diff --git a/Libraries/LibWeb/CSS/Parser/PropertyParsing.cpp b/Libraries/LibWeb/CSS/Parser/PropertyParsing.cpp
index e72e741ef61..100d24d378b 100644
--- a/Libraries/LibWeb/CSS/Parser/PropertyParsing.cpp
+++ b/Libraries/LibWeb/CSS/Parser/PropertyParsing.cpp
@@ -2563,7 +2563,7 @@ RefPtr<CSSStyleValue> Parser::parse_font_feature_settings_value(TokenStream<Comp
         if (!opentype_tag || !value || tag_tokens.has_next_token())
             return nullptr;
 
-        feature_tags_map.set(opentype_tag->string_value(), OpenTypeTaggedStyleValue::create(opentype_tag->string_value(), value.release_nonnull()));
+        feature_tags_map.set(opentype_tag->string_value(), OpenTypeTaggedStyleValue::create(OpenTypeTaggedStyleValue::Mode::FontFeatureSettings, opentype_tag->string_value(), value.release_nonnull()));
     }
 
     // "The computed value contains the de-duplicated feature tags, sorted in ascending order by code unit."
@@ -2609,7 +2609,7 @@ RefPtr<CSSStyleValue> Parser::parse_font_variation_settings_value(TokenStream<Co
         if (!opentype_tag || !number || tag_tokens.has_next_token())
             return nullptr;
 
-        axis_tags_map.set(opentype_tag->string_value(), OpenTypeTaggedStyleValue::create(opentype_tag->string_value(), number.release_nonnull()));
+        axis_tags_map.set(opentype_tag->string_value(), OpenTypeTaggedStyleValue::create(OpenTypeTaggedStyleValue::Mode::FontVariationSettings, opentype_tag->string_value(), number.release_nonnull()));
     }
 
     // "The computed value contains the de-duplicated axis names, sorted in ascending order by code unit."
diff --git a/Libraries/LibWeb/CSS/StyleValues/OpenTypeTaggedStyleValue.cpp b/Libraries/LibWeb/CSS/StyleValues/OpenTypeTaggedStyleValue.cpp
index fe5cd107f9b..e91fc5c8565 100644
--- a/Libraries/LibWeb/CSS/StyleValues/OpenTypeTaggedStyleValue.cpp
+++ b/Libraries/LibWeb/CSS/StyleValues/OpenTypeTaggedStyleValue.cpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2024, Sam Atkins <sam@ladybird.org>
+ * Copyright (c) 2024-2025, Sam Atkins <sam@ladybird.org>
  *
  * SPDX-License-Identifier: BSD-2-Clause
  */
@@ -13,8 +13,18 @@ String OpenTypeTaggedStyleValue::to_string(SerializationMode mode) const
 {
     StringBuilder builder;
     serialize_a_string(builder, m_tag);
-    // FIXME: For font-feature-settings, a 1 value is implicit, so we shouldn't output it.
-    builder.appendff(" {}", m_value->to_string(mode));
+    switch (m_mode) {
+    case Mode::FontFeatureSettings: {
+        // For font-feature-settings, a 1 value is implicit, so we shouldn't output it.
+        auto value_string = m_value->to_string(mode);
+        if (value_string != "1"sv)
+            builder.appendff(" {}", value_string);
+        break;
+    }
+    case Mode::FontVariationSettings:
+        builder.appendff(" {}", m_value->to_string(mode));
+        break;
+    }
 
     return builder.to_string_without_validation();
 }
diff --git a/Libraries/LibWeb/CSS/StyleValues/OpenTypeTaggedStyleValue.h b/Libraries/LibWeb/CSS/StyleValues/OpenTypeTaggedStyleValue.h
index 28467db70ea..a328942c8f2 100644
--- a/Libraries/LibWeb/CSS/StyleValues/OpenTypeTaggedStyleValue.h
+++ b/Libraries/LibWeb/CSS/StyleValues/OpenTypeTaggedStyleValue.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2024, Sam Atkins <sam@ladybird.org>
+ * Copyright (c) 2024-2025, Sam Atkins <sam@ladybird.org>
  *
  * SPDX-License-Identifier: BSD-2-Clause
  */
@@ -16,9 +16,13 @@ namespace Web::CSS {
 // and the `<opentype-tag> <number>` construct for `font-variation-settings`.
 class OpenTypeTaggedStyleValue : public StyleValueWithDefaultOperators<OpenTypeTaggedStyleValue> {
 public:
-    static ValueComparingNonnullRefPtr<OpenTypeTaggedStyleValue> create(FlyString tag, ValueComparingNonnullRefPtr<CSSStyleValue> value)
+    enum class Mode {
+        FontFeatureSettings,
+        FontVariationSettings,
+    };
+    static ValueComparingNonnullRefPtr<OpenTypeTaggedStyleValue> create(Mode mode, FlyString tag, ValueComparingNonnullRefPtr<CSSStyleValue> value)
     {
-        return adopt_ref(*new (nothrow) OpenTypeTaggedStyleValue(move(tag), move(value)));
+        return adopt_ref(*new (nothrow) OpenTypeTaggedStyleValue(mode, move(tag), move(value)));
     }
     virtual ~OpenTypeTaggedStyleValue() override = default;
 
@@ -30,13 +34,15 @@ public:
     bool properties_equal(OpenTypeTaggedStyleValue const&) const;
 
 private:
-    explicit OpenTypeTaggedStyleValue(FlyString tag, ValueComparingNonnullRefPtr<CSSStyleValue> value)
+    explicit OpenTypeTaggedStyleValue(Mode mode, FlyString tag, ValueComparingNonnullRefPtr<CSSStyleValue> value)
         : StyleValueWithDefaultOperators(Type::OpenTypeTagged)
+        , m_mode(mode)
         , m_tag(move(tag))
         , m_value(move(value))
     {
     }
 
+    Mode m_mode;
     FlyString m_tag;
     ValueComparingNonnullRefPtr<CSSStyleValue> m_value;
 };
diff --git a/Tests/LibWeb/Text/expected/wpt-import/css/css-fonts/parsing/font-feature-settings-computed.txt b/Tests/LibWeb/Text/expected/wpt-import/css/css-fonts/parsing/font-feature-settings-computed.txt
index 5fbe156ec10..f18b5fba053 100644
--- a/Tests/LibWeb/Text/expected/wpt-import/css/css-fonts/parsing/font-feature-settings-computed.txt
+++ b/Tests/LibWeb/Text/expected/wpt-import/css/css-fonts/parsing/font-feature-settings-computed.txt
@@ -2,15 +2,15 @@ Harness status: OK
 
 Found 10 tests
 
-2 Pass
-8 Fail
+8 Pass
+2 Fail
 Pass	Property font-feature-settings value 'normal'
-Fail	Property font-feature-settings value '"dlig"'
-Fail	Property font-feature-settings value '"smcp"'
-Fail	Property font-feature-settings value '"c2sc"'
+Pass	Property font-feature-settings value '"dlig"'
+Pass	Property font-feature-settings value '"smcp"'
+Pass	Property font-feature-settings value '"c2sc"'
 Pass	Property font-feature-settings value '"liga" 0'
-Fail	Property font-feature-settings value '"tnum", "hist"'
-Fail	Property font-feature-settings value '"PKRN"'
-Fail	Property font-feature-settings value '"dlig", "smcp", "dlig" 0'
+Pass	Property font-feature-settings value '"tnum", "hist"'
+Pass	Property font-feature-settings value '"PKRN"'
+Pass	Property font-feature-settings value '"dlig", "smcp", "dlig" 0'
 Fail	Property font-feature-settings value '"liga" calc(10 + (sign(2cqw - 10px) * 5))'
 Fail	Property font-feature-settings value '"liga" calc(10 + (sign(2cqw - 10px) * 5)), "dlig" calc(20 + (sign(2cqw - 10px) * 5))'
\ No newline at end of file
diff --git a/Tests/LibWeb/Text/expected/wpt-import/css/css-fonts/parsing/font-feature-settings-valid.txt b/Tests/LibWeb/Text/expected/wpt-import/css/css-fonts/parsing/font-feature-settings-valid.txt
index 10d42418a70..df2dcc49e53 100644
--- a/Tests/LibWeb/Text/expected/wpt-import/css/css-fonts/parsing/font-feature-settings-valid.txt
+++ b/Tests/LibWeb/Text/expected/wpt-import/css/css-fonts/parsing/font-feature-settings-valid.txt
@@ -2,13 +2,13 @@ Harness status: OK
 
 Found 8 tests
 
-2 Pass
-6 Fail
+6 Pass
+2 Fail
 Pass	e.style['font-feature-settings'] = "normal" should set the property value
-Fail	e.style['font-feature-settings'] = "\"dlig\" 1" should set the property value
-Fail	e.style['font-feature-settings'] = "\"smcp\" on" should set the property value
-Fail	e.style['font-feature-settings'] = "'c2sc'" should set the property value
+Pass	e.style['font-feature-settings'] = "\"dlig\" 1" should set the property value
+Pass	e.style['font-feature-settings'] = "\"smcp\" on" should set the property value
+Pass	e.style['font-feature-settings'] = "'c2sc'" should set the property value
 Pass	e.style['font-feature-settings'] = "\"liga\" off" should set the property value
 Fail	e.style['font-feature-settings'] = "\"tnum\", 'hist'" should set the property value
-Fail	e.style['font-feature-settings'] = "\"PKRN\"" should set the property value
+Pass	e.style['font-feature-settings'] = "\"PKRN\"" should set the property value
 Fail	e.style['font-feature-settings'] = "\"dlig\" 1, \"smcp\" on, \"dlig\" 0" should set the property value
\ No newline at end of file