diff --git a/Libraries/LibWeb/CSS/Parser/Parser.cpp b/Libraries/LibWeb/CSS/Parser/Parser.cpp
index da48c2dd2e2..8c35548e0e4 100644
--- a/Libraries/LibWeb/CSS/Parser/Parser.cpp
+++ b/Libraries/LibWeb/CSS/Parser/Parser.cpp
@@ -1309,15 +1309,21 @@ Vector<Vector<ComponentValue>> Parser::parse_a_comma_separated_list_of_component
     Vector<Vector<ComponentValue>> groups;
 
     // 3. While input is not empty:
+    bool just_consumed_comma = false;
     while (!input.is_empty()) {
 
         // 1. Consume a list of component values from input, with <comma-token> as the stop token, and append the result to groups.
         groups.append(consume_a_list_of_component_values(input, Token::Type::Comma));
 
         // 2. Discard a token from input.
-        input.discard_a_token();
+        just_consumed_comma = input.consume_a_token().is(Token::Type::Comma);
     }
 
+    // AD-HOC: Also append an empty group if there was a trailing comma.
+    // Some related spec discussion: https://github.com/w3c/csswg-drafts/issues/11254
+    if (just_consumed_comma)
+        groups.append({});
+
     // 4. Return groups.
     return groups;
 }
diff --git a/Tests/LibWeb/Text/expected/wpt-import/css/css-fonts/parsing/font-variation-settings-invalid.txt b/Tests/LibWeb/Text/expected/wpt-import/css/css-fonts/parsing/font-variation-settings-invalid.txt
index c7bbf8da29d..2574d9ba10b 100644
--- a/Tests/LibWeb/Text/expected/wpt-import/css/css-fonts/parsing/font-variation-settings-invalid.txt
+++ b/Tests/LibWeb/Text/expected/wpt-import/css/css-fonts/parsing/font-variation-settings-invalid.txt
@@ -2,8 +2,7 @@ Harness status: OK
 
 Found 18 tests
 
-17 Pass
-1 Fail
+18 Pass
 Pass	e.style['font-variation-settings'] = "700" should not set the property value
 Pass	e.style['font-variation-settings'] = "\"XHGT\"" should not set the property value
 Pass	e.style['font-variation-settings'] = "wght 700" should not set the property value
@@ -16,7 +15,7 @@ Pass	e.style['font-variation-settings'] = "\"abcA9\" 0.5" should not set the pro
 Pass	e.style['font-variation-settings'] = "'wght' 200 'abcd' 400" should not set the property value
 Pass	e.style['font-variation-settings'] = "'a' 1234" should not set the property value
 Pass	e.style['font-variation-settings'] = "'abcde' 1234" should not set the property value
-Fail	e.style['font-variation-settings'] = "'wght' 200, " should not set the property value
+Pass	e.style['font-variation-settings'] = "'wght' 200, " should not set the property value
 Pass	e.style['font-variation-settings'] = "'abcd\" 123" should not set the property value
 Pass	e.style['font-variation-settings'] = "'wght' 100px" should not set the property value
 Pass	e.style['font-variation-settings'] = "'wght' calc(100px + 200px)" should not set the property value
diff --git a/Tests/LibWeb/Text/expected/wpt-import/css/mediaqueries/match-media-parsing.txt b/Tests/LibWeb/Text/expected/wpt-import/css/mediaqueries/match-media-parsing.txt
index 066feea908f..03af42c3672 100644
--- a/Tests/LibWeb/Text/expected/wpt-import/css/mediaqueries/match-media-parsing.txt
+++ b/Tests/LibWeb/Text/expected/wpt-import/css/mediaqueries/match-media-parsing.txt
@@ -2,8 +2,8 @@ Harness status: OK
 
 Found 34 tests
 
-30 Pass
-4 Fail
+32 Pass
+2 Fail
 Pass	Test parsing '' with matchMedia
 Pass	Test parsing ' ' with matchMedia
 Pass	Test parsing 'all' with matchMedia
@@ -20,9 +20,9 @@ Pass	Test parsing 'color)' with matchMedia
 Pass	Test parsing '  color)' with matchMedia
 Pass	Test parsing '  color ), ( color' with matchMedia
 Fail	Test parsing ' foo ' with matchMedia
-Fail	Test parsing ',' with matchMedia
+Pass	Test parsing ',' with matchMedia
 Pass	Test parsing ' , ' with matchMedia
-Fail	Test parsing ',,' with matchMedia
+Pass	Test parsing ',,' with matchMedia
 Pass	Test parsing '  ,  ,  ' with matchMedia
 Fail	Test parsing ' foo,' with matchMedia
 Pass	Test parsing '(min-resolution: 1x)' with matchMedia