diff --git a/dom/animation/DocumentTimeline.cpp b/dom/animation/DocumentTimeline.cpp
index a1c3078ea5d9..ffc18e8f3e4a 100644
--- a/dom/animation/DocumentTimeline.cpp
+++ b/dom/animation/DocumentTimeline.cpp
@@ -46,7 +46,7 @@ DocumentTimeline::WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto)
 
 /* static */ already_AddRefed<DocumentTimeline>
 DocumentTimeline::Constructor(const GlobalObject& aGlobal,
-                              const DOMHighResTimeStamp& aOriginTime,
+                              const DocumentTimelineOptions& aOptions,
                               ErrorResult& aRv)
 {
   nsIDocument* doc = AnimationUtils::GetCurrentRealmDocument(aGlobal.Context());
@@ -54,12 +54,11 @@ DocumentTimeline::Constructor(const GlobalObject& aGlobal,
     aRv.Throw(NS_ERROR_FAILURE);
     return nullptr;
   }
+  TimeDuration originTime =
+    TimeDuration::FromMilliseconds(aOptions.mOriginTime);
 
-  TimeDuration originTime = TimeDuration::FromMilliseconds(aOriginTime);
   if (originTime == TimeDuration::Forever() ||
       originTime == -TimeDuration::Forever()) {
-    nsAutoString inputOriginTime;
-    inputOriginTime.AppendFloat(aOriginTime);
     aRv.ThrowTypeError<dom::MSG_TIME_VALUE_OUT_OF_RANGE>(
       NS_LITERAL_STRING("Origin time"));
     return nullptr;
diff --git a/dom/animation/DocumentTimeline.h b/dom/animation/DocumentTimeline.h
index a9e250f6d81d..b20f637f55e9 100644
--- a/dom/animation/DocumentTimeline.h
+++ b/dom/animation/DocumentTimeline.h
@@ -7,6 +7,7 @@
 #ifndef mozilla_dom_DocumentTimeline_h
 #define mozilla_dom_DocumentTimeline_h
 
+#include "mozilla/dom/DocumentTimelineBinding.h"
 #include "mozilla/TimeStamp.h"
 #include "AnimationTimeline.h"
 #include "nsIDocument.h"
@@ -54,7 +55,7 @@ public:
 
   static already_AddRefed<DocumentTimeline>
   Constructor(const GlobalObject& aGlobal,
-              const DOMHighResTimeStamp& aOriginTime,
+              const DocumentTimelineOptions& aOptions,
               ErrorResult& aRv);
 
   // AnimationTimeline methods
diff --git a/dom/animation/test/mozilla/file_document-timeline-origin-time-range.html b/dom/animation/test/mozilla/file_document-timeline-origin-time-range.html
index 7c8c3f7f3d66..083bf0903b61 100644
--- a/dom/animation/test/mozilla/file_document-timeline-origin-time-range.html
+++ b/dom/animation/test/mozilla/file_document-timeline-origin-time-range.html
@@ -12,13 +12,17 @@
 // inside the allowed range will just mean we overflow elsewhere.
 
 test(function(t) {
-  assert_throws({name: 'TypeError'},
-    function() { new DocumentTimeline(Number.MAX_SAFE_INTEGER); });
+  assert_throws({ name: 'TypeError'},
+    function() {
+      new DocumentTimeline({ originTime: Number.MAX_SAFE_INTEGER });
+    });
 }, 'Calculated current time is positive infinity');
 
 test(function(t) {
-  assert_throws({name: 'TypeError'},
-    function() { new DocumentTimeline(-1 * Number.MAX_SAFE_INTEGER); });
+  assert_throws({ name: 'TypeError'},
+    function() {
+      new DocumentTimeline({ originTime: -1 * Number.MAX_SAFE_INTEGER });
+    });
 }, 'Calculated current time is negative infinity');
 
 done();
diff --git a/dom/webidl/DocumentTimeline.webidl b/dom/webidl/DocumentTimeline.webidl
index ed30c53414a9..916b1a4911cc 100644
--- a/dom/webidl/DocumentTimeline.webidl
+++ b/dom/webidl/DocumentTimeline.webidl
@@ -10,7 +10,11 @@
  * liability, trademark and document use rules apply.
  */
 
+dictionary DocumentTimelineOptions {
+  DOMHighResTimeStamp originTime = 0;
+};
+
 [Func="nsDocument::IsWebAnimationsEnabled",
- Constructor (DOMHighResTimeStamp originTime)]
+ Constructor (optional DocumentTimelineOptions options)]
 interface DocumentTimeline : AnimationTimeline {
 };
diff --git a/testing/web-platform/meta/web-animations/interfaces/DocumentTimeline/constructor.html.ini b/testing/web-platform/meta/web-animations/interfaces/DocumentTimeline/constructor.html.ini
deleted file mode 100644
index 0bfee0d2aef9..000000000000
--- a/testing/web-platform/meta/web-animations/interfaces/DocumentTimeline/constructor.html.ini
+++ /dev/null
@@ -1,17 +0,0 @@
-[constructor.html]
-  type: testharness
-  [An origin time of zero is used when none is supplied]
-    expected: FAIL
-    bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1302038
-
-  [A zero origin time produces a document timeline with a current time identical to the default document timeline]
-    expected: FAIL
-    bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1302038
-
-  [A positive origin time makes the document timeline's current time lag behind the default document timeline]
-    expected: FAIL
-    bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1302038
-
-  [A negative origin time makes the document timeline's current time run ahead of the default document timeline]
-    expected: FAIL
-    bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1302038
diff --git a/testing/web-platform/tests/web-animations/interfaces/AnimationTimeline/idlharness.html b/testing/web-platform/tests/web-animations/interfaces/AnimationTimeline/idlharness.html
index 04afcada07af..29c891407729 100644
--- a/testing/web-platform/tests/web-animations/interfaces/AnimationTimeline/idlharness.html
+++ b/testing/web-platform/tests/web-animations/interfaces/AnimationTimeline/idlharness.html
@@ -12,7 +12,10 @@ interface AnimationTimeline {
 };
 </script>
 <script type="text/plain" id="DocumentTimeline-IDL">
-[Constructor (DOMHighResTimeStamp originTime)]
+dictionary DocumentTimelineOptions {
+  DOMHighResTimeStamp originTime = 0;
+};
+[Constructor (optional DocumentTimelineOptions options)]
 interface DocumentTimeline : AnimationTimeline {
 };
 </script>