diff --git a/LayoutTests/imported/w3c/web-platform-tests/wai-aria/role/roles-expected.txt b/LayoutTests/imported/w3c/web-platform-tests/wai-aria/role/roles-expected.txt
index 453dfd15b0bf..953ba11cde83 100644
--- a/LayoutTests/imported/w3c/web-platform-tests/wai-aria/role/roles-expected.txt
+++ b/LayoutTests/imported/w3c/web-platform-tests/wai-aria/role/roles-expected.txt
@@ -72,7 +72,7 @@ PASS role: definition
 PASS role: deletion
 PASS role: dialog
 PASS role: document
-FAIL role: emphasis assert_equals: <div role="emphasis">x</div> expected "emphasis" but got "generic"
+PASS role: emphasis
 PASS role: feed
 PASS role: figure
 PASS role: generic
@@ -98,7 +98,7 @@ PASS role: separator
 PASS role: slider
 PASS role: spinbutton
 PASS role: status
-FAIL role: strong assert_equals: <div role="strong">x</div> expected "strong" but got "generic"
+PASS role: strong
 PASS role: subscript
 PASS role: suggestion
 PASS role: superscript
diff --git a/Source/WebCore/accessibility/AXCoreObject.h b/Source/WebCore/accessibility/AXCoreObject.h
index a2d93b89ccb9..6ab34dbcfbe7 100644
--- a/Source/WebCore/accessibility/AXCoreObject.h
+++ b/Source/WebCore/accessibility/AXCoreObject.h
@@ -149,6 +149,7 @@ enum class AccessibilityRole {
     DocumentArticle,
     DocumentMath,
     DocumentNote,
+    Emphasis,
     Feed,
     Figure,
     Footer,
@@ -224,6 +225,7 @@ enum class AccessibilityRole {
     SpinButtonPart,
     Splitter,
     StaticText,
+    Strong,
     Subscript,
     Suggestion,
     Summary,
@@ -330,6 +332,8 @@ ALWAYS_INLINE String accessibilityRoleToString(AccessibilityRole role)
         return "DocumentMath"_s;
     case AccessibilityRole::DocumentNote:
         return "DocumentNote"_s;
+    case AccessibilityRole::Emphasis:
+        return "Emphasis"_s;
     case AccessibilityRole::Feed:
         return "Feed"_s;
     case AccessibilityRole::Figure:
@@ -480,6 +484,8 @@ ALWAYS_INLINE String accessibilityRoleToString(AccessibilityRole role)
         return "Splitter"_s;
     case AccessibilityRole::StaticText:
         return "StaticText"_s;
+    case AccessibilityRole::Strong:
+        return "Strong"_s;
     case AccessibilityRole::Subscript:
         return "Subscript"_s;
     case AccessibilityRole::Suggestion:
diff --git a/Source/WebCore/accessibility/AccessibilityObject.cpp b/Source/WebCore/accessibility/AccessibilityObject.cpp
index 52cf02d7ce08..bd0ba400b7c7 100644
--- a/Source/WebCore/accessibility/AccessibilityObject.cpp
+++ b/Source/WebCore/accessibility/AccessibilityObject.cpp
@@ -2667,6 +2667,7 @@ static void initializeRoleMap()
         { "doc-subtitle"_s, AccessibilityRole::Heading },
         { "doc-tip"_s, AccessibilityRole::DocumentNote },
         { "doc-toc"_s, AccessibilityRole::LandmarkNavigation },
+        { "emphasis"_s, AccessibilityRole::Emphasis },
         { "figure"_s, AccessibilityRole::Figure },
         { "generic"_s, AccessibilityRole::Generic },
         // The mappings for 'graphics-*' roles are defined in this spec: https://w3c.github.io/graphics-aam/
@@ -2727,6 +2728,7 @@ static void initializeRoleMap()
         { "subscript"_s, AccessibilityRole::Subscript },
         { "suggestion"_s, AccessibilityRole::Suggestion },
         { "superscript"_s, AccessibilityRole::Superscript },
+        { "strong"_s, AccessibilityRole::Strong },
         { "switch"_s, AccessibilityRole::Switch },
         { "tab"_s, AccessibilityRole::Tab },
         { "tablist"_s, AccessibilityRole::TabList },
diff --git a/Source/WebCore/accessibility/atspi/AccessibilityObjectAtspi.cpp b/Source/WebCore/accessibility/atspi/AccessibilityObjectAtspi.cpp
index 5187b2fa356d..b25638bae400 100644
--- a/Source/WebCore/accessibility/atspi/AccessibilityObjectAtspi.cpp
+++ b/Source/WebCore/accessibility/atspi/AccessibilityObjectAtspi.cpp
@@ -354,6 +354,7 @@ static Atspi::Role atspiRole(AccessibilityRole role)
     case AccessibilityRole::Mark:
         return Atspi::Role::Mark;
     case AccessibilityRole::Details:
+    case AccessibilityRole::Emphasis:
     case AccessibilityRole::Ignored:
     case AccessibilityRole::Incrementor:
     case AccessibilityRole::LineBreak:
@@ -367,6 +368,7 @@ static Atspi::Role atspiRole(AccessibilityRole role)
     case AccessibilityRole::RubyText:
     case AccessibilityRole::SliderThumb:
     case AccessibilityRole::SpinButtonPart:
+    case AccessibilityRole::Strong:
     case AccessibilityRole::Summary:
     case AccessibilityRole::TableHeaderContainer:
     case AccessibilityRole::Suggestion:
diff --git a/Source/WebCore/accessibility/ios/WebAccessibilityObjectWrapperIOS.mm b/Source/WebCore/accessibility/ios/WebAccessibilityObjectWrapperIOS.mm
index 9243ad6bd349..8625d702de04 100644
--- a/Source/WebCore/accessibility/ios/WebAccessibilityObjectWrapperIOS.mm
+++ b/Source/WebCore/accessibility/ios/WebAccessibilityObjectWrapperIOS.mm
@@ -1033,6 +1033,7 @@ - (BOOL)determineIsAccessibilityElement
     case AccessibilityRole::Document:
     case AccessibilityRole::DocumentArticle:
     case AccessibilityRole::DocumentNote:
+    case AccessibilityRole::Emphasis:
     case AccessibilityRole::Feed:
     case AccessibilityRole::Figure:
     case AccessibilityRole::Footer:
@@ -1081,6 +1082,7 @@ - (BOOL)determineIsAccessibilityElement
     case AccessibilityRole::ScrollBar:
     case AccessibilityRole::SpinButtonPart:
     case AccessibilityRole::Splitter:
+    case AccessibilityRole::Strong:
     case AccessibilityRole::Subscript:
     case AccessibilityRole::Suggestion:
     case AccessibilityRole::Superscript:
diff --git a/Source/WebCore/accessibility/mac/AccessibilityObjectMac.mm b/Source/WebCore/accessibility/mac/AccessibilityObjectMac.mm
index fdd67fecc840..09fe4fad313d 100644
--- a/Source/WebCore/accessibility/mac/AccessibilityObjectMac.mm
+++ b/Source/WebCore/accessibility/mac/AccessibilityObjectMac.mm
@@ -906,6 +906,7 @@ PlatformRoleMap createPlatformRoleMap()
         { AccessibilityRole::DocumentArticle, NSAccessibilityGroupRole },
         { AccessibilityRole::DocumentMath, NSAccessibilityGroupRole },
         { AccessibilityRole::DocumentNote, NSAccessibilityGroupRole },
+        { AccessibilityRole::Emphasis, NSAccessibilityGroupRole },
         { AccessibilityRole::UserInterfaceTooltip, NSAccessibilityGroupRole },
         { AccessibilityRole::Tab, NSAccessibilityRadioButtonRole },
         { AccessibilityRole::TabList, NSAccessibilityTabGroupRole },
@@ -954,6 +955,7 @@ PlatformRoleMap createPlatformRoleMap()
         { AccessibilityRole::Caption, NSAccessibilityGroupRole },
         { AccessibilityRole::Deletion, NSAccessibilityGroupRole },
         { AccessibilityRole::Insertion, NSAccessibilityGroupRole },
+        { AccessibilityRole::Strong, NSAccessibilityGroupRole },
         { AccessibilityRole::Subscript, NSAccessibilityGroupRole },
         { AccessibilityRole::Superscript, NSAccessibilityGroupRole },
         { AccessibilityRole::Model, NSAccessibilityGroupRole },