diff --git a/Libraries/LibWeb/CSS/MediaQueryList.cpp b/Libraries/LibWeb/CSS/MediaQueryList.cpp
index 5236eae49f9..63d4ac0e2e0 100644
--- a/Libraries/LibWeb/CSS/MediaQueryList.cpp
+++ b/Libraries/LibWeb/CSS/MediaQueryList.cpp
@@ -54,6 +54,13 @@ bool MediaQueryList::matches() const
     if (m_media.is_empty())
         return true;
 
+    // NOTE: If our document is inside a frame, we need to update layout
+    //       since that may cause our frame (and thus viewport) to resize.
+    if (auto container_document = m_document->container_document()) {
+        container_document->update_layout();
+        const_cast<MediaQueryList*>(this)->evaluate();
+    }
+
     for (auto& media : m_media) {
         if (media->matches())
             return true;
diff --git a/Tests/LibWeb/Text/expected/wpt-import/css/mediaqueries/media-query-matches-in-iframe.txt b/Tests/LibWeb/Text/expected/wpt-import/css/mediaqueries/media-query-matches-in-iframe.txt
index d321602ae2e..40970705717 100644
--- a/Tests/LibWeb/Text/expected/wpt-import/css/mediaqueries/media-query-matches-in-iframe.txt
+++ b/Tests/LibWeb/Text/expected/wpt-import/css/mediaqueries/media-query-matches-in-iframe.txt
@@ -2,19 +2,20 @@ Harness status: OK
 
 Found 22 tests
 
-22 Fail
-Fail	matchMedia('(max-width: 150px)').matches should update immediately
-Fail	matchMedia('(width: 100px)').matches should update immediately
-Fail	matchMedia('(orientation: portrait)').matches should update immediately
-Fail	matchMedia('(aspect-ratio: 1/1)').matches should update immediately
-Fail	matchMedia('(max-aspect-ratio: 4/3)').matches should update immediately
-Fail	matchMedia('(height: 100px)').matches should update immediately
-Fail	matchMedia('(max-height: 150px)').matches should update immediately
-Fail	matchMedia('(min-aspect-ratio: 3/4)').matches should update immediately
-Fail	matchMedia('(min-height: 150px)').matches should update immediately
-Fail	matchMedia('(aspect-ratio: 1/2)').matches should update immediately
-Fail	matchMedia('(min-width: 150px)').matches should update immediately
-Fail	matchMedia('(min-aspect-ratio: 4/3)').matches should update immediately
+12 Pass
+10 Fail
+Pass	matchMedia('(max-width: 150px)').matches should update immediately
+Pass	matchMedia('(width: 100px)').matches should update immediately
+Pass	matchMedia('(orientation: portrait)').matches should update immediately
+Pass	matchMedia('(aspect-ratio: 1/1)').matches should update immediately
+Pass	matchMedia('(max-aspect-ratio: 4/3)').matches should update immediately
+Pass	matchMedia('(height: 100px)').matches should update immediately
+Pass	matchMedia('(max-height: 150px)').matches should update immediately
+Pass	matchMedia('(min-aspect-ratio: 3/4)').matches should update immediately
+Pass	matchMedia('(min-height: 150px)').matches should update immediately
+Pass	matchMedia('(aspect-ratio: 1/2)').matches should update immediately
+Pass	matchMedia('(min-width: 150px)').matches should update immediately
+Pass	matchMedia('(min-aspect-ratio: 4/3)').matches should update immediately
 Fail	matchMedia('(max-width: 150px)') should not receive a change event until update the rendering step of HTML5 event loop
 Fail	matchMedia('(width: 100px)') should not receive a change event until update the rendering step of HTML5 event loop
 Fail	matchMedia('(orientation: portrait)') should not receive a change event until update the rendering step of HTML5 event loop