diff --git a/Cargo.lock b/Cargo.lock
index 6c74aedeecb..afc1c369e68 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1065,7 +1065,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "117725a109d387c937a1533ce01b450cbde6b88abceea8473c4d7a85853cda3c"
 dependencies = [
  "lazy_static",
- "windows-sys 0.48.0",
+ "windows-sys 0.52.0",
 ]
 
 [[package]]
@@ -4331,7 +4331,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "fc2f4eb4bc735547cfed7c0a4922cbd04a4655978c09b54f1f7b228750664c34"
 dependencies = [
  "cfg-if",
- "windows-targets 0.48.5",
+ "windows-targets 0.52.6",
 ]
 
 [[package]]
@@ -6537,7 +6537,7 @@ dependencies = [
 [[package]]
 name = "selectors"
 version = "0.27.0"
-source = "git+https://github.com/servo/stylo?branch=2025-03-15#127952e9cc0d881c08ac5c41b626eb38674432e9"
+source = "git+https://github.com/servo/stylo?branch=2025-03-15#53bd9b280e15d8b55636b93001083d914ee2cb6b"
 dependencies = [
  "bitflags 2.9.0",
  "cssparser",
@@ -6822,7 +6822,7 @@ dependencies = [
 [[package]]
 name = "servo_arc"
 version = "0.4.0"
-source = "git+https://github.com/servo/stylo?branch=2025-03-15#127952e9cc0d881c08ac5c41b626eb38674432e9"
+source = "git+https://github.com/servo/stylo?branch=2025-03-15#53bd9b280e15d8b55636b93001083d914ee2cb6b"
 dependencies = [
  "serde",
  "stable_deref_trait",
@@ -7274,7 +7274,7 @@ dependencies = [
 [[package]]
 name = "stylo"
 version = "0.2.1"
-source = "git+https://github.com/servo/stylo?branch=2025-03-15#127952e9cc0d881c08ac5c41b626eb38674432e9"
+source = "git+https://github.com/servo/stylo?branch=2025-03-15#53bd9b280e15d8b55636b93001083d914ee2cb6b"
 dependencies = [
  "app_units",
  "arrayvec",
@@ -7332,7 +7332,7 @@ dependencies = [
 [[package]]
 name = "stylo_atoms"
 version = "0.2.0"
-source = "git+https://github.com/servo/stylo?branch=2025-03-15#127952e9cc0d881c08ac5c41b626eb38674432e9"
+source = "git+https://github.com/servo/stylo?branch=2025-03-15#53bd9b280e15d8b55636b93001083d914ee2cb6b"
 dependencies = [
  "string_cache",
  "string_cache_codegen",
@@ -7341,12 +7341,12 @@ dependencies = [
 [[package]]
 name = "stylo_config"
 version = "0.2.0"
-source = "git+https://github.com/servo/stylo?branch=2025-03-15#127952e9cc0d881c08ac5c41b626eb38674432e9"
+source = "git+https://github.com/servo/stylo?branch=2025-03-15#53bd9b280e15d8b55636b93001083d914ee2cb6b"
 
 [[package]]
 name = "stylo_derive"
 version = "0.2.0"
-source = "git+https://github.com/servo/stylo?branch=2025-03-15#127952e9cc0d881c08ac5c41b626eb38674432e9"
+source = "git+https://github.com/servo/stylo?branch=2025-03-15#53bd9b280e15d8b55636b93001083d914ee2cb6b"
 dependencies = [
  "darling",
  "proc-macro2",
@@ -7358,7 +7358,7 @@ dependencies = [
 [[package]]
 name = "stylo_dom"
 version = "0.2.0"
-source = "git+https://github.com/servo/stylo?branch=2025-03-15#127952e9cc0d881c08ac5c41b626eb38674432e9"
+source = "git+https://github.com/servo/stylo?branch=2025-03-15#53bd9b280e15d8b55636b93001083d914ee2cb6b"
 dependencies = [
  "bitflags 2.9.0",
  "stylo_malloc_size_of",
@@ -7367,7 +7367,7 @@ dependencies = [
 [[package]]
 name = "stylo_malloc_size_of"
 version = "0.2.0"
-source = "git+https://github.com/servo/stylo?branch=2025-03-15#127952e9cc0d881c08ac5c41b626eb38674432e9"
+source = "git+https://github.com/servo/stylo?branch=2025-03-15#53bd9b280e15d8b55636b93001083d914ee2cb6b"
 dependencies = [
  "app_units",
  "cssparser",
@@ -7384,12 +7384,12 @@ dependencies = [
 [[package]]
 name = "stylo_static_prefs"
 version = "0.2.0"
-source = "git+https://github.com/servo/stylo?branch=2025-03-15#127952e9cc0d881c08ac5c41b626eb38674432e9"
+source = "git+https://github.com/servo/stylo?branch=2025-03-15#53bd9b280e15d8b55636b93001083d914ee2cb6b"
 
 [[package]]
 name = "stylo_traits"
 version = "0.2.0"
-source = "git+https://github.com/servo/stylo?branch=2025-03-15#127952e9cc0d881c08ac5c41b626eb38674432e9"
+source = "git+https://github.com/servo/stylo?branch=2025-03-15#53bd9b280e15d8b55636b93001083d914ee2cb6b"
 dependencies = [
  "app_units",
  "bitflags 2.9.0",
@@ -7772,7 +7772,7 @@ dependencies = [
 [[package]]
 name = "to_shmem"
 version = "0.2.0"
-source = "git+https://github.com/servo/stylo?branch=2025-03-15#127952e9cc0d881c08ac5c41b626eb38674432e9"
+source = "git+https://github.com/servo/stylo?branch=2025-03-15#53bd9b280e15d8b55636b93001083d914ee2cb6b"
 dependencies = [
  "cssparser",
  "servo_arc",
@@ -7785,7 +7785,7 @@ dependencies = [
 [[package]]
 name = "to_shmem_derive"
 version = "0.1.0"
-source = "git+https://github.com/servo/stylo?branch=2025-03-15#127952e9cc0d881c08ac5c41b626eb38674432e9"
+source = "git+https://github.com/servo/stylo?branch=2025-03-15#53bd9b280e15d8b55636b93001083d914ee2cb6b"
 dependencies = [
  "darling",
  "proc-macro2",
@@ -8853,7 +8853,7 @@ version = "0.1.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cf221c93e13a30d793f7645a0e7762c55d169dbb0a49671918a2319d289b10bb"
 dependencies = [
- "windows-sys 0.48.0",
+ "windows-sys 0.52.0",
 ]
 
 [[package]]
diff --git a/components/layout_2020/dom.rs b/components/layout_2020/dom.rs
index f8b3d6f9c29..2e8a823c11e 100644
--- a/components/layout_2020/dom.rs
+++ b/components/layout_2020/dom.rs
@@ -34,6 +34,7 @@ pub struct InnerDOMLayoutData {
     pub(super) self_box: ArcRefCell<Option<LayoutBox>>,
     pub(super) pseudo_before_box: ArcRefCell<Option<LayoutBox>>,
     pub(super) pseudo_after_box: ArcRefCell<Option<LayoutBox>>,
+    pub(super) pseudo_marker_box: ArcRefCell<Option<LayoutBox>>,
 }
 
 /// A box that is stored in one of the `DOMLayoutData` slots.
@@ -222,6 +223,7 @@ where
         let cell = match pseudo_element_type {
             PseudoElement::Before => &data.pseudo_before_box,
             PseudoElement::After => &data.pseudo_after_box,
+            PseudoElement::Marker => &data.pseudo_marker_box,
             _ => unreachable!(
                 "Asked for box slot for unsupported pseudo-element: {:?}",
                 pseudo_element_type
@@ -235,6 +237,7 @@ where
         let cell = match pseudo_element_type {
             PseudoElement::Before => &data.pseudo_before_box,
             PseudoElement::After => &data.pseudo_after_box,
+            PseudoElement::Marker => &data.pseudo_marker_box,
             _ => unreachable!(
                 "Asked for box slot for unsupported pseudo-element: {:?}",
                 pseudo_element_type
@@ -248,6 +251,7 @@ where
         *data.self_box.borrow_mut() = None;
         *data.pseudo_before_box.borrow_mut() = None;
         *data.pseudo_after_box.borrow_mut() = None;
+        *data.pseudo_marker_box.borrow_mut() = None;
         // Stylo already takes care of removing all layout data
         // for DOM descendants of elements with `display: none`.
     }
diff --git a/components/layout_2020/dom_traversal.rs b/components/layout_2020/dom_traversal.rs
index bcb6555fd13..5800637c50f 100644
--- a/components/layout_2020/dom_traversal.rs
+++ b/components/layout_2020/dom_traversal.rs
@@ -236,6 +236,10 @@ fn traverse_element<'dom, Node>(
 ) where
     Node: NodeExt<'dom>,
 {
+    // Clear any existing pseudo-element box slot, because markers are not handled like
+    // `::before`` and `::after`. They are processed during box tree creation.
+    element.unset_pseudo_element_box(PseudoElement::Marker);
+
     let replaced = ReplacedContents::for_element(element, context);
     let style = element.style(context);
     match Display::from(style.get_box().display) {
diff --git a/components/layout_2020/flow/construct.rs b/components/layout_2020/flow/construct.rs
index ef73ee3d007..c7667231260 100644
--- a/components/layout_2020/flow/construct.rs
+++ b/components/layout_2020/flow/construct.rs
@@ -393,7 +393,7 @@ where
                 is_list_item: false,
             },
             NonReplacedContents::OfPseudoElement(contents).into(),
-            BoxSlot::dummy(),
+            info.node.pseudo_element_box_slot(PseudoElement::Marker),
         );
     }
 
@@ -405,7 +405,7 @@ where
     ) {
         self.block_level_boxes.push(BlockLevelJob {
             info: info.clone(),
-            box_slot: BoxSlot::dummy(),
+            box_slot: info.node.pseudo_element_box_slot(PseudoElement::Marker),
             kind: BlockLevelCreator::OutsideMarker {
                 contents,
                 list_item_style,
diff --git a/components/layout_2020/lists.rs b/components/layout_2020/lists.rs
index ee60a82ef01..d5a1f863865 100644
--- a/components/layout_2020/lists.rs
+++ b/components/layout_2020/lists.rs
@@ -19,11 +19,7 @@ pub(crate) fn make_marker<'dom, Node>(
 where
     Node: NodeExt<'dom>,
 {
-    // TODO: use `PseudoElement::Marker` when we add it.
-    let marker_info = info.pseudo(
-        context,
-        style::selector_parser::PseudoElement::ServoLegacyText,
-    )?;
+    let marker_info = info.pseudo(context, style::selector_parser::PseudoElement::Marker)?;
     let style = &marker_info.style;
     let list_style = style.get_list();
 
diff --git a/components/layout_2020/query.rs b/components/layout_2020/query.rs
index 108a4e0540c..cf745376ecf 100644
--- a/components/layout_2020/query.rs
+++ b/components/layout_2020/query.rs
@@ -131,7 +131,7 @@ pub fn process_resolved_style_request<'dom>(
         None => layout_element,
     };
 
-    let style = &*layout_element.resolved_style();
+    let style = &*layout_element.style(context);
     let longhand_id = match *property {
         PropertyId::NonCustom(id) => match id.longhand_or_shorthand() {
             Ok(longhand_id) => longhand_id,
@@ -1122,7 +1122,7 @@ where
     let element = node.as_element().unwrap();
     let parent_style = if node.is_connected() {
         if element.has_data() {
-            node.to_threadsafe().as_element().unwrap().resolved_style()
+            node.to_threadsafe().as_element().unwrap().style(context)
         } else {
             let mut tlc = ThreadLocalStyleContext::new();
             let mut context = StyleContext {
diff --git a/components/script/dom/window.rs b/components/script/dom/window.rs
index 863c2299081..8bfef17ee56 100644
--- a/components/script/dom/window.rs
+++ b/components/script/dom/window.rs
@@ -1262,6 +1262,7 @@ impl WindowMethods<crate::DomTypeHolder> for Window {
                 Some(PseudoElement::After)
             },
             Some(ref pseudo) if pseudo == "::selection" => Some(PseudoElement::Selection),
+            Some(ref pseudo) if pseudo == "::marker" => Some(PseudoElement::Marker),
             Some(ref pseudo) if pseudo.starts_with(':') => {
                 // Step 3.2: If type is failure, or is a ::slotted() or ::part()
                 // pseudo-element, let obj be null.
diff --git a/components/shared/script_layout/wrapper_traits.rs b/components/shared/script_layout/wrapper_traits.rs
index 3e021052280..20818bda9f5 100644
--- a/components/shared/script_layout/wrapper_traits.rs
+++ b/components/shared/script_layout/wrapper_traits.rs
@@ -363,22 +363,6 @@ pub trait ThreadSafeLayoutElement<'dom>:
             .clone()
     }
 
-    /// Returns the already resolved style of the node.
-    ///
-    /// This differs from `style(ctx)` in that if the pseudo-element has not yet
-    /// been computed it would panic.
-    ///
-    /// This should be used just for querying layout, or when we know the
-    /// element style is precomputed, not from general layout itself.
-    #[inline]
-    fn resolved_style(&self) -> Arc<ComputedValues> {
-        let data = self.style_data();
-        match self.pseudo_element() {
-            None => data.styles.primary().clone(),
-            Some(pseudo_element) => data.styles.pseudos.get(&pseudo_element).unwrap().clone(),
-        }
-    }
-
     fn is_shadow_host(&self) -> bool;
 
     /// Returns whether this node is a body element of an html element root
diff --git a/resources/servo.css b/resources/servo.css
index 579b5eed5c8..9800d67e3b9 100644
--- a/resources/servo.css
+++ b/resources/servo.css
@@ -174,14 +174,6 @@ svg > * {
   writing-mode: inherit;
 }
 
-/* style for text node. */
-*|*::-servo-legacy-text {
-    text-overflow: inherit;
-    overflow: inherit;
-    padding: unset;
-    margin: unset;
-}
-
 *|*::-servo-legacy-table-wrapper {
     display: table;
     border: none;
diff --git a/resources/user-agent.css b/resources/user-agent.css
index 94fe903824d..cea14741d30 100644
--- a/resources/user-agent.css
+++ b/resources/user-agent.css
@@ -422,3 +422,12 @@ iframe:fullscreen {
   border:none !important;
   padding:0 !important;
 }
+
+/* https://drafts.csswg.org/css-lists-3/#ua-stylesheet */
+*::marker {
+  text-align: end;
+  text-transform: none;
+  unicode-bidi: isolate;
+  font-variant-numeric: tabular-nums;
+  white-space: pre;
+}
diff --git a/tests/wpt/meta/css/css-position/position-absolute-dynamic-list-marker.html.ini b/tests/wpt/meta/css/css-position/position-absolute-dynamic-list-marker.html.ini
deleted file mode 100644
index 64d0ec15137..00000000000
--- a/tests/wpt/meta/css/css-position/position-absolute-dynamic-list-marker.html.ini
+++ /dev/null
@@ -1,2 +0,0 @@
-[position-absolute-dynamic-list-marker.html]
-  expected: FAIL
diff --git a/tests/wpt/meta/css/css-pseudo/marker-animate-002.html.ini b/tests/wpt/meta/css/css-pseudo/marker-animate-002.html.ini
new file mode 100644
index 00000000000..3c24a5f44a2
--- /dev/null
+++ b/tests/wpt/meta/css/css-pseudo/marker-animate-002.html.ini
@@ -0,0 +1,2 @@
+[marker-animate-002.html]
+  expected: FAIL
diff --git a/tests/wpt/meta/css/css-pseudo/marker-color.html.ini b/tests/wpt/meta/css/css-pseudo/marker-color.html.ini
deleted file mode 100644
index 030347fc02d..00000000000
--- a/tests/wpt/meta/css/css-pseudo/marker-color.html.ini
+++ /dev/null
@@ -1,2 +0,0 @@
-[marker-color.html]
-  expected: FAIL
diff --git a/tests/wpt/meta/css/css-pseudo/marker-computed-content.html.ini b/tests/wpt/meta/css/css-pseudo/marker-computed-content.html.ini
deleted file mode 100644
index 418c71dc4f6..00000000000
--- a/tests/wpt/meta/css/css-pseudo/marker-computed-content.html.ini
+++ /dev/null
@@ -1,30 +0,0 @@
-[marker-computed-content.html]
-  [Computed 'content' for list-item ::marker, variant string]
-    expected: FAIL
-
-  [Computed 'content' for list-item ::marker, variant image]
-    expected: FAIL
-
-  [Computed 'content' for list-item ::marker, variant none]
-    expected: FAIL
-
-  [Computed 'content' for non-list-item ::marker, variant string]
-    expected: FAIL
-
-  [Computed 'content' for non-list-item ::marker, variant image]
-    expected: FAIL
-
-  [Computed 'content' for non-list-item ::marker, variant none]
-    expected: FAIL
-
-  [Computed 'content' for list-item ::marker, variant default]
-    expected: FAIL
-
-  [Computed 'content' for list-item ::marker, variant normal]
-    expected: FAIL
-
-  [Computed 'content' for non-list-item ::marker, variant default]
-    expected: FAIL
-
-  [Computed 'content' for non-list-item ::marker, variant normal]
-    expected: FAIL
diff --git a/tests/wpt/meta/css/css-pseudo/marker-computed-size.html.ini b/tests/wpt/meta/css/css-pseudo/marker-computed-size.html.ini
index 2f611246d69..69e9d816c12 100644
--- a/tests/wpt/meta/css/css-pseudo/marker-computed-size.html.ini
+++ b/tests/wpt/meta/css/css-pseudo/marker-computed-size.html.ini
@@ -8,9 +8,6 @@
   [String ::marker]
     expected: FAIL
 
-  [::marker with no box due to 'list-style']
-    expected: FAIL
-
   [::marker with custom string contents]
     expected: FAIL
 
@@ -19,6 +16,3 @@
 
   [::marker with custom string and image contents]
     expected: FAIL
-
-  [::marker with no box due to 'content']
-    expected: FAIL
diff --git a/tests/wpt/meta/css/css-pseudo/marker-default-styles.html.ini b/tests/wpt/meta/css/css-pseudo/marker-default-styles.html.ini
index 89ad7c32b19..71470dd9983 100644
--- a/tests/wpt/meta/css/css-pseudo/marker-default-styles.html.ini
+++ b/tests/wpt/meta/css/css-pseudo/marker-default-styles.html.ini
@@ -2,95 +2,47 @@
   [Computed value of 'font-variant-numeric' for outside symbol]
     expected: FAIL
 
-  [Computed value of 'text-transform' for outside symbol]
-    expected: FAIL
-
   [Computed value of 'text-indent' for outside symbol]
     expected: FAIL
 
   [Computed value of 'font-variant-numeric' for outside decimal]
     expected: FAIL
 
-  [Computed value of 'text-transform' for outside decimal]
-    expected: FAIL
-
   [Computed value of 'text-indent' for outside decimal]
     expected: FAIL
 
   [Computed value of 'font-variant-numeric' for outside string]
     expected: FAIL
 
-  [Computed value of 'text-transform' for outside string]
-    expected: FAIL
-
   [Computed value of 'text-indent' for outside string]
     expected: FAIL
 
   [Computed value of 'font-variant-numeric' for outside marker]
     expected: FAIL
 
-  [Computed value of 'text-transform' for outside marker]
-    expected: FAIL
-
   [Computed value of 'text-indent' for outside marker]
     expected: FAIL
 
   [Computed value of 'font-variant-numeric' for inside symbol]
     expected: FAIL
 
-  [Computed value of 'text-transform' for inside symbol]
-    expected: FAIL
-
   [Computed value of 'text-indent' for inside symbol]
     expected: FAIL
 
   [Computed value of 'font-variant-numeric' for inside decimal]
     expected: FAIL
 
-  [Computed value of 'text-transform' for inside decimal]
-    expected: FAIL
-
   [Computed value of 'text-indent' for inside decimal]
     expected: FAIL
 
   [Computed value of 'font-variant-numeric' for inside string]
     expected: FAIL
 
-  [Computed value of 'text-transform' for inside string]
-    expected: FAIL
-
   [Computed value of 'text-indent' for inside string]
     expected: FAIL
 
   [Computed value of 'font-variant-numeric' for inside marker]
     expected: FAIL
 
-  [Computed value of 'text-transform' for inside marker]
-    expected: FAIL
-
   [Computed value of 'text-indent' for inside marker]
     expected: FAIL
-
-  [Computed value of 'unicode-bidi' for outside symbol]
-    expected: FAIL
-
-  [Computed value of 'unicode-bidi' for outside decimal]
-    expected: FAIL
-
-  [Computed value of 'unicode-bidi' for outside string]
-    expected: FAIL
-
-  [Computed value of 'unicode-bidi' for outside marker]
-    expected: FAIL
-
-  [Computed value of 'unicode-bidi' for inside symbol]
-    expected: FAIL
-
-  [Computed value of 'unicode-bidi' for inside decimal]
-    expected: FAIL
-
-  [Computed value of 'unicode-bidi' for inside string]
-    expected: FAIL
-
-  [Computed value of 'unicode-bidi' for inside marker]
-    expected: FAIL
diff --git a/tests/wpt/meta/css/css-pseudo/marker-display-computed.html.ini b/tests/wpt/meta/css/css-pseudo/marker-display-computed.html.ini
index 3e1830fb087..d300a2f0b6e 100644
--- a/tests/wpt/meta/css/css-pseudo/marker-display-computed.html.ini
+++ b/tests/wpt/meta/css/css-pseudo/marker-display-computed.html.ini
@@ -1,16 +1,4 @@
 [marker-display-computed.html]
-  [Computed 'display' for inside ::marker, variant default]
-    expected: FAIL
-
-  [Computed 'display' for inside ::marker, variant color]
-    expected: FAIL
-
-  [Computed 'display' for inside ::marker, variant string]
-    expected: FAIL
-
-  [Computed 'display' for inside ::marker, variant content]
-    expected: FAIL
-
   [Computed 'display' for outside ::marker, variant default]
     expected: FAIL
 
diff --git a/tests/wpt/meta/css/css-pseudo/marker-letter-spacing.html.ini b/tests/wpt/meta/css/css-pseudo/marker-letter-spacing.html.ini
new file mode 100644
index 00000000000..fc95d410898
--- /dev/null
+++ b/tests/wpt/meta/css/css-pseudo/marker-letter-spacing.html.ini
@@ -0,0 +1,2 @@
+[marker-letter-spacing.html]
+  expected: FAIL
diff --git a/tests/wpt/meta/css/css-pseudo/marker-line-height.html.ini b/tests/wpt/meta/css/css-pseudo/marker-line-height.html.ini
deleted file mode 100644
index 0099d3c8150..00000000000
--- a/tests/wpt/meta/css/css-pseudo/marker-line-height.html.ini
+++ /dev/null
@@ -1,2 +0,0 @@
-[marker-line-height.html]
-  expected: FAIL
diff --git a/tests/wpt/meta/css/css-pseudo/marker-variable-computed-style.html.ini b/tests/wpt/meta/css/css-pseudo/marker-variable-computed-style.html.ini
deleted file mode 100644
index a91b0c48adf..00000000000
--- a/tests/wpt/meta/css/css-pseudo/marker-variable-computed-style.html.ini
+++ /dev/null
@@ -1,6 +0,0 @@
-[marker-variable-computed-style.html]
-  [getComputedStyle() for opacity defined by variable in ::marker]
-    expected: FAIL
-
-  [getComputedStyle() for color defined by variable in ::marker]
-    expected: FAIL
diff --git a/tests/wpt/meta/css/css-pseudo/marker-word-spacing.html.ini b/tests/wpt/meta/css/css-pseudo/marker-word-spacing.html.ini
new file mode 100644
index 00000000000..4c6f4402bd5
--- /dev/null
+++ b/tests/wpt/meta/css/css-pseudo/marker-word-spacing.html.ini
@@ -0,0 +1,2 @@
+[marker-word-spacing.html]
+  expected: FAIL
diff --git a/tests/wpt/meta/css/css-pseudo/parsing/marker-supported-properties-in-animation.html.ini b/tests/wpt/meta/css/css-pseudo/parsing/marker-supported-properties-in-animation.html.ini
index 672f877b6d3..7fa1ec08034 100644
--- a/tests/wpt/meta/css/css-pseudo/parsing/marker-supported-properties-in-animation.html.ini
+++ b/tests/wpt/meta/css/css-pseudo/parsing/marker-supported-properties-in-animation.html.ini
@@ -1,2 +1,237 @@
 [marker-supported-properties-in-animation.html]
-  expected: ERROR
+  [Animation of font in ::marker]
+    expected: FAIL
+
+  [Animation of font-family in ::marker]
+    expected: FAIL
+
+  [Animation of font-feature-settings in ::marker]
+    expected: FAIL
+
+  [Animation of font-kerning in ::marker]
+    expected: FAIL
+
+  [Animation of font-size in ::marker]
+    expected: FAIL
+
+  [Animation of font-size-adjust in ::marker]
+    expected: FAIL
+
+  [Animation of font-stretch in ::marker]
+    expected: FAIL
+
+  [Animation of font-style in ::marker]
+    expected: FAIL
+
+  [Animation of font-synthesis in ::marker]
+    expected: FAIL
+
+  [Animation of font-synthesis-small-caps in ::marker]
+    expected: FAIL
+
+  [Animation of font-synthesis-style in ::marker]
+    expected: FAIL
+
+  [Animation of font-synthesis-weight in ::marker]
+    expected: FAIL
+
+  [Animation of font-variant in ::marker]
+    expected: FAIL
+
+  [Animation of font-variant-caps in ::marker]
+    expected: FAIL
+
+  [Animation of font-variant-east-asian in ::marker]
+    expected: FAIL
+
+  [Animation of font-variant-ligatures in ::marker]
+    expected: FAIL
+
+  [Animation of font-variant-numeric in ::marker]
+    expected: FAIL
+
+  [Animation of font-variant-position in ::marker]
+    expected: FAIL
+
+  [Animation of font-weight in ::marker]
+    expected: FAIL
+
+  [Animation of line-height in ::marker]
+    expected: FAIL
+
+  [Animation of white-space in ::marker]
+    expected: FAIL
+
+  [Animation of color in ::marker]
+    expected: FAIL
+
+  [Animation of text-combine-upright in ::marker]
+    expected: FAIL
+
+  [Animation of content in ::marker]
+    expected: FAIL
+
+  [Animation of hyphens in ::marker]
+    expected: FAIL
+
+  [Animation of letter-spacing in ::marker]
+    expected: FAIL
+
+  [Animation of line-break in ::marker]
+    expected: FAIL
+
+  [Animation of overflow-wrap in ::marker]
+    expected: FAIL
+
+  [Animation of tab-size in ::marker]
+    expected: FAIL
+
+  [Animation of text-transform in ::marker]
+    expected: FAIL
+
+  [Animation of word-break in ::marker]
+    expected: FAIL
+
+  [Animation of word-spacing in ::marker]
+    expected: FAIL
+
+  [Animation of text-decoration-skip-ink in ::marker]
+    expected: FAIL
+
+  [Animation of text-emphasis in ::marker]
+    expected: FAIL
+
+  [Animation of text-emphasis-color in ::marker]
+    expected: FAIL
+
+  [Animation of text-emphasis-position in ::marker]
+    expected: FAIL
+
+  [Animation of text-emphasis-style in ::marker]
+    expected: FAIL
+
+  [Animation of text-shadow in ::marker]
+    expected: FAIL
+
+  [Animation of cursor in ::marker]
+    expected: FAIL
+
+  [Animation of list-style in ::marker]
+    expected: FAIL
+
+  [Transition of font in ::marker]
+    expected: FAIL
+
+  [Transition of font-feature-settings in ::marker]
+    expected: FAIL
+
+  [Transition of font-kerning in ::marker]
+    expected: FAIL
+
+  [Transition of font-size in ::marker]
+    expected: FAIL
+
+  [Transition of font-size-adjust in ::marker]
+    expected: FAIL
+
+  [Transition of font-stretch in ::marker]
+    expected: FAIL
+
+  [Transition of font-synthesis in ::marker]
+    expected: FAIL
+
+  [Transition of font-synthesis-small-caps in ::marker]
+    expected: FAIL
+
+  [Transition of font-synthesis-style in ::marker]
+    expected: FAIL
+
+  [Transition of font-synthesis-weight in ::marker]
+    expected: FAIL
+
+  [Transition of font-variant in ::marker]
+    expected: FAIL
+
+  [Transition of font-variant-caps in ::marker]
+    expected: FAIL
+
+  [Transition of font-variant-east-asian in ::marker]
+    expected: FAIL
+
+  [Transition of font-variant-ligatures in ::marker]
+    expected: FAIL
+
+  [Transition of font-variant-numeric in ::marker]
+    expected: FAIL
+
+  [Transition of font-variant-position in ::marker]
+    expected: FAIL
+
+  [Transition of font-weight in ::marker]
+    expected: FAIL
+
+  [Transition of line-height in ::marker]
+    expected: FAIL
+
+  [Transition of color in ::marker]
+    expected: FAIL
+
+  [Transition of text-combine-upright in ::marker]
+    expected: FAIL
+
+  [Transition of hyphens in ::marker]
+    expected: FAIL
+
+  [Transition of letter-spacing in ::marker]
+    expected: FAIL
+
+  [Transition of line-break in ::marker]
+    expected: FAIL
+
+  [Transition of tab-size in ::marker]
+    expected: FAIL
+
+  [Transition of word-break in ::marker]
+    expected: FAIL
+
+  [Transition of word-spacing in ::marker]
+    expected: FAIL
+
+  [Transition of text-decoration-skip-ink in ::marker]
+    expected: FAIL
+
+  [Transition of text-emphasis in ::marker]
+    expected: FAIL
+
+  [Transition of text-emphasis-color in ::marker]
+    expected: FAIL
+
+  [Transition of text-emphasis-position in ::marker]
+    expected: FAIL
+
+  [Transition of text-emphasis-style in ::marker]
+    expected: FAIL
+
+  [Transition of text-shadow in ::marker]
+    expected: FAIL
+
+  [Transition of display in ::marker]
+    expected: FAIL
+
+  [Transition of position in ::marker]
+    expected: FAIL
+
+  [Transition of float in ::marker]
+    expected: FAIL
+
+  [Transition of list-style in ::marker]
+    expected: FAIL
+
+  [Transition of list-style-image in ::marker]
+    expected: FAIL
+
+  [Transition of list-style-position in ::marker]
+    expected: FAIL
+
+  [Transition of list-style-type in ::marker]
+    expected: FAIL
diff --git a/tests/wpt/meta/css/css-pseudo/parsing/marker-supported-properties.html.ini b/tests/wpt/meta/css/css-pseudo/parsing/marker-supported-properties.html.ini
index cb4247c08b9..91f55c091f7 100644
--- a/tests/wpt/meta/css/css-pseudo/parsing/marker-supported-properties.html.ini
+++ b/tests/wpt/meta/css/css-pseudo/parsing/marker-supported-properties.html.ini
@@ -1,28 +1,13 @@
 [marker-supported-properties.html]
-  [Property font value 'italic small-caps 900 expanded 25px / 50px Ahem' in ::marker]
-    expected: FAIL
-
-  [Property font-family value 'Ahem' in ::marker]
-    expected: FAIL
-
   [Property font-feature-settings value '"smcp"' in ::marker]
     expected: FAIL
 
   [Property font-kerning value 'none' in ::marker]
     expected: FAIL
 
-  [Property font-size value '25px' in ::marker]
-    expected: FAIL
-
   [Property font-size-adjust value '1' in ::marker]
     expected: FAIL
 
-  [Property font-stretch value 'expanded' in ::marker]
-    expected: FAIL
-
-  [Property font-style value 'italic' in ::marker]
-    expected: FAIL
-
   [Property font-synthesis value 'none' in ::marker]
     expected: FAIL
 
@@ -35,12 +20,6 @@
   [Property font-synthesis-weight value 'none' in ::marker]
     expected: FAIL
 
-  [Property font-variant value 'small-caps' in ::marker]
-    expected: FAIL
-
-  [Property font-variant-caps value 'small-caps' in ::marker]
-    expected: FAIL
-
   [Property font-variant-east-asian value 'full-width' in ::marker]
     expected: FAIL
 
@@ -53,99 +32,24 @@
   [Property font-variant-position value 'sub' in ::marker]
     expected: FAIL
 
-  [Property font-weight value '900' in ::marker]
-    expected: FAIL
-
-  [Property line-height value '50px' in ::marker]
-    expected: FAIL
-
-  [Property white-space value 'nowrap' in ::marker]
-    expected: FAIL
-
-  [Property color value 'rgb(0, 100, 200)' in ::marker]
-    expected: FAIL
-
   [Property text-combine-upright value 'all' in ::marker]
     expected: FAIL
 
-  [Property unicode-bidi value 'plaintext' in ::marker]
-    expected: FAIL
-
-  [Property direction value 'rtl' in ::marker]
-    expected: FAIL
-
-  [Property content value '"foo"' in ::marker]
-    expected: FAIL
-
-  [Property animation value '1s linear 2s infinite alternate forwards paused anim' in ::marker]
-    expected: FAIL
-
-  [Property animation-delay value '1s' in ::marker]
-    expected: FAIL
-
-  [Property animation-direction value 'alternate' in ::marker]
-    expected: FAIL
-
-  [Property animation-duration value '2s' in ::marker]
-    expected: FAIL
-
-  [Property animation-fill-mode value 'forwards' in ::marker]
-    expected: FAIL
-
-  [Property animation-iteration-count value 'infinite' in ::marker]
-    expected: FAIL
-
-  [Property animation-name value 'anim' in ::marker]
-    expected: FAIL
-
-  [Property animation-play-state value 'paused' in ::marker]
-    expected: FAIL
-
-  [Property animation-timing-function value 'linear' in ::marker]
-    expected: FAIL
-
   [Property animation-composition value 'add' in ::marker]
     expected: FAIL
 
-  [Property transition value 'display 1s linear 2s' in ::marker]
-    expected: FAIL
-
-  [Property transition-delay value '1s' in ::marker]
-    expected: FAIL
-
-  [Property transition-duration value '2s' in ::marker]
-    expected: FAIL
-
-  [Property transition-property value 'display' in ::marker]
-    expected: FAIL
-
-  [Property transition-timing-function value 'linear' in ::marker]
-    expected: FAIL
-
   [Property hyphens value 'none' in ::marker]
     expected: FAIL
 
-  [Property letter-spacing value '10px' in ::marker]
-    expected: FAIL
-
   [Property line-break value 'anywhere' in ::marker]
     expected: FAIL
 
-  [Property overflow-wrap value 'anywhere' in ::marker]
-    expected: FAIL
-
   [Property tab-size value '10px' in ::marker]
     expected: FAIL
 
-  [Property text-transform value 'uppercase' in ::marker]
-    expected: FAIL
-
   [Property word-break value 'break-word' in ::marker]
     expected: FAIL
 
-  [Property word-spacing value '10px' in ::marker]
-    expected: FAIL
-
   [Property text-decoration-skip-ink value 'none' in ::marker]
     expected: FAIL
 
@@ -161,9 +65,6 @@
   [Property text-emphasis-style value 'dot' in ::marker]
     expected: FAIL
 
-  [Property text-shadow value 'rgb(0, 255, 0) 1px 2px 3px' in ::marker]
-    expected: FAIL
-
   [Property display value 'none' in ::marker]
     expected: FAIL
 
@@ -184,6 +85,3 @@
 
   [Property list-style-type value 'decimal' in ::marker]
     expected: FAIL
-
-  [Property cursor value 'move' in ::marker]
-    expected: FAIL
diff --git a/tests/wpt/meta/css/css-pseudo/parsing/tree-abiding-pseudo-elements.html.ini b/tests/wpt/meta/css/css-pseudo/parsing/tree-abiding-pseudo-elements.html.ini
index bc76fcdd096..02c230e4e14 100644
--- a/tests/wpt/meta/css/css-pseudo/parsing/tree-abiding-pseudo-elements.html.ini
+++ b/tests/wpt/meta/css/css-pseudo/parsing/tree-abiding-pseudo-elements.html.ini
@@ -1,13 +1,4 @@
 [tree-abiding-pseudo-elements.html]
-  ["::marker" should be a valid selector]
-    expected: FAIL
-
-  ["*::marker" should be a valid selector]
-    expected: FAIL
-
-  ["foo.bar[baz\]::marker" should be a valid selector]
-    expected: FAIL
-
   ["::placeholder" should be a valid selector]
     expected: FAIL
 
diff --git a/tests/wpt/meta/css/css-transitions/non-rendered-element-004.tentative.html.ini b/tests/wpt/meta/css/css-transitions/non-rendered-element-004.tentative.html.ini
index 4f24c094b1e..490354e16b0 100644
--- a/tests/wpt/meta/css/css-transitions/non-rendered-element-004.tentative.html.ini
+++ b/tests/wpt/meta/css/css-transitions/non-rendered-element-004.tentative.html.ini
@@ -1,4 +1,4 @@
 [non-rendered-element-004.tentative.html]
+  expected: TIMEOUT
   [Transitions on ::marker pseudo-elements are canceled when the parent display type is no longer list-item]
-    expected: FAIL
-
+    expected: TIMEOUT
diff --git a/tests/wpt/meta/css/css-values/ch-pseudo-recalc-on-font-load.html.ini b/tests/wpt/meta/css/css-values/ch-pseudo-recalc-on-font-load.html.ini
index 53b82763175..167325f552a 100644
--- a/tests/wpt/meta/css/css-values/ch-pseudo-recalc-on-font-load.html.ini
+++ b/tests/wpt/meta/css/css-values/ch-pseudo-recalc-on-font-load.html.ini
@@ -10,6 +10,3 @@
 
   [ch in pseudo-element ::first-line should be recalculated after loading a web font]
     expected: FAIL
-
-  [ch in pseudo-element ::marker should be recalculated after loading a web font]
-    expected: FAIL
diff --git a/tests/wpt/meta/css/cssom/getComputedStyle-pseudo.html.ini b/tests/wpt/meta/css/cssom/getComputedStyle-pseudo.html.ini
index 8907ffcf007..a53c62b49d5 100644
--- a/tests/wpt/meta/css/cssom/getComputedStyle-pseudo.html.ini
+++ b/tests/wpt/meta/css/cssom/getComputedStyle-pseudo.html.ini
@@ -26,9 +26,6 @@
   [Unknown pseudo-element with a known identifier: highlight(name)]
     expected: PRECONDITION_FAILED
 
-  [Unknown pseudo-element with a known identifier: marker]
-    expected: PRECONDITION_FAILED
-
   [Unknown pseudo-element with a known identifier: placeholder]
     expected: PRECONDITION_FAILED