diff --git a/components/script/dom/htmlvideoelement.rs b/components/script/dom/htmlvideoelement.rs
index 69a58d7a081..266b5514ce2 100644
--- a/components/script/dom/htmlvideoelement.rs
+++ b/components/script/dom/htmlvideoelement.rs
@@ -6,7 +6,6 @@ use crate::dom::attr::Attr;
 use crate::dom::bindings::cell::DomRefCell;
 use crate::dom::bindings::codegen::Bindings::HTMLVideoElementBinding;
 use crate::dom::bindings::codegen::Bindings::HTMLVideoElementBinding::HTMLVideoElementMethods;
-use crate::dom::bindings::codegen::Bindings::WindowBinding::WindowBinding::WindowMethods;
 use crate::dom::bindings::inheritance::Castable;
 use crate::dom::bindings::refcounted::Trusted;
 use crate::dom::bindings::reflector::DomObject;
@@ -112,13 +111,8 @@ impl HTMLVideoElement {
         }
 
         // Step 3.
-        let poster_url = match ServoUrl::parse(poster_url) {
+        let poster_url = match document_from_node(self).url().join(&poster_url) {
             Ok(url) => url,
-            Err(url::ParseError::RelativeUrlWithoutBase) => {
-                let window = window_from_node(self);
-                let url = window.Location().get_url();
-                url.join(&poster_url).unwrap()
-            },
             Err(_) => return,
         };
 
diff --git a/components/script/dom/location.rs b/components/script/dom/location.rs
index 0a142205f02..aab7213a8f1 100644
--- a/components/script/dom/location.rs
+++ b/components/script/dom/location.rs
@@ -37,7 +37,7 @@ impl Location {
         )
     }
 
-    pub fn get_url(&self) -> ServoUrl {
+    fn get_url(&self) -> ServoUrl {
         self.window.get_url()
     }
 
diff --git a/tests/wpt/mozilla/meta/MANIFEST.json b/tests/wpt/mozilla/meta/MANIFEST.json
index 89f4eb55931..d9eb3fbccb1 100644
--- a/tests/wpt/mozilla/meta/MANIFEST.json
+++ b/tests/wpt/mozilla/meta/MANIFEST.json
@@ -32838,7 +32838,7 @@
    "testharness"
   ], 
   "mozilla/video_poster_frame.html": [
-   "2f4af97720c40fbbde8d1cad660b1018d88367e5", 
+   "8b321ef5d82e0de6e16625ecd41190abc00bacb6",
    "reftest"
   ], 
   "mozilla/video_poster_frame_ref.html": [
diff --git a/tests/wpt/mozilla/tests/mozilla/video_poster_frame.html b/tests/wpt/mozilla/tests/mozilla/video_poster_frame.html
index 2f4af97720c..8b321ef5d82 100644
--- a/tests/wpt/mozilla/tests/mozilla/video_poster_frame.html
+++ b/tests/wpt/mozilla/tests/mozilla/video_poster_frame.html
@@ -13,7 +13,7 @@
         // Apart from removing the `reftest-wait` class we need to get
         // the `load` event to signal that it's ok to take the reftest
         // screenshot. Video loading delays the document `load` event,
-        // so we garantee that we get this event by setting an invaid
+        // so we garantee that we get this event by setting an invalid
         // src attribute to the video tag.
         document.documentElement.classList.remove("reftest-wait");
       });