diff --git a/Libraries/LibWeb/CSS/StyleValues/ShorthandStyleValue.cpp b/Libraries/LibWeb/CSS/StyleValues/ShorthandStyleValue.cpp
index ef3b1d37b8..2ae516cdfc 100644
--- a/Libraries/LibWeb/CSS/StyleValues/ShorthandStyleValue.cpp
+++ b/Libraries/LibWeb/CSS/StyleValues/ShorthandStyleValue.cpp
@@ -183,8 +183,14 @@ String ShorthandStyleValue::to_string() const
     }
     case PropertyID::ListStyle:
         return MUST(String::formatted("{} {} {}", longhand(PropertyID::ListStylePosition)->to_string(), longhand(PropertyID::ListStyleImage)->to_string(), longhand(PropertyID::ListStyleType)->to_string()));
-    case PropertyID::Overflow:
-        return MUST(String::formatted("{} {}", longhand(PropertyID::OverflowX)->to_string(), longhand(PropertyID::OverflowY)->to_string()));
+    case PropertyID::Overflow: {
+        auto overflow_x = longhand(PropertyID::OverflowX);
+        auto overflow_y = longhand(PropertyID::OverflowY);
+        if (overflow_x == overflow_y)
+            return overflow_x->to_string();
+
+        return MUST(String::formatted("{} {}", overflow_x->to_string(), overflow_y->to_string()));
+    }
     case PropertyID::PlaceContent: {
         auto align_content = longhand(PropertyID::AlignContent)->to_string();
         auto justify_content = longhand(PropertyID::JustifyContent)->to_string();
diff --git a/Tests/LibWeb/Text/expected/css/CSSStyleDeclaration-all-supported-properties-and-default-values.txt b/Tests/LibWeb/Text/expected/css/CSSStyleDeclaration-all-supported-properties-and-default-values.txt
index 37799f22d2..eec621fd3a 100644
--- a/Tests/LibWeb/Text/expected/css/CSSStyleDeclaration-all-supported-properties-and-default-values.txt
+++ b/Tests/LibWeb/Text/expected/css/CSSStyleDeclaration-all-supported-properties-and-default-values.txt
@@ -443,7 +443,7 @@ All supported properties and their default values exposed from CSSStyleDeclarati
 'outline-style': 'none'
 'outlineWidth': 'medium'
 'outline-width': 'medium'
-'overflow': 'visible visible'
+'overflow': 'visible'
 'overflowX': 'visible'
 'overflow-x': 'visible'
 'overflowY': 'visible'
diff --git a/Tests/LibWeb/Text/expected/wpt-import/css/cssom/overflow-serialization.txt b/Tests/LibWeb/Text/expected/wpt-import/css/cssom/overflow-serialization.txt
index 7d72c40716..a2cb0fed92 100644
--- a/Tests/LibWeb/Text/expected/wpt-import/css/cssom/overflow-serialization.txt
+++ b/Tests/LibWeb/Text/expected/wpt-import/css/cssom/overflow-serialization.txt
@@ -6,16 +6,16 @@ Rerun
 
 Found 10 tests
 
-2 Pass
-8 Fail
+7 Pass
+3 Fail
 Details
 Result	Test Name	MessagePass	Single value overflow with CSS-wide keyword should serialize correctly.	
-Fail	Single value overflow with non-CSS-wide keyword should serialize correctly.	
+Pass	Single value overflow with non-CSS-wide keyword should serialize correctly.	
 Fail	Overflow-x/y longhands with same CSS-wide keyword should serialize correctly.	
 Fail	Overflow-x/y longhands with same non-CSS-wide keyword should serialize correctly.	
 Fail	Overflow-x/y longhands with different keywords should serialize correctly.	
-Fail	Single value overflow on element with CSS-wide keyword should serialize correctly.	
-Fail	Single value overflow on element with non-CSS-wide keyword should serialize correctly.	
-Fail	Overflow-x/y longhands on element with same CSS-wide keyword should serialize correctly.	
-Fail	Overflow-x/y longhands on element with same non-CSS-wide keyword should serialize correctly.	
+Pass	Single value overflow on element with CSS-wide keyword should serialize correctly.	
+Pass	Single value overflow on element with non-CSS-wide keyword should serialize correctly.	
+Pass	Overflow-x/y longhands on element with same CSS-wide keyword should serialize correctly.	
+Pass	Overflow-x/y longhands on element with same non-CSS-wide keyword should serialize correctly.	
 Pass	Overflow-x/y longhands on element with different keywords should serialize correctly.	
\ No newline at end of file
diff --git a/Tests/LibWeb/Text/expected/wpt-import/css/cssom/serialize-values.txt b/Tests/LibWeb/Text/expected/wpt-import/css/cssom/serialize-values.txt
index b6b0840e7c..9ada2785f5 100644
--- a/Tests/LibWeb/Text/expected/wpt-import/css/cssom/serialize-values.txt
+++ b/Tests/LibWeb/Text/expected/wpt-import/css/cssom/serialize-values.txt
@@ -6,8 +6,8 @@ Rerun
 
 Found 687 tests
 
-466 Pass
-221 Fail
+471 Pass
+216 Fail
 Details
 Result	Test Name	MessagePass	background-attachment: scroll	
 Pass	background-attachment: fixed	
@@ -561,11 +561,11 @@ Pass	outline-width: 0px
 Pass	outline-width: 1px	
 Pass	outline-width: .1em	
 Pass	outline-width: inherit	
-Fail	overflow: visible	
-Fail	overflow: hidden	
-Fail	overflow: scroll	
-Fail	overflow: auto	
-Fail	overflow: inherit	
+Pass	overflow: visible	
+Pass	overflow: hidden	
+Pass	overflow: scroll	
+Pass	overflow: auto	
+Pass	overflow: inherit	
 Pass	padding-top: 0px	
 Pass	padding-top: 1px	
 Pass	padding-top: .1em