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-cascade

Spec: CSS Cascading ↗

Runs: Chrome 155.0.8039.0 (wpt@508cc6a62, 2026-09-03) | Firefox 157.0a1 (wpt@508cc6a62, 2026-09-03) | Safari 251 preview (wpt@5ce815a83, 2026-08-27) | Ladybird 1.0-56c61 (wpt@8fdda8ce4, 2026-09-03) | Servo Servo 0.6 (wpt@09159dcb3, 2026-09-02) | Blitz 188486089 (wpt@a95401e4e, 2026-09-02)

Sort areas: alphabetical | by subtest count

Area	Chrome	Firefox	Safari	Ladybird	Servo	Blitz
Total	NO DATA	NO DATA	84.3%1643/1950	74.9%1460/1950	55.1%1075/1950	8.6%167/1950
parsing	NO DATA	NO DATA	100.0%58/58	100.0%58/58	77.6%45/58	17.2%10/58

Test	Chrome	Firefox	Safari	Ladybird	Servo	Blitz
all-prop-001.html	PASS	PASS	PASS	FAIL	PASS	FAIL
all-prop-002.html	PASS	PASS	PASS	PASS	PASS	FAIL
all-prop-inherit-color.html	PASS	PASS	PASS	PASS	PASS	PASS
all-prop-initial-color.html	PASS	PASS	PASS	PASS	PASS	PASS
all-prop-initial-visited.html	PASS	FAIL	PASS	FAIL	FAIL	FAIL
all-prop-initial-xml.html	489/489	398/489	438/489	340/489	244/489	0/489
all-prop-revert-color.html	PASS	PASS	PASS	PASS	PASS	PASS
all-prop-revert-layer-noop.html	NOT RUN	NOT RUN	NOT RUN	NOT RUN	NOT RUN	0/114
all-prop-revert-layer-noop.html?include=0	15/15	15/15	15/15	15/15	15/15	NOT RUN
all-prop-revert-layer-noop.html?include=1	15/15	15/15	15/15	15/15	15/15	NOT RUN
all-prop-revert-layer-noop.html?include=2	14/14	14/14	14/14	14/14	14/14	NOT RUN
all-prop-revert-layer-noop.html?include=3	14/14	14/14	14/14	14/14	14/14	NOT RUN
all-prop-revert-layer-noop.html?include=4	14/14	14/14	14/14	14/14	14/14	NOT RUN
all-prop-revert-layer-noop.html?include=5	14/14	14/14	14/14	14/14	14/14	NOT RUN
all-prop-revert-layer-noop.html?include=6	14/14	14/14	14/14	14/14	14/14	NOT RUN
all-prop-revert-layer-noop.html?include=7	14/14	14/14	14/14	14/14	14/14	NOT RUN
all-prop-revert-layer.html	371/372	368/372	363/372	308/372	237/372	0/372
all-prop-revert-noop.html	NOT RUN	NOT RUN	NOT RUN	NOT RUN	NOT RUN	0/114
all-prop-revert-noop.html?include=0	15/15	15/15	15/15	15/15	15/15	NOT RUN
all-prop-revert-noop.html?include=1	15/15	15/15	15/15	15/15	15/15	NOT RUN
all-prop-revert-noop.html?include=2	14/14	14/14	14/14	14/14	14/14	NOT RUN
all-prop-revert-noop.html?include=3	14/14	14/14	14/14	14/14	13/14	NOT RUN
all-prop-revert-noop.html?include=4	14/14	14/14	14/14	14/14	13/14	NOT RUN
all-prop-revert-noop.html?include=5	14/14	14/14	14/14	14/14	14/14	NOT RUN
all-prop-revert-noop.html?include=6	14/14	14/14	14/14	14/14	14/14	NOT RUN
all-prop-revert-noop.html?include=7	14/14	14/14	14/14	14/14	14/14	NOT RUN
all-prop-revert-visited.html	PASS	PASS	PASS	PASS	PASS	PASS
all-prop-unset-color.html	PASS	PASS	PASS	PASS	PASS	PASS
all-prop-unset-visited.html	PASS	PASS	PASS	PASS	PASS	PASS
at-scope-parsing.html	43/43	43/43	43/43	43/43	28/43	0/43
at-scope-relative-syntax.html	8/8	8/8	8/8	8/8	0/8	0/8
idlharness.html	34/34	34/34	34/34	34/34	22/34	0/34
import-conditional-001.html	PASS	PASS	PASS	PASS	PASS	PASS
import-conditional-002.html	PASS	PASS	PASS	PASS	PASS	PASS
import-conditions.html	29/29	29/29	28/29	29/29	23/29	0/29
import-removal.html	PASS	PASS	PASS	PASS	PASS	FAIL
important-prop.html	PASS	PASS	PASS	PASS	PASS	PASS
important-vs-inline-001.html	4/4	4/4	4/4	4/4	4/4	4/4
important-vs-inline-002.html	4/4	4/4	4/4	4/4	4/4	4/4
important-vs-inline-003.html	PASS	PASS	PASS	PASS	PASS	PASS
inherit-initial.html	4/4	4/4	4/4	4/4	4/4	4/4
initial-background-color.html	PASS	PASS	PASS	PASS	PASS	PASS
initial-color-background-001.html	PASS	PASS	PASS	PASS	PASS	PASS
inline-style-background.html	PASS	PASS	PASS	PASS	PASS	PASS
inline-style-revert-layer-crash.html	PASS	PASS	PASS	PASS	PASS	PASS
layer-basic.html	34/34	34/34	34/34	34/34	34/34	34/34
layer-counter-style-override.html	4/4	4/4	4/4	4/4	0/4	0/4
layer-cssom-order-reverse-at-property.html	2/2	2/2	2/2	1/2	2/2	0/2
layer-cssom-order-reverse.html	4/4	4/4	4/4	3/4	4/4	0/4
layer-font-face-override.html	4/4	4/4	4/4	3/4	2/4	4/4
layer-import.html	24/24	24/24	24/24	24/24	24/24	0/24
layer-important.html	9/9	9/9	9/9	9/9	9/9	9/9
layer-keyframes-override.html	4/4	4/4	4/4	1/4	4/4	4/4
layer-media-query.html	8/8	8/8	8/8	8/8	8/8	0/8
layer-media-toggle.html	PASS	PASS	PASS	PASS	PASS	PASS
layer-namespace-sandwich-crash.html	PASS	PASS	PASS	PASS	PASS	PASS
layer-property-override.html	4/4	4/4	4/4	1/4	4/4	4/4
layer-replaceSync-clears-stale.html	PASS	PASS	PASS	PASS	FAIL	FAIL
layer-rules-cssom.html	9/9	9/9	9/9	9/9	9/9	0/9
layer-slotted-rule.html	PASS	PASS	PASS	PASS	PASS	FAIL
layer-statement-before-import.html	7/7	7/7	7/7	7/7	7/7	0/7
layer-statement-copy-crash.html	PASS	PASS	PASS	PASS	PASS	PASS
layer-stylesheet-multi-adoption.html	PASS	PASS	PASS	FAIL	FAIL	FAIL
layer-stylesheet-sharing-important.html	PASS	PASS	PASS	PASS	PASS	PASS
layer-stylesheet-sharing.html	PASS	PASS	PASS	PASS	PASS	PASS
layer-vs-inline-style.html	4/4	4/4	4/4	4/4	4/4	1/4
presentational-hints-cascade.html	3/3	3/3	3/3	3/3	3/3	3/3
presentational-hints-rollback.html	16/16	14/16	16/16	14/16	16/16	16/16
revert-layer-001.html	PASS	PASS	PASS	PASS	PASS	PASS
revert-layer-002.html	PASS	PASS	PASS	PASS	PASS	PASS
revert-layer-003.html	PASS	PASS	PASS	PASS	PASS	PASS
revert-layer-004.html	PASS	PASS	PASS	PASS	PASS	FAIL
revert-layer-005.html	PASS	PASS	PASS	PASS	PASS	PASS
revert-layer-006.html	PASS	PASS	PASS	PASS	PASS	PASS
revert-layer-007.html	PASS	PASS	PASS	PASS	PASS	PASS
revert-layer-008.html	PASS	PASS	PASS	PASS	PASS	PASS
revert-layer-009.html	PASS	PASS	PASS	FAIL	PASS	PASS
revert-layer-010.html	PASS	FAIL	PASS	PASS	PASS	PASS
revert-layer-011.html	PASS	PASS	PASS	PASS	PASS	PASS
revert-layer-012.html	PASS	PASS	PASS	FAIL	PASS	PASS
revert-layer-013.html	PASS	PASS	PASS	PASS	PASS	FAIL
revert-layer-014.html	PASS	PASS	PASS	PASS	PASS	FAIL
revert-layer-015.html	PASS	PASS	PASS	PASS	PASS	PASS
revert-rule-basic.html	4/4	4/4	4/4	0/4	4/4	4/4
revert-rule-custom-property.html	PASS	PASS	PASS	FAIL	PASS	PASS
revert-rule-cycle.tentative.html	2/2	0/2	0/2	0/2	0/2	NOT RUN
revert-rule-important.html	3/3	3/3	3/3	2/3	3/3	3/3
revert-rule-layer.html	2/2	2/2	2/2	0/2	2/2	2/2
revert-rule-revert-layer.html	5/5	5/5	5/5	0/5	5/5	5/5
revert-rule-shadow.html	12/12	12/12	12/12	6/12	12/12	0/12
revert-val-001.html	PASS	PASS	PASS	PASS	PASS	PASS
revert-val-002.html	PASS	PASS	PASS	PASS	PASS	PASS
revert-val-003.html	PASS	PASS	PASS	PASS	PASS	PASS
revert-val-004.html	PASS	PASS	PASS	PASS	PASS	PASS
revert-val-005.html	2/2	2/2	2/2	1/2	2/2	2/2
revert-val-006.html	PASS	FAIL	PASS	FAIL	PASS	PASS
revert-val-007.html	PASS	FAIL	PASS	FAIL	PASS	PASS
revert-val-008.html	PASS	FAIL	PASS	PASS	FAIL	FAIL
revert-val-009.html	PASS	PASS	PASS	PASS	FAIL	FAIL
revert-val-010.html	PASS	FAIL	PASS	PASS	FAIL	FAIL
revert-val-011.html	3/3	3/3	3/3	3/3	3/3	3/3
scope-container.html	PASS	PASS	PASS	PASS	FAIL	FAIL
scope-cssom.html	13/13	13/13	13/13	13/13	0/13	0/13
scope-declaration-list-crash.html	PASS	PASS	PASS	PASS	PASS	PASS
scope-declarations.html	5/5	5/5	5/5	5/5	0/5	0/5
scope-deep.html	PASS	FAIL	PASS	PASS	FAIL	FAIL
scope-evaluation.html	26/26	26/26	26/26	26/26	9/26	0/26
scope-featureless.html	PASS	PASS	PASS	PASS	PASS	PASS
scope-focus.html	4/4	4/4	4/4	4/4	0/4	0/4
scope-has-crash.html	PASS	PASS	PASS	PASS	PASS	PASS
scope-hover.html	4/4	4/4	4/4	4/4	0/4	0/4
scope-implicit-001-print.html	PASS	PASS	NOT RUN	NOT RUN	NOT RUN	FAIL
scope-implicit-002-print.html	PASS	PASS	NOT RUN	NOT RUN	NOT RUN	FAIL
scope-implicit-003-print.html	PASS	PASS	NOT RUN	NOT RUN	NOT RUN	FAIL
scope-implicit-004-print.xhtml	PASS	PASS	NOT RUN	NOT RUN	NOT RUN	FAIL
scope-implicit-005-print.html	PASS	PASS	NOT RUN	NOT RUN	NOT RUN	FAIL
scope-implicit-006-print.html	PASS	PASS	NOT RUN	NOT RUN	NOT RUN	FAIL
scope-implicit-crash-print.html	PASS	PASS	NOT RUN	NOT RUN	NOT RUN	PASS
scope-implicit-external.html	2/2	2/2	2/2	2/2	0/2	0/2
scope-implicit.html	11/11	11/11	11/11	11/11	2/11	0/11
scope-import-implicit.html	1/2	1/2	1/2	2/2	1/2	1/2
scope-import-inner-scope.html	2/2	1/2	1/2	2/2	1/2	1/2
scope-import-multiple.html	2/2	1/2	1/2	2/2	1/2	1/2
scope-import-parent-pseudo.html	2/2	0/2	0/2	2/2	0/2	0/2
scope-import-scope-end.html	2/2	1/2	1/2	2/2	1/2	1/2
scope-import-scope-pseudo.html	PASS	FAIL	FAIL	PASS	FAIL	FAIL
scope-import-scope-start.html	2/2	1/2	1/2	2/2	1/2	1/2
scope-inner-pseudo-scope-crash.html	PASS	PASS	PASS	PASS	PASS	PASS
scope-invalidation.html	29/29	29/29	29/29	29/29	0/29	0/29
scope-layer.html	PASS	PASS	PASS	PASS	FAIL	FAIL
scope-media.html	PASS	PASS	PASS	PASS	FAIL	FAIL
scope-name-defining-rules.html	4/4	4/4	4/4	4/4	0/4	0/4
scope-nesting.html	24/24	24/24	24/24	24/24	0/24	0/24
scope-overlapping-has.html	PASS	PASS	PASS	PASS	FAIL	FAIL
scope-part.html	PASS	PASS	PASS	PASS	FAIL	FAIL
scope-proximity.html	5/5	5/5	5/5	5/5	0/5	0/5
scope-pseudo-element.html	PASS	PASS	PASS	PASS	FAIL	FAIL
scope-shadow-sharing.html	PASS	PASS	PASS	PASS	FAIL	FAIL
scope-shadow.html	9/9	9/9	9/9	9/9	0/9	0/9
scope-specificity.html	11/11	11/11	11/11	11/11	0/11	0/11
scope-starting-style.html	PASS	PASS	PASS	FAIL	FAIL	FAIL
scope-style-sharing-001.html	13/13	13/13	13/13	13/13	0/13	0/13
scope-style-sharing-002.html	13/13	13/13	13/13	13/13	0/13	0/13
scope-supports.html	PASS	PASS	PASS	PASS	FAIL	FAIL
scope-ua-shadow-host.html	PASS	PASS	PASS	PASS	FAIL	FAIL
scope-visited-cssom.html	16/16	16/16	15/16	16/16	8/16	0/16
scope-visited.html	PASS	FAIL	PASS	FAIL	FAIL	FAIL
tons-of-declarations-crash.html	PASS	PASS	PASS	PASS	PASS	PASS
unset-val-001.html	PASS	PASS	PASS	PASS	PASS	PASS
unset-val-002.html	PASS	PASS	PASS	PASS	PASS	PASS
unset-value-storage.html	PASS	PASS	PASS	PASS	PASS	FAIL