diff --git a/dom/svg/DOMSVGNumber.cpp b/dom/svg/DOMSVGNumber.cpp
index 6b9528606ef0..e748ec9f5cf0 100644
--- a/dom/svg/DOMSVGNumber.cpp
+++ b/dom/svg/DOMSVGNumber.cpp
@@ -111,36 +111,6 @@ DOMSVGNumber::DOMSVGNumber(nsISupports* aParent)
 {
 }
 
-/* static */ already_AddRefed<DOMSVGNumber>
-DOMSVGNumber::Constructor(const dom::GlobalObject& aGlobal, ErrorResult& aRv)
-{
-  nsCOMPtr<nsPIDOMWindowInner> window =
-    do_QueryInterface(aGlobal.GetAsSupports());
-  if (!window) {
-    aRv.Throw(NS_ERROR_UNEXPECTED);
-    return nullptr;
-  }
-
-  RefPtr<DOMSVGNumber> number = new DOMSVGNumber(window);
-  return number.forget();
-}
-
-/* static */ already_AddRefed<DOMSVGNumber>
-DOMSVGNumber::Constructor(const dom::GlobalObject& aGlobal, float aValue,
-                          ErrorResult& aRv)
-{
-  nsCOMPtr<nsPIDOMWindowInner> window =
-    do_QueryInterface(aGlobal.GetAsSupports());
-  if (!window) {
-    aRv.Throw(NS_ERROR_UNEXPECTED);
-    return nullptr;
-  }
-
-  RefPtr<DOMSVGNumber> number = new DOMSVGNumber(window);
-  number->SetValue(aValue, aRv);
-  return number.forget();
-}
-
 float
 DOMSVGNumber::Value()
 {
diff --git a/dom/svg/DOMSVGNumber.h b/dom/svg/DOMSVGNumber.h
index 36bbc489c05a..e4c8223bff00 100644
--- a/dom/svg/DOMSVGNumber.h
+++ b/dom/svg/DOMSVGNumber.h
@@ -126,12 +126,6 @@ public:
 
   virtual JSObject* WrapObject(JSContext* aCx, JS::Handle<JSObject*> aGivenProto) override;
 
-  static already_AddRefed<DOMSVGNumber>
-  Constructor(const dom::GlobalObject& aGlobal, ErrorResult& aRv);
-
-  static already_AddRefed<DOMSVGNumber>
-  Constructor(const dom::GlobalObject& aGlobal, float aValue, ErrorResult& aRv);
-
   float Value();
 
   void SetValue(float aValue, ErrorResult& aRv);
diff --git a/dom/webidl/SVGNumber.webidl b/dom/webidl/SVGNumber.webidl
index 01011e6a6442..8e1bb58c1031 100644
--- a/dom/webidl/SVGNumber.webidl
+++ b/dom/webidl/SVGNumber.webidl
@@ -10,8 +10,6 @@
  * liability, trademark and document use rules apply.
  */
 
-[Constructor,
- Constructor(float value)]
 interface SVGNumber {
   [SetterThrows]
   attribute float value;
diff --git a/testing/web-platform/meta/svg/interfaces.html.ini b/testing/web-platform/meta/svg/interfaces.html.ini
index b834adc3826c..369cb378e6f9 100644
--- a/testing/web-platform/meta/svg/interfaces.html.ini
+++ b/testing/web-platform/meta/svg/interfaces.html.ini
@@ -5,9 +5,6 @@
   [SVGGeometryElement interface: operation isPointInStroke(DOMPoint)]
     expected: FAIL
 
-  [SVGNumber interface: existence and properties of interface object]
-    expected: FAIL
-
   [SVGSVGElement interface: operation getIntersectionList(DOMRectReadOnly,SVGElement)]
     expected: FAIL