diff --git a/components/script/dom/webidls/DOMMatrix.webidl b/components/script/dom/webidls/DOMMatrix.webidl
index d8306d315fb6..d1dd65e8a63b 100644
--- a/components/script/dom/webidls/DOMMatrix.webidl
+++ b/components/script/dom/webidls/DOMMatrix.webidl
@@ -11,10 +11,9 @@
  */
 
 [Constructor,
-// Constructor(DOMString transformList),
-Constructor(sequence<unrestricted double> numberSequence)
-// Exposed=(Window,Worker)
-]
+ // Constructor(DOMString transformList),
+ Constructor(sequence<unrestricted double> numberSequence),
+ Exposed=(Window,Worker)]
 interface DOMMatrix : DOMMatrixReadOnly {
 
     [NewObject, Throws] static DOMMatrix fromMatrix(optional DOMMatrixInit other);
diff --git a/components/script/dom/webidls/DOMMatrixReadOnly.webidl b/components/script/dom/webidls/DOMMatrixReadOnly.webidl
index 6d92a6b08289..9261002e3487 100644
--- a/components/script/dom/webidls/DOMMatrixReadOnly.webidl
+++ b/components/script/dom/webidls/DOMMatrixReadOnly.webidl
@@ -11,10 +11,9 @@
  */
 
 [Constructor,
-// Constructor(DOMString transformList)
-Constructor(sequence<unrestricted double> numberSequence),
-// Exposed=(Window,Worker)
-]
+ // Constructor(DOMString transformList)
+ Constructor(sequence<unrestricted double> numberSequence),
+ Exposed=(Window,Worker)]
 interface DOMMatrixReadOnly {
 
     [NewObject, Throws] static DOMMatrixReadOnly fromMatrix(optional DOMMatrixInit other);
diff --git a/tests/wpt/mozilla/tests/mozilla/interfaces.worker.js b/tests/wpt/mozilla/tests/mozilla/interfaces.worker.js
index 15c6e2d60c6f..eca4a7562b6f 100644
--- a/tests/wpt/mozilla/tests/mozilla/interfaces.worker.js
+++ b/tests/wpt/mozilla/tests/mozilla/interfaces.worker.js
@@ -11,6 +11,8 @@ test_interfaces([
   "Blob",
   "CloseEvent",
   "CSSStyleDeclaration",
+  "DOMMatrix",
+  "DOMMatrixReadOnly",
   "DOMPoint",
   "DOMPointReadOnly",
   "DOMQuad",