5 files changed, 24 insertions, 26 deletions
diff --git a/components/script/dom/filereader.rs b/components/script/dom/filereader.rs
index e3d0e1fd513..fdbef3739c8 100644
--- a/components/script/dom/filereader.rs
+++ b/components/script/dom/filereader.rs
@@ -14,6 +14,7 @@ use js::jsval::{self, JSVal};
 use js::rust::HandleObject;
 use js::typedarray::{ArrayBuffer, CreateWith};
 use mime::{self, Mime};
+use script_bindings::num::Finite;
 use stylo_atoms::Atom;
 
 use crate::dom::bindings::cell::DomRefCell;
@@ -463,8 +464,8 @@ impl FileReader {
             EventBubbles::DoesNotBubble,
             EventCancelable::NotCancelable,
             total.is_some(),
-            loaded,
-            total.unwrap_or(0),
+            Finite::wrap(loaded as f64),
+            Finite::wrap(total.unwrap_or(0) as f64),
             can_gc,
         );
         progressevent.upcast::<Event>().fire(self.upcast(), can_gc);
diff --git a/components/script/dom/progressevent.rs b/components/script/dom/progressevent.rs
index e0a8ee2992f..5e70bcf1642 100644
--- a/components/script/dom/progressevent.rs
+++ b/components/script/dom/progressevent.rs
@@ -4,6 +4,7 @@
 
 use dom_struct::dom_struct;
 use js::rust::HandleObject;
+use script_bindings::num::Finite;
 use stylo_atoms::Atom;
 
 use crate::dom::bindings::codegen::Bindings::EventBinding::EventMethods;
@@ -22,12 +23,16 @@ use crate::script_runtime::CanGc;
 pub(crate) struct ProgressEvent {
     event: Event,
     length_computable: bool,
-    loaded: u64,
-    total: u64,
+    loaded: Finite<f64>,
+    total: Finite<f64>,
 }
 
 impl ProgressEvent {
-    fn new_inherited(length_computable: bool, loaded: u64, total: u64) -> ProgressEvent {
+    fn new_inherited(
+        length_computable: bool,
+        loaded: Finite<f64>,
+        total: Finite<f64>,
+    ) -> ProgressEvent {
         ProgressEvent {
             event: Event::new_inherited(),
             length_computable,
@@ -43,8 +48,8 @@ impl ProgressEvent {
         can_bubble: EventBubbles,
         cancelable: EventCancelable,
         length_computable: bool,
-        loaded: u64,
-        total: u64,
+        loaded: Finite<f64>,
+        total: Finite<f64>,
         can_gc: CanGc,
     ) -> DomRoot<ProgressEvent> {
         Self::new_with_proto(
@@ -68,8 +73,8 @@ impl ProgressEvent {
         can_bubble: EventBubbles,
         cancelable: EventCancelable,
         length_computable: bool,
-        loaded: u64,
-        total: u64,
+        loaded: Finite<f64>,
+        total: Finite<f64>,
         can_gc: CanGc,
     ) -> DomRoot<ProgressEvent> {
         let ev = reflect_dom_object_with_proto(
@@ -121,12 +126,12 @@ impl ProgressEventMethods<crate::DomTypeHolder> for ProgressEvent {
     }
 
     // https://xhr.spec.whatwg.org/#dom-progressevent-loaded
-    fn Loaded(&self) -> u64 {
+    fn Loaded(&self) -> Finite<f64> {
         self.loaded
     }
 
     // https://xhr.spec.whatwg.org/#dom-progressevent-total
-    fn Total(&self) -> u64 {
+    fn Total(&self) -> Finite<f64> {
         self.total
     }
 
diff --git a/components/script/dom/xmlhttprequest.rs b/components/script/dom/xmlhttprequest.rs
index 20e25415f98..3c74189d1b9 100644
--- a/components/script/dom/xmlhttprequest.rs
+++ b/components/script/dom/xmlhttprequest.rs
@@ -31,6 +31,7 @@ use net_traits::{
     FetchMetadata, FetchResponseListener, FilteredMetadata, NetworkError, ReferrerPolicy,
     ResourceFetchTiming, ResourceTimingType, trim_http_whitespace,
 };
+use script_bindings::num::Finite;
 use script_traits::DocumentActivity;
 use servo_url::ServoUrl;
 use stylo_atoms::Atom;
@@ -1235,8 +1236,8 @@ impl XMLHttpRequest {
             EventBubbles::DoesNotBubble,
             EventCancelable::NotCancelable,
             length_computable,
-            loaded,
-            total_length,
+            Finite::wrap(loaded as f64),
+            Finite::wrap(total_length as f64),
             can_gc,
         );
         let target = if upload {
diff --git a/components/script_bindings/webidls/ProgressEvent.webidl b/components/script_bindings/webidls/ProgressEvent.webidl
index 17d066ef187..e931a4b9066 100644
--- a/components/script_bindings/webidls/ProgressEvent.webidl
+++ b/components/script_bindings/webidls/ProgressEvent.webidl
@@ -16,12 +16,12 @@
 interface ProgressEvent : Event {
   [Throws] constructor(DOMString type, optional ProgressEventInit eventInitDict = {});
   readonly attribute boolean lengthComputable;
-  readonly attribute unsigned long long loaded;
-  readonly attribute unsigned long long total;
+  readonly attribute double loaded;
+  readonly attribute double total;
 };
 
 dictionary ProgressEventInit : EventInit {
   boolean lengthComputable = false;
-  unsigned long long loaded = 0;
-  unsigned long long total = 0;
+  double loaded = 0;
+  double total = 0;
 };
diff --git a/tests/wpt/meta/xhr/progressevent-constructor.html.ini b/tests/wpt/meta/xhr/progressevent-constructor.html.ini
deleted file mode 100644
index 766a8c4a205..00000000000
--- a/tests/wpt/meta/xhr/progressevent-constructor.html.ini
+++ /dev/null
@@ -1,9 +0,0 @@
-[progressevent-constructor.html]
-  [Decimal number test.]
-    expected: FAIL
-
-  [Mixed integer and decimal number test.]
-    expected: FAIL
-
-  [Negative number.]
-    expected: FAIL