 0px , 0px 0px "
FAIL CSS Transitions with transition: all: property <background-position> from [initial] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.25) should be [calc(0% + 20px)  calc(0% + 20px),  calc(0% + 20px)  calc(0% + 20px),  calc(0% + 20px)  calc(0% + 20px),  calc(0% + 20px)  calc(0% + 20px)] assert_equals: expected "calc ( 0 % + 20px ) calc ( 0 % + 20px ) , calc ( 0 % + 20px ) calc ( 0 % + 20px ) , calc ( 0 % + 20px ) calc ( 0 % + 20px ) , calc ( 0 % + 20px ) calc ( 0 % + 20px ) " but got "20px 20px , 20px 20px , 20px 20px , 20px 20px "
FAIL CSS Transitions with transition: all: property <background-position> from [initial] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.5) should be [calc(0% + 40px)  calc(0% + 40px),  calc(0% + 40px)  calc(0% + 40px),  calc(0% + 40px)  calc(0% + 40px),  calc(0% + 40px)  calc(0% + 40px)] assert_equals: expected "calc ( 0 % + 40px ) calc ( 0 % + 40px ) , calc ( 0 % + 40px ) calc ( 0 % + 40px ) , calc ( 0 % + 40px ) calc ( 0 % + 40px ) , calc ( 0 % + 40px ) calc ( 0 % + 40px ) " but got "40px 40px , 40px 40px , 40px 40px , 40px 40px "
FAIL CSS Transitions with transition: all: property <background-position> from [initial] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.75) should be [calc(0% + 60px)  calc(0% + 60px),  calc(0% + 60px)  calc(0% + 60px),  calc(0% + 60px)  calc(0% + 60px),  calc(0% + 60px)  calc(0% + 60px)] assert_equals: expected "calc ( 0 % + 60px ) calc ( 0 % + 60px ) , calc ( 0 % + 60px ) calc ( 0 % + 60px ) , calc ( 0 % + 60px ) calc ( 0 % + 60px ) , calc ( 0 % + 60px ) calc ( 0 % + 60px ) " but got "60px 60px , 60px 60px , 60px 60px , 60px 60px "
FAIL CSS Transitions with transition: all: property <background-position> from [initial] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (1) should be [calc(0% + 80px)  calc(0% + 80px),  calc(0% + 80px)  calc(0% + 80px),  calc(0% + 80px)  calc(0% + 80px),  calc(0% + 80px)  calc(0% + 80px)] assert_equals: expected "calc ( 0 % + 80px ) calc ( 0 % + 80px ) , calc ( 0 % + 80px ) calc ( 0 % + 80px ) , calc ( 0 % + 80px ) calc ( 0 % + 80px ) , calc ( 0 % + 80px ) calc ( 0 % + 80px ) " but got "80px 80px , 80px 80px , 80px 80px , 80px 80px "
FAIL CSS Transitions with transition: all: property <background-position> from [initial] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (1.25) should be [calc(0% + 100px) calc(0% + 100px), calc(0% + 100px) calc(0% + 100px), calc(0% + 100px) calc(0% + 100px), calc(0% + 100px) calc(0% + 100px)] assert_equals: expected "calc ( 0 % + 100px ) calc ( 0 % + 100px ) , calc ( 0 % + 100px ) calc ( 0 % + 100px ) , calc ( 0 % + 100px ) calc ( 0 % + 100px ) , calc ( 0 % + 100px ) calc ( 0 % + 100px ) " but got "100px 100px , 100px 100px , 100px 100px , 100px 100px "
FAIL CSS Animations: property <background-position> from [initial] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (-0.25) should be [calc(0% - 20px)  calc(0% - 20px),  calc(0% - 20px)  calc(0% - 20px),  calc(0% - 20px)  calc(0% - 20px),  calc(0% - 20px)  calc(0% - 20px)] assert_equals: expected "calc ( 0 % - 20px ) calc ( 0 % - 20px ) , calc ( 0 % - 20px ) calc ( 0 % - 20px ) , calc ( 0 % - 20px ) calc ( 0 % - 20px ) , calc ( 0 % - 20px ) calc ( 0 % - 20px ) " but got "- 20px - 20px , - 20px - 20px , - 20px - 20px , - 20px - 20px "
FAIL CSS Animations: property <background-position> from [initial] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0) should be [0% 0%, 0% 0%, 0% 0%, 0% 0%] assert_equals: expected "0 % 0 % , 0 % 0 % , 0 % 0 % , 0 % 0 % " but got "0px 0px , 0px 0px , 0px 0px , 0px 0px "
FAIL CSS Animations: property <background-position> from [initial] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.25) should be [calc(0% + 20px)  calc(0% + 20px),  calc(0% + 20px)  calc(0% + 20px),  calc(0% + 20px)  calc(0% + 20px),  calc(0% + 20px)  calc(0% + 20px)] assert_equals: expected "calc ( 0 % + 20px ) calc ( 0 % + 20px ) , calc ( 0 % + 20px ) calc ( 0 % + 20px ) , calc ( 0 % + 20px ) calc ( 0 % + 20px ) , calc ( 0 % + 20px ) calc ( 0 % + 20px ) " but got "20px 20px , 20px 20px , 20px 20px , 20px 20px "
FAIL CSS Animations: property <background-position> from [initial] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.5) should be [calc(0% + 40px)  calc(0% + 40px),  calc(0% + 40px)  calc(0% + 40px),  calc(0% + 40px)  calc(0% + 40px),  calc(0% + 40px)  calc(0% + 40px)] assert_equals: expected "calc ( 0 % + 40px ) calc ( 0 % + 40px ) , calc ( 0 % + 40px ) calc ( 0 % + 40px ) , calc ( 0 % + 40px ) calc ( 0 % + 40px ) , calc ( 0 % + 40px ) calc ( 0 % + 40px ) " but got "40px 40px , 40px 40px , 40px 40px , 40px 40px "
FAIL CSS Animations: property <background-position> from [initial] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.75) should be [calc(0% + 60px)  calc(0% + 60px),  calc(0% + 60px)  calc(0% + 60px),  calc(0% + 60px)  calc(0% + 60px),  calc(0% + 60px)  calc(0% + 60px)] assert_equals: expected "calc ( 0 % + 60px ) calc ( 0 % + 60px ) , calc ( 0 % + 60px ) calc ( 0 % + 60px ) , calc ( 0 % + 60px ) calc ( 0 % + 60px ) , calc ( 0 % + 60px ) calc ( 0 % + 60px ) " but got "60px 60px , 60px 60px , 60px 60px , 60px 60px "
FAIL CSS Animations: property <background-position> from [initial] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (1) should be [calc(0% + 80px)  calc(0% + 80px),  calc(0% + 80px)  calc(0% + 80px),  calc(0% + 80px)  calc(0% + 80px),  calc(0% + 80px)  calc(0% + 80px)] assert_equals: expected "calc ( 0 % + 80px ) calc ( 0 % + 80px ) , calc ( 0 % + 80px ) calc ( 0 % + 80px ) , calc ( 0 % + 80px ) calc ( 0 % + 80px ) , calc ( 0 % + 80px ) calc ( 0 % + 80px ) " but got "80px 80px , 80px 80px , 80px 80px , 80px 80px "
FAIL CSS Animations: property <background-position> from [initial] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (1.25) should be [calc(0% + 100px) calc(0% + 100px), calc(0% + 100px) calc(0% + 100px), calc(0% + 100px) calc(0% + 100px), calc(0% + 100px) calc(0% + 100px)] assert_equals: expected "calc ( 0 % + 100px ) calc ( 0 % + 100px ) , calc ( 0 % + 100px ) calc ( 0 % + 100px ) , calc ( 0 % + 100px ) calc ( 0 % + 100px ) , calc ( 0 % + 100px ) calc ( 0 % + 100px ) " but got "100px 100px , 100px 100px , 100px 100px , 100px 100px "
FAIL Web Animations: property <background-position> from [initial] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (-0.25) should be [calc(0% - 20px)  calc(0% - 20px),  calc(0% - 20px)  calc(0% - 20px),  calc(0% - 20px)  calc(0% - 20px),  calc(0% - 20px)  calc(0% - 20px)] assert_equals: expected "calc ( 0 % - 20px ) calc ( 0 % - 20px ) , calc ( 0 % - 20px ) calc ( 0 % - 20px ) , calc ( 0 % - 20px ) calc ( 0 % - 20px ) , calc ( 0 % - 20px ) calc ( 0 % - 20px ) " but got "- 20px - 20px , - 20px - 20px , - 20px - 20px , - 20px - 20px "
FAIL Web Animations: property <background-position> from [initial] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0) should be [0% 0%, 0% 0%, 0% 0%, 0% 0%] assert_equals: expected "0 % 0 % , 0 % 0 % , 0 % 0 % , 0 % 0 % " but got "0px 0px , 0px 0px , 0px 0px , 0px 0px "
FAIL Web Animations: property <background-position> from [initial] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.25) should be [calc(0% + 20px)  calc(0% + 20px),  calc(0% + 20px)  calc(0% + 20px),  calc(0% + 20px)  calc(0% + 20px),  calc(0% + 20px)  calc(0% + 20px)] assert_equals: expected "calc ( 0 % + 20px ) calc ( 0 % + 20px ) , calc ( 0 % + 20px ) calc ( 0 % + 20px ) , calc ( 0 % + 20px ) calc ( 0 % + 20px ) , calc ( 0 % + 20px ) calc ( 0 % + 20px ) " but got "20px 20px , 20px 20px , 20px 20px , 20px 20px "
FAIL Web Animations: property <background-position> from [initial] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.5) should be [calc(0% + 40px)  calc(0% + 40px),  calc(0% + 40px)  calc(0% + 40px),  calc(0% + 40px)  calc(0% + 40px),  calc(0% + 40px)  calc(0% + 40px)] assert_equals: expected "calc ( 0 % + 40px ) calc ( 0 % + 40px ) , calc ( 0 % + 40px ) calc ( 0 % + 40px ) , calc ( 0 % + 40px ) calc ( 0 % + 40px ) , calc ( 0 % + 40px ) calc ( 0 % + 40px ) " but got "40px 40px , 40px 40px , 40px 40px , 40px 40px "
FAIL Web Animations: property <background-position> from [initial] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.75) should be [calc(0% + 60px)  calc(0% + 60px),  calc(0% + 60px)  calc(0% + 60px),  calc(0% + 60px)  calc(0% + 60px),  calc(0% + 60px)  calc(0% + 60px)] assert_equals: expected "calc ( 0 % + 60px ) calc ( 0 % + 60px ) , calc ( 0 % + 60px ) calc ( 0 % + 60px ) , calc ( 0 % + 60px ) calc ( 0 % + 60px ) , calc ( 0 % + 60px ) calc ( 0 % + 60px ) " but got "60px 60px , 60px 60px , 60px 60px , 60px 60px "
FAIL Web Animations: property <background-position> from [initial] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (1) should be [calc(0% + 80px)  calc(0% + 80px),  calc(0% + 80px)  calc(0% + 80px),  calc(0% + 80px)  calc(0% + 80px),  calc(0% + 80px)  calc(0% + 80px)] assert_equals: expected "calc ( 0 % + 80px ) calc ( 0 % + 80px ) , calc ( 0 % + 80px ) calc ( 0 % + 80px ) , calc ( 0 % + 80px ) calc ( 0 % + 80px ) , calc ( 0 % + 80px ) calc ( 0 % + 80px ) " but got "80px 80px , 80px 80px , 80px 80px , 80px 80px "
FAIL Web Animations: property <background-position> from [initial] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (1.25) should be [calc(0% + 100px) calc(0% + 100px), calc(0% + 100px) calc(0% + 100px), calc(0% + 100px) calc(0% + 100px), calc(0% + 100px) calc(0% + 100px)] assert_equals: expected "calc ( 0 % + 100px ) calc ( 0 % + 100px ) , calc ( 0 % + 100px ) calc ( 0 % + 100px ) , calc ( 0 % + 100px ) calc ( 0 % + 100px ) , calc ( 0 % + 100px ) calc ( 0 % + 100px ) " but got "100px 100px , 100px 100px , 100px 100px , 100px 100px "
PASS CSS Transitions: property <background-position> from [inherit] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (-0.25) should be [55px 55px, 55px 55px, 55px 55px, 55px 55px] 
PASS CSS Transitions: property <background-position> from [inherit] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0) should be [60px 60px, 60px 60px, 60px 60px, 60px 60px] 
PASS CSS Transitions: property <background-position> from [inherit] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.25) should be [65px 65px, 65px 65px, 65px 65px, 65px 65px] 
PASS CSS Transitions: property <background-position> from [inherit] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.5) should be [70px 70px, 70px 70px, 70px 70px, 70px 70px] 
PASS CSS Transitions: property <background-position> from [inherit] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.75) should be [75px 75px, 75px 75px, 75px 75px, 75px 75px] 
PASS CSS Transitions: property <background-position> from [inherit] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (1) should be [80px 80px, 80px 80px, 80px 80px, 80px 80px] 
PASS CSS Transitions: property <background-position> from [inherit] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (1.25) should be [85px 85px, 85px 85px, 85px 85px, 85px 85px] 
PASS CSS Transitions with transition: all: property <background-position> from [inherit] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (-0.25) should be [55px 55px, 55px 55px, 55px 55px, 55px 55px] 
PASS CSS Transitions with transition: all: property <background-position> from [inherit] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0) should be [60px 60px, 60px 60px, 60px 60px, 60px 60px] 
PASS CSS Transitions with transition: all: property <background-position> from [inherit] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.25) should be [65px 65px, 65px 65px, 65px 65px, 65px 65px] 
PASS CSS Transitions with transition: all: property <background-position> from [inherit] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.5) should be [70px 70px, 70px 70px, 70px 70px, 70px 70px] 
PASS CSS Transitions with transition: all: property <background-position> from [inherit] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.75) should be [75px 75px, 75px 75px, 75px 75px, 75px 75px] 
PASS CSS Transitions with transition: all: property <background-position> from [inherit] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (1) should be [80px 80px, 80px 80px, 80px 80px, 80px 80px] 
PASS CSS Transitions with transition: all: property <background-position> from [inherit] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (1.25) should be [85px 85px, 85px 85px, 85px 85px, 85px 85px] 
PASS CSS Animations: property <background-position> from [inherit] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (-0.25) should be [55px 55px, 55px 55px, 55px 55px, 55px 55px] 
PASS CSS Animations: property <background-position> from [inherit] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0) should be [60px 60px, 60px 60px, 60px 60px, 60px 60px] 
PASS CSS Animations: property <background-position> from [inherit] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.25) should be [65px 65px, 65px 65px, 65px 65px, 65px 65px] 
PASS CSS Animations: property <background-position> from [inherit] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.5) should be [70px 70px, 70px 70px, 70px 70px, 70px 70px] 
PASS CSS Animations: property <background-position> from [inherit] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.75) should be [75px 75px, 75px 75px, 75px 75px, 75px 75px] 
PASS CSS Animations: property <background-position> from [inherit] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (1) should be [80px 80px, 80px 80px, 80px 80px, 80px 80px] 
PASS CSS Animations: property <background-position> from [inherit] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (1.25) should be [85px 85px, 85px 85px, 85px 85px, 85px 85px] 
FAIL Web Animations: property <background-position> from [inherit] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (-0.25) should be [55px 55px, 55px 55px, 55px 55px, 55px 55px] assert_equals: expected "55px 55px , 55px 55px , 55px 55px , 55px 55px " but got "30px 30px , 30px 30px , 30px 30px , 30px 30px "
FAIL Web Animations: property <background-position> from [inherit] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0) should be [60px 60px, 60px 60px, 60px 60px, 60px 60px] assert_equals: expected "60px 60px , 60px 60px , 60px 60px , 60px 60px " but got "30px 30px , 30px 30px , 30px 30px , 30px 30px "
FAIL Web Animations: property <background-position> from [inherit] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.25) should be [65px 65px, 65px 65px, 65px 65px, 65px 65px] assert_equals: expected "65px 65px , 65px 65px , 65px 65px , 65px 65px " but got "42.5px 42.5px , 42.5px 42.5px , 42.5px 42.5px , 42.5px 42.5px "
FAIL Web Animations: property <background-position> from [inherit] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.5) should be [70px 70px, 70px 70px, 70px 70px, 70px 70px] assert_equals: expected "70px 70px , 70px 70px , 70px 70px , 70px 70px " but got "61.25px 61.25px , 61.25px 61.25px , 61.25px 61.25px , 61.25px 61.25px "
FAIL Web Animations: property <background-position> from [inherit] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.75) should be [75px 75px, 75px 75px, 75px 75px, 75px 75px] assert_equals: expected "75px 75px , 75px 75px , 75px 75px , 75px 75px " but got "75.31px 75.31px , 75.31px 75.31px , 75.31px 75.31px , 75.31px 75.31px "
PASS Web Animations: property <background-position> from [inherit] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (1) should be [80px 80px, 80px 80px, 80px 80px, 80px 80px] 
FAIL Web Animations: property <background-position> from [inherit] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (1.25) should be [85px 85px, 85px 85px, 85px 85px, 85px 85px] assert_equals: expected "85px 85px , 85px 85px , 85px 85px , 85px 85px " but got "80px 80px , 80px 80px , 80px 80px , 80px 80px "
FAIL CSS Transitions: property <background-position> from [unset] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (-0.25) should be [calc(0% - 20px)  calc(0% - 20px),  calc(0% - 20px)  calc(0% - 20px),  calc(0% - 20px)  calc(0% - 20px),  calc(0% - 20px)  calc(0% - 20px)] assert_equals: expected "calc ( 0 % - 20px ) calc ( 0 % - 20px ) , calc ( 0 % - 20px ) calc ( 0 % - 20px ) , calc ( 0 % - 20px ) calc ( 0 % - 20px ) , calc ( 0 % - 20px ) calc ( 0 % - 20px ) " but got "- 20px - 20px , - 20px - 20px , - 20px - 20px , - 20px - 20px "
FAIL CSS Transitions: property <background-position> from [unset] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0) should be [0% 0%, 0% 0%, 0% 0%, 0% 0%] assert_equals: expected "0 % 0 % , 0 % 0 % , 0 % 0 % , 0 % 0 % " but got "0px 0px , 0px 0px , 0px 0px , 0px 0px "
FAIL CSS Transitions: property <background-position> from [unset] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.25) should be [calc(0% + 20px)  calc(0% + 20px),  calc(0% + 20px)  calc(0% + 20px),  calc(0% + 20px)  calc(0% + 20px),  calc(0% + 20px)  calc(0% + 20px)] assert_equals: expected "calc ( 0 % + 20px ) calc ( 0 % + 20px ) , calc ( 0 % + 20px ) calc ( 0 % + 20px ) , calc ( 0 % + 20px ) calc ( 0 % + 20px ) , calc ( 0 % + 20px ) calc ( 0 % + 20px ) " but got "20px 20px , 20px 20px , 20px 20px , 20px 20px "
FAIL CSS Transitions: property <background-position> from [unset] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.5) should be [calc(0% + 40px)  calc(0% + 40px),  calc(0% + 40px)  calc(0% + 40px),  calc(0% + 40px)  calc(0% + 40px),  calc(0% + 40px)  calc(0% + 40px)] assert_equals: expected "calc ( 0 % + 40px ) calc ( 0 % + 40px ) , calc ( 0 % + 40px ) calc ( 0 % + 40px ) , calc ( 0 % + 40px ) calc ( 0 % + 40px ) , calc ( 0 % + 40px ) calc ( 0 % + 40px ) " but got "40px 40px , 40px 40px , 40px 40px , 40px 40px "
FAIL CSS Transitions: property <background-position> from [unset] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.75) should be [calc(0% + 60px)  calc(0% + 60px),  calc(0% + 60px)  calc(0% + 60px),  calc(0% + 60px)  calc(0% + 60px),  calc(0% + 60px)  calc(0% + 60px)] assert_equals: expected "calc ( 0 % + 60px ) calc ( 0 % + 60px ) , calc ( 0 % + 60px ) calc ( 0 % + 60px ) , calc ( 0 % + 60px ) calc ( 0 % + 60px ) , calc ( 0 % + 60px ) calc ( 0 % + 60px ) " but got "60px 60px , 60px 60px , 60px 60px , 60px 60px "
FAIL CSS Transitions: property <background-position> from [unset] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (1) should be [calc(0% + 80px)  calc(0% + 80px),  calc(0% + 80px)  calc(0% + 80px),  calc(0% + 80px)  calc(0% + 80px),  calc(0% + 80px)  calc(0% + 80px)] assert_equals: expected "calc ( 0 % + 80px ) calc ( 0 % + 80px ) , calc ( 0 % + 80px ) calc ( 0 % + 80px ) , calc ( 0 % + 80px ) calc ( 0 % + 80px ) , calc ( 0 % + 80px ) calc ( 0 % + 80px ) " but got "80px 80px , 80px 80px , 80px 80px , 80px 80px "
FAIL CSS Transitions: property <background-position> from [unset] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (1.25) should be [calc(0% + 100px) calc(0% + 100px), calc(0% + 100px) calc(0% + 100px), calc(0% + 100px) calc(0% + 100px), calc(0% + 100px) calc(0% + 100px)] assert_equals: expected "calc ( 0 % + 100px ) calc ( 0 % + 100px ) , calc ( 0 % + 100px ) calc ( 0 % + 100px ) , calc ( 0 % + 100px ) calc ( 0 % + 100px ) , calc ( 0 % + 100px ) calc ( 0 % + 100px ) " but got "100px 100px , 100px 100px , 100px 100px , 100px 100px "
FAIL CSS Transitions with transition: all: property <background-position> from [unset] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (-0.25) should be [calc(0% - 20px)  calc(0% - 20px),  calc(0% - 20px)  calc(0% - 20px),  calc(0% - 20px)  calc(0% - 20px),  calc(0% - 20px)  calc(0% - 20px)] assert_equals: expected "calc ( 0 % - 20px ) calc ( 0 % - 20px ) , calc ( 0 % - 20px ) calc ( 0 % - 20px ) , calc ( 0 % - 20px ) calc ( 0 % - 20px ) , calc ( 0 % - 20px ) calc ( 0 % - 20px ) " but got "- 20px - 20px , - 20px - 20px , - 20px - 20px , - 20px - 20px "
FAIL CSS Transitions with transition: all: property <background-position> from [unset] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0) should be [0% 0%, 0% 0%, 0% 0%, 0% 0%] assert_equals: expected "0 % 0 % , 0 % 0 % , 0 % 0 % , 0 % 0 % " but got "0px 0px , 0px 0px , 0px 0px , 0px 0px "
FAIL CSS Transitions with transition: all: property <background-position> from [unset] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.25) should be [calc(0% + 20px)  calc(0% + 20px),  calc(0% + 20px)  calc(0% + 20px),  calc(0% + 20px)  calc(0% + 20px),  calc(0% + 20px)  calc(0% + 20px)] assert_equals: expected "calc ( 0 % + 20px ) calc ( 0 % + 20px ) , calc ( 0 % + 20px ) calc ( 0 % + 20px ) , calc ( 0 % + 20px ) calc ( 0 % + 20px ) , calc ( 0 % + 20px ) calc ( 0 % + 20px ) " but got "20px 20px , 20px 20px , 20px 20px , 20px 20px "
FAIL CSS Transitions with transition: all: property <background-position> from [unset] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.5) should be [calc(0% + 40px)  calc(0% + 40px),  calc(0% + 40px)  calc(0% + 40px),  calc(0% + 40px)  calc(0% + 40px),  calc(0% + 40px)  calc(0% + 40px)] assert_equals: expected "calc ( 0 % + 40px ) calc ( 0 % + 40px ) , calc ( 0 % + 40px ) calc ( 0 % + 40px ) , calc ( 0 % + 40px ) calc ( 0 % + 40px ) , calc ( 0 % + 40px ) calc ( 0 % + 40px ) " but got "40px 40px , 40px 40px , 40px 40px , 40px 40px "
FAIL CSS Transitions with transition: all: property <background-position> from [unset] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.75) should be [calc(0% + 60px)  calc(0% + 60px),  calc(0% + 60px)  calc(0% + 60px),  calc(0% + 60px)  calc(0% + 60px),  calc(0% + 60px)  calc(0% + 60px)] assert_equals: expected "calc ( 0 % + 60px ) calc ( 0 % + 60px ) , calc ( 0 % + 60px ) calc ( 0 % + 60px ) , calc ( 0 % + 60px ) calc ( 0 % + 60px ) , calc ( 0 % + 60px ) calc ( 0 % + 60px ) " but got "60px 60px , 60px 60px , 60px 60px , 60px 60px "
FAIL CSS Transitions with transition: all: property <background-position> from [unset] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (1) should be [calc(0% + 80px)  calc(0% + 80px),  calc(0% + 80px)  calc(0% + 80px),  calc(0% + 80px)  calc(0% + 80px),  calc(0% + 80px)  calc(0% + 80px)] assert_equals: expected "calc ( 0 % + 80px ) calc ( 0 % + 80px ) , calc ( 0 % + 80px ) calc ( 0 % + 80px ) , calc ( 0 % + 80px ) calc ( 0 % + 80px ) , calc ( 0 % + 80px ) calc ( 0 % + 80px ) " but got "80px 80px , 80px 80px , 80px 80px , 80px 80px "
FAIL CSS Transitions with transition: all: property <background-position> from [unset] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (1.25) should be [calc(0% + 100px) calc(0% + 100px), calc(0% + 100px) calc(0% + 100px), calc(0% + 100px) calc(0% + 100px), calc(0% + 100px) calc(0% + 100px)] assert_equals: expected "calc ( 0 % + 100px ) calc ( 0 % + 100px ) , calc ( 0 % + 100px ) calc ( 0 % + 100px ) , calc ( 0 % + 100px ) calc ( 0 % + 100px ) , calc ( 0 % + 100px ) calc ( 0 % + 100px ) " but got "100px 100px , 100px 100px , 100px 100px , 100px 100px "
FAIL CSS Animations: property <background-position> from [unset] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (-0.25) should be [calc(0% - 20px)  calc(0% - 20px),  calc(0% - 20px)  calc(0% - 20px),  calc(0% - 20px)  calc(0% - 20px),  calc(0% - 20px)  calc(0% - 20px)] assert_equals: expected "calc ( 0 % - 20px ) calc ( 0 % - 20px ) , calc ( 0 % - 20px ) calc ( 0 % - 20px ) , calc ( 0 % - 20px ) calc ( 0 % - 20px ) , calc ( 0 % - 20px ) calc ( 0 % - 20px ) " but got "- 20px - 20px , - 20px - 20px , - 20px - 20px , - 20px - 20px "
FAIL CSS Animations: property <background-position> from [unset] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0) should be [0% 0%, 0% 0%, 0% 0%, 0% 0%] assert_equals: expected "0 % 0 % , 0 % 0 % , 0 % 0 % , 0 % 0 % " but got "0px 0px , 0px 0px , 0px 0px , 0px 0px "
FAIL CSS Animations: property <background-position> from [unset] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.25) should be [calc(0% + 20px)  calc(0% + 20px),  calc(0% + 20px)  calc(0% + 20px),  calc(0% + 20px)  calc(0% + 20px),  calc(0% + 20px)  calc(0% + 20px)] assert_equals: expected "calc ( 0 % + 20px ) calc ( 0 % + 20px ) , calc ( 0 % + 20px ) calc ( 0 % + 20px ) , calc ( 0 % + 20px ) calc ( 0 % + 20px ) , calc ( 0 % + 20px ) calc ( 0 % + 20px ) " but got "20px 20px , 20px 20px , 20px 20px , 20px 20px "
FAIL CSS Animations: property <background-position> from [unset] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.5) should be [calc(0% + 40px)  calc(0% + 40px),  calc(0% + 40px)  calc(0% + 40px),  calc(0% + 40px)  calc(0% + 40px),  calc(0% + 40px)  calc(0% + 40px)] assert_equals: expected "calc ( 0 % + 40px ) calc ( 0 % + 40px ) , calc ( 0 % + 40px ) calc ( 0 % + 40px ) , calc ( 0 % + 40px ) calc ( 0 % + 40px ) , calc ( 0 % + 40px ) calc ( 0 % + 40px ) " but got "40px 40px , 40px 40px , 40px 40px , 40px 40px "
FAIL CSS Animations: property <background-position> from [unset] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.75) should be [calc(0% + 60px)  calc(0% + 60px),  calc(0% + 60px)  calc(0% + 60px),  calc(0% + 60px)  calc(0% + 60px),  calc(0% + 60px)  calc(0% + 60px)] assert_equals: expected "calc ( 0 % + 60px ) calc ( 0 % + 60px ) , calc ( 0 % + 60px ) calc ( 0 % + 60px ) , calc ( 0 % + 60px ) calc ( 0 % + 60px ) , calc ( 0 % + 60px ) calc ( 0 % + 60px ) " but got "60px 60px , 60px 60px , 60px 60px , 60px 60px "
FAIL CSS Animations: property <background-position> from [unset] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (1) should be [calc(0% + 80px)  calc(0% + 80px),  calc(0% + 80px)  calc(0% + 80px),  calc(0% + 80px)  calc(0% + 80px),  calc(0% + 80px)  calc(0% + 80px)] assert_equals: expected "calc ( 0 % + 80px ) calc ( 0 % + 80px ) , calc ( 0 % + 80px ) calc ( 0 % + 80px ) , calc ( 0 % + 80px ) calc ( 0 % + 80px ) , calc ( 0 % + 80px ) calc ( 0 % + 80px ) " but got "80px 80px , 80px 80px , 80px 80px , 80px 80px "
FAIL CSS Animations: property <background-position> from [unset] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (1.25) should be [calc(0% + 100px) calc(0% + 100px), calc(0% + 100px) calc(0% + 100px), calc(0% + 100px) calc(0% + 100px), calc(0% + 100px) calc(0% + 100px)] assert_equals: expected "calc ( 0 % + 100px ) calc ( 0 % + 100px ) , calc ( 0 % + 100px ) calc ( 0 % + 100px ) , calc ( 0 % + 100px ) calc ( 0 % + 100px ) , calc ( 0 % + 100px ) calc ( 0 % + 100px ) " but got "100px 100px , 100px 100px , 100px 100px , 100px 100px "
FAIL Web Animations: property <background-position> from [unset] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (-0.25) should be [calc(0% - 20px)  calc(0% - 20px),  calc(0% - 20px)  calc(0% - 20px),  calc(0% - 20px)  calc(0% - 20px),  calc(0% - 20px)  calc(0% - 20px)] assert_equals: expected "calc ( 0 % - 20px ) calc ( 0 % - 20px ) , calc ( 0 % - 20px ) calc ( 0 % - 20px ) , calc ( 0 % - 20px ) calc ( 0 % - 20px ) , calc ( 0 % - 20px ) calc ( 0 % - 20px ) " but got "- 20px - 20px , - 20px - 20px , - 20px - 20px , - 20px - 20px "
FAIL Web Animations: property <background-position> from [unset] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0) should be [0% 0%, 0% 0%, 0% 0%, 0% 0%] assert_equals: expected "0 % 0 % , 0 % 0 % , 0 % 0 % , 0 % 0 % " but got "0px 0px , 0px 0px , 0px 0px , 0px 0px "
FAIL Web Animations: property <background-position> from [unset] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.25) should be [calc(0% + 20px)  calc(0% + 20px),  calc(0% + 20px)  calc(0% + 20px),  calc(0% + 20px)  calc(0% + 20px),  calc(0% + 20px)  calc(0% + 20px)] assert_equals: expected "calc ( 0 % + 20px ) calc ( 0 % + 20px ) , calc ( 0 % + 20px ) calc ( 0 % + 20px ) , calc ( 0 % + 20px ) calc ( 0 % + 20px ) , calc ( 0 % + 20px ) calc ( 0 % + 20px ) " but got "20px 20px , 20px 20px , 20px 20px , 20px 20px "
FAIL Web Animations: property <background-position> from [unset] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.5) should be [calc(0% + 40px)  calc(0% + 40px),  calc(0% + 40px)  calc(0% + 40px),  calc(0% + 40px)  calc(0% + 40px),  calc(0% + 40px)  calc(0% + 40px)] assert_equals: expected "calc ( 0 % + 40px ) calc ( 0 % + 40px ) , calc ( 0 % + 40px ) calc ( 0 % + 40px ) , calc ( 0 % + 40px ) calc ( 0 % + 40px ) , calc ( 0 % + 40px ) calc ( 0 % + 40px ) " but got "40px 40px , 40px 40px , 40px 40px , 40px 40px "
FAIL Web Animations: property <background-position> from [unset] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.75) should be [calc(0% + 60px)  calc(0% + 60px),  calc(0% + 60px)  calc(0% + 60px),  calc(0% + 60px)  calc(0% + 60px),  calc(0% + 60px)  calc(0% + 60px)] assert_equals: expected "calc ( 0 % + 60px ) calc ( 0 % + 60px ) , calc ( 0 % + 60px ) calc ( 0 % + 60px ) , calc ( 0 % + 60px ) calc ( 0 % + 60px ) , calc ( 0 % + 60px ) calc ( 0 % + 60px ) " but got "60px 60px , 60px 60px , 60px 60px , 60px 60px "
FAIL Web Animations: property <background-position> from [unset] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (1) should be [calc(0% + 80px)  calc(0% + 80px),  calc(0% + 80px)  calc(0% + 80px),  calc(0% + 80px)  calc(0% + 80px),  calc(0% + 80px)  calc(0% + 80px)] assert_equals: expected "calc ( 0 % + 80px ) calc ( 0 % + 80px ) , calc ( 0 % + 80px ) calc ( 0 % + 80px ) , calc ( 0 % + 80px ) calc ( 0 % + 80px ) , calc ( 0 % + 80px ) calc ( 0 % + 80px ) " but got "80px 80px , 80px 80px , 80px 80px , 80px 80px "
FAIL Web Animations: property <background-position> from [unset] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (1.25) should be [calc(0% + 100px) calc(0% + 100px), calc(0% + 100px) calc(0% + 100px), calc(0% + 100px) calc(0% + 100px), calc(0% + 100px) calc(0% + 100px)] assert_equals: expected "calc ( 0 % + 100px ) calc ( 0 % + 100px ) , calc ( 0 % + 100px ) calc ( 0 % + 100px ) , calc ( 0 % + 100px ) calc ( 0 % + 100px ) , calc ( 0 % + 100px ) calc ( 0 % + 100px ) " but got "100px 100px , 100px 100px , 100px 100px , 100px 100px "
PASS CSS Transitions: property <background-position> from [0px 0px, 0px 0px, 0px 0px, 0px 0px] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (-0.25) should be [-20px -20px, -20px -20px, -20px -20px, -20px -20px] 
PASS CSS Transitions: property <background-position> from [0px 0px, 0px 0px, 0px 0px, 0px 0px] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0) should be [  0px   0px,   0px   0px,   0px   0px,   0px   0px] 
PASS CSS Transitions: property <background-position> from [0px 0px, 0px 0px, 0px 0px, 0px 0px] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.25) should be [ 20px  20px,  20px  20px,  20px  20px,  20px  20px] 
PASS CSS Transitions: property <background-position> from [0px 0px, 0px 0px, 0px 0px, 0px 0px] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.5) should be [ 40px  40px,  40px  40px,  40px  40px,  40px  40px] 
PASS CSS Transitions: property <background-position> from [0px 0px, 0px 0px, 0px 0px, 0px 0px] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.75) should be [ 60px  60px,  60px  60px,  60px  60px,  60px  60px] 
PASS CSS Transitions: property <background-position> from [0px 0px, 0px 0px, 0px 0px, 0px 0px] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (1) should be [ 80px  80px,  80px  80px,  80px  80px,  80px  80px] 
PASS CSS Transitions: property <background-position> from [0px 0px, 0px 0px, 0px 0px, 0px 0px] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (1.25) should be [100px 100px, 100px 100px, 100px 100px, 100px 100px] 
PASS CSS Transitions with transition: all: property <background-position> from [0px 0px, 0px 0px, 0px 0px, 0px 0px] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (-0.25) should be [-20px -20px, -20px -20px, -20px -20px, -20px -20px] 
PASS CSS Transitions with transition: all: property <background-position> from [0px 0px, 0px 0px, 0px 0px, 0px 0px] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0) should be [  0px   0px,   0px   0px,   0px   0px,   0px   0px] 
PASS CSS Transitions with transition: all: property <background-position> from [0px 0px, 0px 0px, 0px 0px, 0px 0px] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.25) should be [ 20px  20px,  20px  20px,  20px  20px,  20px  20px] 
PASS CSS Transitions with transition: all: property <background-position> from [0px 0px, 0px 0px, 0px 0px, 0px 0px] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.5) should be [ 40px  40px,  40px  40px,  40px  40px,  40px  40px] 
PASS CSS Transitions with transition: all: property <background-position> from [0px 0px, 0px 0px, 0px 0px, 0px 0px] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.75) should be [ 60px  60px,  60px  60px,  60px  60px,  60px  60px] 
PASS CSS Transitions with transition: all: property <background-position> from [0px 0px, 0px 0px, 0px 0px, 0px 0px] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (1) should be [ 80px  80px,  80px  80px,  80px  80px,  80px  80px] 
PASS CSS Transitions with transition: all: property <background-position> from [0px 0px, 0px 0px, 0px 0px, 0px 0px] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (1.25) should be [100px 100px, 100px 100px, 100px 100px, 100px 100px] 
PASS CSS Animations: property <background-position> from [0px 0px, 0px 0px, 0px 0px, 0px 0px] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (-0.25) should be [-20px -20px, -20px -20px, -20px -20px, -20px -20px] 
PASS CSS Animations: property <background-position> from [0px 0px, 0px 0px, 0px 0px, 0px 0px] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0) should be [  0px   0px,   0px   0px,   0px   0px,   0px   0px] 
PASS CSS Animations: property <background-position> from [0px 0px, 0px 0px, 0px 0px, 0px 0px] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.25) should be [ 20px  20px,  20px  20px,  20px  20px,  20px  20px] 
PASS CSS Animations: property <background-position> from [0px 0px, 0px 0px, 0px 0px, 0px 0px] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.5) should be [ 40px  40px,  40px  40px,  40px  40px,  40px  40px] 
PASS CSS Animations: property <background-position> from [0px 0px, 0px 0px, 0px 0px, 0px 0px] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.75) should be [ 60px  60px,  60px  60px,  60px  60px,  60px  60px] 
PASS CSS Animations: property <background-position> from [0px 0px, 0px 0px, 0px 0px, 0px 0px] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (1) should be [ 80px  80px,  80px  80px,  80px  80px,  80px  80px] 
PASS CSS Animations: property <background-position> from [0px 0px, 0px 0px, 0px 0px, 0px 0px] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (1.25) should be [100px 100px, 100px 100px, 100px 100px, 100px 100px] 
PASS Web Animations: property <background-position> from [0px 0px, 0px 0px, 0px 0px, 0px 0px] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (-0.25) should be [-20px -20px, -20px -20px, -20px -20px, -20px -20px] 
PASS Web Animations: property <background-position> from [0px 0px, 0px 0px, 0px 0px, 0px 0px] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0) should be [  0px   0px,   0px   0px,   0px   0px,   0px   0px] 
PASS Web Animations: property <background-position> from [0px 0px, 0px 0px, 0px 0px, 0px 0px] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.25) should be [ 20px  20px,  20px  20px,  20px  20px,  20px  20px] 
PASS Web Animations: property <background-position> from [0px 0px, 0px 0px, 0px 0px, 0px 0px] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.5) should be [ 40px  40px,  40px  40px,  40px  40px,  40px  40px] 
PASS Web Animations: property <background-position> from [0px 0px, 0px 0px, 0px 0px, 0px 0px] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (0.75) should be [ 60px  60px,  60px  60px,  60px  60px,  60px  60px] 
PASS Web Animations: property <background-position> from [0px 0px, 0px 0px, 0px 0px, 0px 0px] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (1) should be [ 80px  80px,  80px  80px,  80px  80px,  80px  80px] 
PASS Web Animations: property <background-position> from [0px 0px, 0px 0px, 0px 0px, 0px 0px] to [80px 80px, 80px 80px, 80px 80px, 80px 80px] at (1.25) should be [100px 100px, 100px 100px, 100px 100px, 100px 100px] 
FAIL CSS Transitions: property <background-position> from [top 0px left 0px] to [left 80px top 80px] at (-0.25) should be [-20px -20px, -20px -20px, -20px -20px, -20px -20px] assert_equals: expected "- 20px - 20px , - 20px - 20px , - 20px - 20px , - 20px - 20px " but got "left - 20px top - 20px , - 20px - 20px , - 20px - 20px , - 20px - 20px "
FAIL CSS Transitions: property <background-position> from [top 0px left 0px] to [left 80px top 80px] at (0) should be [  0px   0px,   0px   0px,   0px   0px,   0px   0px] assert_equals: expected "0px 0px , 0px 0px , 0px 0px , 0px 0px " but got "left 0px top 0px , 0px 0px , 0px 0px , 0px 0px "
FAIL CSS Transitions: property <background-position> from [top 0px left 0px] to [left 80px top 80px] at (0.25) should be [ 20px  20px,  20px  20px,  20px  20px,  20px  20px] assert_equals: expected "20px 20px , 20px 20px , 20px 20px , 20px 20px " but got "left 20px top 20px , 20px 20px , 20px 20px , 20px 20px "
FAIL CSS Transitions: property <background-position> from [top 0px left 0px] to [left 80px top 80px] at (0.5) should be [ 40px  40px,  40px  40px,  40px  40px,  40px  40px] assert_equals: expected "40px 40px , 40px 40px , 40px 40px , 40px 40px " but got "left 40px top 40px , 40px 40px , 40px 40px , 40px 40px "
FAIL CSS Transitions: property <background-position> from [top 0px left 0px] to [left 80px top 80px] at (0.75) should be [ 60px  60px,  60px  60px,  60px  60px,  60px  60px] assert_equals: expected "60px 60px , 60px 60px , 60px 60px , 60px 60px " but got "left 60px top 60px , 60px 60px , 60px 60px , 60px 60px "
FAIL CSS Transitions: property <background-position> from [top 0px left 0px] to [left 80px top 80px] at (1) should be [ 80px  80px,  80px  80px,  80px  80px,  80px  80px] assert_equals: expected "80px 80px , 80px 80px , 80px 80px , 80px 80px " but got "left 80px top 80px , 80px 80px , 80px 80px , 80px 80px "
FAIL CSS Transitions: property <background-position> from [top 0px left 0px] to [left 80px top 80px] at (1.25) should be [100px 100px, 100px 100px, 100px 100px, 100px 100px] assert_equals: expected "100px 100px , 100px 100px , 100px 100px , 100px 100px " but got "left 100px top 100px , 100px 100px , 100px 100px , 100px 100px "
FAIL CSS Transitions with transition: all: property <background-position> from [top 0px left 0px] to [left 80px top 80px] at (-0.25) should be [-20px -20px, -20px -20px, -20px -20px, -20px -20px] assert_equals: expected "- 20px - 20px , - 20px - 20px , - 20px - 20px , - 20px - 20px " but got "left - 20px top - 20px , - 20px - 20px , - 20px - 20px , - 20px - 20px "
FAIL CSS Transitions with transition: all: property <background-position> from [top 0px left 0px] to [left 80px top 80px] at (0) should be [  0px   0px,   0px   0px,   0px   0px,   0px   0px] assert_equals: expected "0px 0px , 0px 0px , 0px 0px , 0px 0px " but got "left 0px top 0px , 0px 0px , 0px 0px , 0px 0px "
FAIL CSS Transitions with transition: all: property <background-position> from [top 0px left 0px] to [left 80px top 80px] at (0.25) should be [ 20px  20px,  20px  20px,  20px  20px,  20px  20px] assert_equals: expected "20px 20px , 20px 20px , 20px 20px , 20px 20px " but got "left 20px top 20px , 20px 20px , 20px 20px , 20px 20px "
FAIL CSS Transitions with transition: all: property <background-position> from [top 0px left 0px] to [left 80px top 80px] at (0.5) should be [ 40px  40px,  40px  40px,  40px  40px,  40px  40px] assert_equals: expected "40px 40px , 40px 40px , 40px 40px , 40px 40px " but got "left 40px top 40px , 40px 40px , 40px 40px , 40px 40px "
FAIL CSS Transitions with transition: all: property <background-position> from [top 0px left 0px] to [left 80px top 80px] at (0.75) should be [ 60px  60px,  60px  60px,  60px  60px,  60px  60px] assert_equals: expected "60px 60px , 60px 60px , 60px 60px , 60px 60px " but got "left 60px top 60px , 60px 60px , 60px 60px , 60px 60px "
FAIL CSS Transitions with transition: all: property <background-position> from [top 0px left 0px] to [left 80px top 80px] at (1) should be [ 80px  80px,  80px  80px,  80px  80px,  80px  80px] assert_equals: expected "80px 80px , 80px 80px , 80px 80px , 80px 80px " but got "left 80px top 80px , 80px 80px , 80px 80px , 80px 80px "
FAIL CSS Transitions with transition: all: property <background-position> from [top 0px left 0px] to [left 80px top 80px] at (1.25) should be [100px 100px, 100px 100px, 100px 100px, 100px 100px] assert_equals: expected "100px 100px , 100px 100px , 100px 100px , 100px 100px " but got "left 100px top 100px , 100px 100px , 100px 100px , 100px 100px "
PASS CSS Animations: property <background-position> from [top 0px left 0px] to [left 80px top 80px] at (-0.25) should be [-20px -20px, -20px -20px, -20px -20px, -20px -20px] 
PASS CSS Animations: property <background-position> from [top 0px left 0px] to [left 80px top 80px] at (0) should be [  0px   0px,   0px   0px,   0px   0px,   0px   0px] 
PASS CSS Animations: property <background-position> from [top 0px left 0px] to [left 80px top 80px] at (0.25) should be [ 20px  20px,  20px  20px,  20px  20px,  20px  20px] 
PASS CSS Animations: property <background-position> from [top 0px left 0px] to [left 80px top 80px] at (0.5) should be [ 40px  40px,  40px  40px,  40px  40px,  40px  40px] 
PASS CSS Animations: property <background-position> from [top 0px left 0px] to [left 80px top 80px] at (0.75) should be [ 60px  60px,  60px  60px,  60px  60px,  60px  60px] 
PASS CSS Animations: property <background-position> from [top 0px left 0px] to [left 80px top 80px] at (1) should be [ 80px  80px,  80px  80px,  80px  80px,  80px  80px] 
PASS CSS Animations: property <background-position> from [top 0px left 0px] to [left 80px top 80px] at (1.25) should be [100px 100px, 100px 100px, 100px 100px, 100px 100px] 
PASS Web Animations: property <background-position> from [top 0px left 0px] to [left 80px top 80px] at (-0.25) should be [-20px -20px, -20px -20px, -20px -20px, -20px -20px] 
PASS Web Animations: property <background-position> from [top 0px left 0px] to [left 80px top 80px] at (0) should be [  0px   0px,   0px   0px,   0px   0px,   0px   0px] 
PASS Web Animations: property <background-position> from [top 0px left 0px] to [left 80px top 80px] at (0.25) should be [ 20px  20px,  20px  20px,  20px  20px,  20px  20px] 
PASS Web Animations: property <background-position> from [top 0px left 0px] to [left 80px top 80px] at (0.5) should be [ 40px  40px,  40px  40px,  40px  40px,  40px  40px] 
PASS Web Animations: property <background-position> from [top 0px left 0px] to [left 80px top 80px] at (0.75) should be [ 60px  60px,  60px  60px,  60px  60px,  60px  60px] 
PASS Web Animations: property <background-position> from [top 0px left 0px] to [left 80px top 80px] at (1) should be [ 80px  80px,  80px  80px,  80px  80px,  80px  80px] 
PASS Web Animations: property <background-position> from [top 0px left 0px] to [left 80px top 80px] at (1.25) should be [100px 100px, 100px 100px, 100px 100px, 100px 100px] 
PASS CSS Transitions: property <background-position> from [0px 0px, 80px 0px] to [40px 40px, 80px 80px, 0px 80px] at (-0.25) should be [-10px -10px, 80px -20px, 0px -20px, 90px -10px] 
PASS CSS Transitions: property <background-position> from [0px 0px, 80px 0px] to [40px 40px, 80px 80px, 0px 80px] at (0) should be [  0px   0px, 80px   0px, 0px   0px, 80px   0px] 
PASS CSS Transitions: property <background-position> from [0px 0px, 80px 0px] to [40px 40px, 80px 80px, 0px 80px] at (0.25) should be [ 10px  10px, 80px  20px, 0px  20px, 70px  10px] 
PASS CSS Transitions: property <background-position> from [0px 0px, 80px 0px] to [40px 40px, 80px 80px, 0px 80px] at (0.5) should be [ 20px  20px, 80px  40px, 0px  40px, 60px  20px] 
PASS CSS Transitions: property <background-position> from [0px 0px, 80px 0px] to [40px 40px, 80px 80px, 0px 80px] at (0.75) should be [ 30px  30px, 80px  60px, 0px  60px, 50px  30px] 
PASS CSS Transitions: property <background-position> from [0px 0px, 80px 0px] to [40px 40px, 80px 80px, 0px 80px] at (1) should be [ 40px  40px, 80px  80px, 0px  80px, 40px  40px] 
PASS CSS Transitions: property <background-position> from [0px 0px, 80px 0px] to [40px 40px, 80px 80px, 0px 80px] at (1.25) should be [ 50px  50px, 80px 100px, 0px 100px, 30px  50px] 
PASS CSS Transitions with transition: all: property <background-position> from [0px 0px, 80px 0px] to [40px 40px, 80px 80px, 0px 80px] at (-0.25) should be [-10px -10px, 80px -20px, 0px -20px, 90px -10px] 
PASS CSS Transitions with transition: all: property <background-position> from [0px 0px, 80px 0px] to [40px 40px, 80px 80px, 0px 80px] at (0) should be [  0px   0px, 80px   0px, 0px   0px, 80px   0px] 
PASS CSS Transitions with transition: all: property <background-position> from [0px 0px, 80px 0px] to [40px 40px, 80px 80px, 0px 80px] at (0.25) should be [ 10px  10px, 80px  20px, 0px  20px, 70px  10px] 
PASS CSS Transitions with transition: all: property <background-position> from [0px 0px, 80px 0px] to [40px 40px, 80px 80px, 0px 80px] at (0.5) should be [ 20px  20px, 80px  40px, 0px  40px, 60px  20px] 
PASS CSS Transitions with transition: all: property <background-position> from [0px 0px, 80px 0px] to [40px 40px, 80px 80px, 0px 80px] at (0.75) should be [ 30px  30px, 80px  60px, 0px  60px, 50px  30px] 
PASS CSS Transitions with transition: all: property <background-position> from [0px 0px, 80px 0px] to [40px 40px, 80px 80px, 0px 80px] at (1) should be [ 40px  40px, 80px  80px, 0px  80px, 40px  40px] 
PASS CSS Transitions with transition: all: property <background-position> from [0px 0px, 80px 0px] to [40px 40px, 80px 80px, 0px 80px] at (1.25) should be [ 50px  50px, 80px 100px, 0px 100px, 30px  50px] 
PASS CSS Animations: property <background-position> from [0px 0px, 80px 0px] to [40px 40px, 80px 80px, 0px 80px] at (-0.25) should be [-10px -10px, 80px -20px, 0px -20px, 90px -10px] 
PASS CSS Animations: property <background-position> from [0px 0px, 80px 0px] to [40px 40px, 80px 80px, 0px 80px] at (0) should be [  0px   0px, 80px   0px, 0px   0px, 80px   0px] 
PASS CSS Animations: property <background-position> from [0px 0px, 80px 0px] to [40px 40px, 80px 80px, 0px 80px] at (0.25) should be [ 10px  10px, 80px  20px, 0px  20px, 70px  10px] 
PASS CSS Animations: property <background-position> from [0px 0px, 80px 0px] to [40px 40px, 80px 80px, 0px 80px] at (0.5) should be [ 20px  20px, 80px  40px, 0px  40px, 60px  20px] 
PASS CSS Animations: property <background-position> from [0px 0px, 80px 0px] to [40px 40px, 80px 80px, 0px 80px] at (0.75) should be [ 30px  30px, 80px  60px, 0px  60px, 50px  30px] 
PASS CSS Animations: property <background-position> from [0px 0px, 80px 0px] to [40px 40px, 80px 80px, 0px 80px] at (1) should be [ 40px  40px, 80px  80px, 0px  80px, 40px  40px] 
PASS CSS Animations: property <background-position> from [0px 0px, 80px 0px] to [40px 40px, 80px 80px, 0px 80px] at (1.25) should be [ 50px  50px, 80px 100px, 0px 100px, 30px  50px] 
PASS Web Animations: property <background-position> from [0px 0px, 80px 0px] to [40px 40px, 80px 80px, 0px 80px] at (-0.25) should be [-10px -10px, 80px -20px, 0px -20px, 90px -10px] 
PASS Web Animations: property <background-position> from [0px 0px, 80px 0px] to [40px 40px, 80px 80px, 0px 80px] at (0) should be [  0px   0px, 80px   0px, 0px   0px, 80px   0px] 
PASS Web Animations: property <background-position> from [0px 0px, 80px 0px] to [40px 40px, 80px 80px, 0px 80px] at (0.25) should be [ 10px  10px, 80px  20px, 0px  20px, 70px  10px] 
PASS Web Animations: property <background-position> from [0px 0px, 80px 0px] to [40px 40px, 80px 80px, 0px 80px] at (0.5) should be [ 20px  20px, 80px  40px, 0px  40px, 60px  20px] 
PASS Web Animations: property <background-position> from [0px 0px, 80px 0px] to [40px 40px, 80px 80px, 0px 80px] at (0.75) should be [ 30px  30px, 80px  60px, 0px  60px, 50px  30px] 
PASS Web Animations: property <background-position> from [0px 0px, 80px 0px] to [40px 40px, 80px 80px, 0px 80px] at (1) should be [ 40px  40px, 80px  80px, 0px  80px, 40px  40px] 
PASS Web Animations: property <background-position> from [0px 0px, 80px 0px] to [40px 40px, 80px 80px, 0px 80px] at (1.25) should be [ 50px  50px, 80px 100px, 0px 100px, 30px  50px]