WPT

This page compares scores on the Web Platform Tests across web engines, using the latest master runs from wpt.fyi and Blitz's own test runner.

wpt / css / css-variables

Spec: CSS Variables ↗

Runs: Chrome 158.0.8110.0 (wpt@51af97519, 2026-10-17) | Firefox 160.0a1 (wpt@51af97519, 2026-10-17) | Safari 254 preview (wpt@d6658f1eb, 2026-10-17) | Ladybird 1.0-44fe0 (wpt@831ff48a8, 2026-10-18) | Servo Servo 0.7 (wpt@df642c414, 2026-10-17) | Blitz fb8d6c15e (wpt@cd1d8aa5b, 2026-10-17)

Score history

Percentage of subtests passing over time, one master run per day. Every engine's percentage is relative to the same denominator: the total number of subtests known to any engine in the latest runs (so lines are not distorted by tests being added to WPT, and an engine that skips tests is not flattered for it).

1 month 3 months 6 months 1 year 2 years 4 years All time

Sort: alphabetical | by subtest count

Area	Chrome	Firefox	Safari	Ladybird	Servo	Blitz
Total	90.5%701/774	89.1%690/774	95.8%742/774	87.3%676/774	82.6%640/774	78.0%604/774

Test	Chrome	Firefox	Safari	Ladybird	Servo	Blitz
Total	90.5%701/774	89.1%690/774	95.8%742/774	87.3%676/774	82.6%640/774	78.0%604/774
css-variable-change-style-001.html	9/9	9/9	9/9	9/9	9/9	9/9
css-variable-change-style-002.html	3/3	3/3	3/3	3/3	3/3	3/3
css-vars-custom-property-case-sensitive-001.html	PASS	PASS	PASS	PASS	PASS	PASS
css-vars-custom-property-inheritance.html	PASS	PASS	PASS	PASS	PASS	PASS
custom-properties-inherit.html	PASS	PASS	PASS	PASS	PASS	PASS
long-variable-reference-crash.html	PASS	PASS	PASS	PASS	PASS	PASS
missing-closing-nested-fallback-crash.html	PASS	PASS	PASS	PASS	PASS	PASS
missing-closing-nested-fallback.html	PASS	PASS	PASS	PASS	PASS	PASS
registered-property-light-dark.html	PASS	PASS	PASS	PASS	PASS	PASS
revert-in-fallback.html	4/4	4/4	4/4	4/4	4/4	4/4
revert-layer-in-fallback.html	4/4	3/4	4/4	3/4	3/4	3/4
revert-rule-in-fallback.html	4/4	3/4	4/4	0/4	3/4	3/4
revert-rule-to-var.html	PASS	PASS	PASS	FAIL	PASS	PASS
test_variable_legal_values.html	23/23	23/23	23/23	23/23	23/23	23/23
transition-with-attribute-taint.html	PASS	PASS	PASS	PASS	PASS	PASS
url-syntax-crash.html	PASS	PASS	PASS	PASS	PASS	PASS
url-token-serialization.html	6/6	6/6	6/6	6/6	6/6	6/6
var-ident-function.html	1/5	1/5	5/5	3/5	1/5	1/5
var-parsing.html	10/18	10/18	18/18	13/18	10/18	10/18
variable-animation-from-to.html	4/4	4/4	4/4	4/4	4/4	0/4
variable-animation-guaranteed-invalid.html	6/6	6/6	6/6	6/6	6/6	6/6
variable-animation-over-transition.html	4/4	4/4	4/4	4/4	4/4	0/4
variable-animation-substitute-into-keyframe-shorthand.html	2/2	2/2	2/2	0/2	2/2	0/2
variable-animation-substitute-into-keyframe-transform.html	2/2	2/2	2/2	2/2	2/2	0/2
variable-animation-substitute-into-keyframe.html	2/2	2/2	2/2	2/2	2/2	0/2
variable-animation-substitute-within-keyframe-fallback.html	2/2	2/2	2/2	2/2	2/2	0/2
variable-animation-substitute-within-keyframe-multiple.html	2/2	2/2	2/2	2/2	2/2	0/2
variable-animation-substitute-within-keyframe.html	2/2	2/2	2/2	2/2	2/2	0/2
variable-animation-to-only.html	2/2	2/2	2/2	2/2	2/2	0/2
variable-created-document.html	2/2	2/2	2/2	2/2	2/2	0/2
variable-created-element.html	3/3	3/3	3/3	3/3	3/3	3/3
variable-css-wide-keywords-after-substitution.html	6/6	4/6	6/6	4/6	4/6	4/6
variable-css-wide-keywords.html	30/30	27/30	30/30	27/30	27/30	27/30
variable-cssText.html	11/11	11/11	10/11	8/11	11/11	11/11
variable-cycles.html	11/11	11/11	11/11	11/11	11/11	11/11
variable-declaration-01.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-declaration-02.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-declaration-03.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-declaration-04.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-declaration-05.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-declaration-06.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-declaration-07.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-declaration-08.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-declaration-09.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-declaration-10.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-declaration-11.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-declaration-12.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-declaration-13.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-declaration-14.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-declaration-15.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-declaration-16.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-declaration-17.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-declaration-18.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-declaration-19.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-declaration-20.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-declaration-21.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-declaration-22.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-declaration-23.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-declaration-24.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-declaration-25.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-declaration-26.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-declaration-29.html	FAIL	FAIL	PASS	PASS	FAIL	FAIL
variable-declaration-30.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-declaration-31.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-declaration-32.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-declaration-33.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-declaration-34.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-declaration-35.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-declaration-36.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-declaration-37.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-declaration-38.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-declaration-39.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-declaration-40.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-declaration-41.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-declaration-42.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-declaration-43.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-declaration-44.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-declaration-45.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-declaration-46.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-declaration-47.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-declaration-48.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-declaration-49.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-declaration-50.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-declaration-51.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-declaration-52.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-declaration-53.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-declaration-54.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-declaration-55.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-declaration-56.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-declaration-57.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-declaration-58.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-declaration-59.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-declaration-60.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-definition-border-shorthand-serialize.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-definition-cascading.html	9/9	9/9	9/9	9/9	9/9	9/9
variable-definition-keywords.html	8/8	8/8	8/8	8/8	8/8	8/8
variable-definition.html	59/73	59/73	59/73	53/73	59/73	58/73
variable-empty-name-reserved.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-exponential-blowup.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-external-declaration-01.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-external-font-face-01.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-external-reference-01.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-external-supports-01.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-first-letter.html	6/6	6/6	4/6	6/6	0/6	2/6
variable-first-line.html	6/6	6/6	4/6	6/6	0/6	2/6
variable-font-face-01.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-font-face-02.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-generated-content-dynamic-001.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-invalid-recovery.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-invalidation.html	4/4	4/4	4/4	4/4	4/4	2/4
variable-presentation-attribute.html	35/48	34/48	36/48	32/48	24/48	26/48
variable-pseudo-element.html	3/3	3/3	3/3	3/3	3/3	1/3
variable-recalc-with-initial.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-reference-01.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-reference-02.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-reference-03.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-reference-04.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-reference-05.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-reference-06.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-reference-07.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-reference-08.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-reference-09.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-reference-10.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-reference-11.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-reference-12.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-reference-13.html	PASS	PASS	PASS	FAIL	PASS	PASS
variable-reference-14.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-reference-15.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-reference-16.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-reference-17.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-reference-18.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-reference-19.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-reference-20.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-reference-21.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-reference-22.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-reference-23.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-reference-24.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-reference-25.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-reference-26.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-reference-27.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-reference-28.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-reference-29.html	PASS	PASS	PASS	FAIL	PASS	PASS
variable-reference-30.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-reference-31.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-reference-32.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-reference-33.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-reference-34.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-reference-35.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-reference-36.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-reference-37.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-reference-38.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-reference-39.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-reference-40.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-reference-cssom.html	2/2	2/2	2/2	2/2	2/2	2/2
variable-reference-name-substitution-attr-taint.html	6/9	6/9	9/9	8/9	6/9	6/9
variable-reference-name-substitution.html	3/24	3/24	24/24	20/24	3/24	3/24
variable-reference-perspective-origin.html	6/6	6/6	6/6	0/6	0/6	6/6
variable-reference-refresh.html	2/2	2/2	2/2	2/2	2/2	0/2
variable-reference-shorthands-cssom.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-reference-shorthands.html	16/16	16/16	16/16	16/16	16/16	16/16
variable-reference-variable.html	2/2	2/2	2/2	2/2	2/2	2/2
variable-reference-visited.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-reference-without-whitespace.html	PASS	PASS	PASS	PASS	FAIL	FAIL
variable-reference.html	11/18	10/18	18/18	17/18	10/18	10/18
variable-resolution-during-prioritary-properties.html	5/5	5/5	5/5	5/5	5/5	5/5
variable-substitution-background-properties.html	10/10	10/10	10/10	10/10	10/10	10/10
variable-substitution-basic.html	13/13	13/13	13/13	13/13	13/13	13/13
variable-substitution-filters.html	7/7	7/7	7/7	7/7	7/7	7/7
variable-substitution-replaced-size.html	6/6	6/6	6/6	6/6	6/6	6/6
variable-substitution-shadow-properties.html	3/3	3/3	3/3	3/3	3/3	3/3
variable-substitution-shorthands.html	51/51	51/51	51/51	37/51	51/51	48/51
variable-substitution-variable-declaration.html	31/31	30/31	30/31	30/31	30/31	24/31
variable-supports-01.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-supports-02.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-supports-03.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-supports-04.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-supports-05.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-supports-06.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-supports-07.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-supports-08.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-supports-09.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-supports-10.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-supports-11.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-supports-12.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-supports-13.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-supports-14.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-supports-15.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-supports-16.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-supports-17.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-supports-18.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-supports-19.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-supports-20.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-supports-21.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-supports-22.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-supports-23.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-supports-24.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-supports-25.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-supports-26.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-supports-27.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-supports-28.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-supports-29.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-supports-30.html	FAIL	FAIL	PASS	PASS	FAIL	FAIL
variable-supports-31.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-supports-32.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-supports-33.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-supports-34.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-supports-35.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-supports-36.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-supports-37.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-supports-38.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-supports-39.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-supports-40.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-supports-41.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-supports-42.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-supports-43.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-supports-44.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-supports-45.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-supports-46.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-supports-47.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-supports-48.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-supports-49.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-supports-50.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-supports-51.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-supports-52.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-supports-53.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-supports-54.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-supports-55.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-supports-56.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-supports-57.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-supports-58.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-supports-59.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-supports-60.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-supports-61.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-supports-62.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-supports-63.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-supports-64.html	FAIL	FAIL	PASS	PASS	FAIL	FAIL
variable-supports-65.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-supports-66.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-supports-67.html	PASS	PASS	PASS	PASS	PASS	PASS
variable-transitions-transition-property-all-before-value.html	4/4	4/4	4/4	4/4	4/4	0/4
variable-transitions-value-before-transition-property-all.html	4/4	4/4	4/4	4/4	4/4	0/4
variables-animation-math-functions.html	36/36	36/36	36/36	26/36	14/36	14/36
variables-substitute-guaranteed-invalid.html	3/3	3/3	3/3	3/3	3/3	3/3
vars-background-shorthand-001.html	PASS	FAIL	PASS	PASS	PASS	PASS
vars-border-shorthand-serialize.html	3/3	3/3	3/3	3/3	3/3	3/3
vars-font-shorthand-001.html	PASS	PASS	PASS	PASS	PASS	PASS
whitespace-in-fallback-crash.html	PASS	PASS	PASS	PASS	PASS	PASS
wide-keyword-fallback-001.html	PASS	PASS	PASS	PASS	PASS	PASS
wide-keyword-fallback-002.html	PASS	PASS	PASS	PASS	PASS	PASS