diff --git a/Libraries/LibWeb/CSS/StyleValues/RectStyleValue.cpp b/Libraries/LibWeb/CSS/StyleValues/RectStyleValue.cpp
index 02e96ce127a..09cfb3ac6d6 100644
--- a/Libraries/LibWeb/CSS/StyleValues/RectStyleValue.cpp
+++ b/Libraries/LibWeb/CSS/StyleValues/RectStyleValue.cpp
@@ -18,7 +18,7 @@ ValueComparingNonnullRefPtr<RectStyleValue> RectStyleValue::create(EdgeRect rect
 
 String RectStyleValue::to_string() const
 {
-    return MUST(String::formatted("rect({} {} {} {})", m_rect.top_edge, m_rect.right_edge, m_rect.bottom_edge, m_rect.left_edge));
+    return MUST(String::formatted("rect({}, {}, {}, {})", m_rect.top_edge, m_rect.right_edge, m_rect.bottom_edge, m_rect.left_edge));
 }
 
 }
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 687f8e009ab..e44c2e46ff2 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
 
-462 Pass
-225 Fail
+463 Pass
+224 Fail
 Details
 Result	Test Name	MessagePass	background-attachment: scroll	
 Pass	background-attachment: fixed	
@@ -315,7 +315,7 @@ Pass	clear: left
 Pass	clear: right	
 Pass	clear: both	
 Pass	clear: inherit	
-Fail	clip: rect(1em, auto, 0.5px, 2000em)	
+Pass	clip: rect(1em, auto, 0.5px, 2000em)	
 Pass	clip: auto	
 Pass	clip: inherit	
 Pass	color: black