diff --git a/dom/webidl/CloseEvent.webidl b/dom/webidl/CloseEvent.webidl
index 946fdbebda40..4fddbd8342b9 100644
--- a/dom/webidl/CloseEvent.webidl
+++ b/dom/webidl/CloseEvent.webidl
@@ -10,7 +10,8 @@
  * http://www.whatwg.org/specs/web-apps/current-work/multipage/network.html#closeevent
  */
 
-[Constructor(DOMString type, optional CloseEventInit eventInitDict),LegacyEventInit]
+[Constructor(DOMString type, optional CloseEventInit eventInitDict),LegacyEventInit,
+ Exposed=(Window,Worker)]
 interface CloseEvent : Event
 {
   readonly attribute boolean wasClean;
diff --git a/dom/webidl/ErrorEvent.webidl b/dom/webidl/ErrorEvent.webidl
index 5d12b879f2a8..cb858dffdbe6 100644
--- a/dom/webidl/ErrorEvent.webidl
+++ b/dom/webidl/ErrorEvent.webidl
@@ -4,7 +4,7 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 
 [Constructor(DOMString type, optional ErrorEventInit eventInitDict),
- Exposed=(Window,System)]
+ Exposed=(Window,Worker,System)]
 interface ErrorEvent : Event
 {
   readonly attribute DOMString message;
diff --git a/dom/webidl/FileList.webidl b/dom/webidl/FileList.webidl
index 84a56be1bf90..5e4590347b47 100644
--- a/dom/webidl/FileList.webidl
+++ b/dom/webidl/FileList.webidl
@@ -10,6 +10,7 @@
  * liability, trademark and document use rules apply.
  */
 
+[Exposed=(Window,Worker)]
 interface FileList {
   getter File? item(unsigned long index);
   readonly attribute unsigned long length;
diff --git a/dom/webidl/ProgressEvent.webidl b/dom/webidl/ProgressEvent.webidl
index 1be356b8f4d4..c2ecf579379e 100644
--- a/dom/webidl/ProgressEvent.webidl
+++ b/dom/webidl/ProgressEvent.webidl
@@ -4,7 +4,8 @@
  * You can obtain one at http://mozilla.org/MPL/2.0/.
  */
 
-[Constructor(DOMString type, optional ProgressEventInit eventInitDict)]
+[Constructor(DOMString type, optional ProgressEventInit eventInitDict),
+ Exposed=(Window,Worker)]
 interface ProgressEvent : Event
 {
   readonly attribute boolean lengthComputable;
diff --git a/dom/workers/test/serviceworkers/test_serviceworker_interfaces.js b/dom/workers/test/serviceworkers/test_serviceworker_interfaces.js
index 1e0250ed5bd2..42b18e83c8bb 100644
--- a/dom/workers/test/serviceworkers/test_serviceworker_interfaces.js
+++ b/dom/workers/test/serviceworkers/test_serviceworker_interfaces.js
@@ -88,6 +88,8 @@ var interfaceNamesInGlobalScope =
     "Client",
 // IMPORTANT: Do not change this list without review from a DOM peer!
     "Clients",
+// IMPORTANT: Do not change this list without review from a DOM peer!
+    "CloseEvent",
 // IMPORTANT: Do not change this list without review from a DOM peer!
     "Crypto",
 // IMPORTANT: Do not change this list without review from a DOM peer!
@@ -104,6 +106,8 @@ var interfaceNamesInGlobalScope =
     "DOMRequest",
 // IMPORTANT: Do not change this list without review from a DOM peer!
     "DOMStringList",
+// IMPORTANT: Do not change this list without review from a DOM peer!
+    "ErrorEvent",
 // IMPORTANT: Do not change this list without review from a DOM peer!
     "Event",
 // IMPORTANT: Do not change this list without review from a DOM peer!
@@ -116,6 +120,8 @@ var interfaceNamesInGlobalScope =
     "FetchEvent",
 // IMPORTANT: Do not change this list without review from a DOM peer!
     "File",
+// IMPORTANT: Do not change this list without review from a DOM peer!
+    "FileList",
 // IMPORTANT: Do not change this list without review from a DOM peer!
     "FileReader",
 // IMPORTANT: Do not change this list without review from a DOM peer!
@@ -176,6 +182,8 @@ var interfaceNamesInGlobalScope =
     { name: "PerformanceObserver", nightly: true },
 // IMPORTANT: Do not change this list without review from a DOM peer!
     { name: "PerformanceObserverEntryList", nightly: true },
+// IMPORTANT: Do not change this list without review from a DOM peer!
+    "ProgressEvent",
 // IMPORTANT: Do not change this list without review from a DOM peer!
     "PushEvent",
 // IMPORTANT: Do not change this list without review from a DOM peer!
diff --git a/dom/workers/test/test_worker_interfaces.js b/dom/workers/test/test_worker_interfaces.js
index 7231ad19b443..b089b5f7155b 100644
--- a/dom/workers/test/test_worker_interfaces.js
+++ b/dom/workers/test/test_worker_interfaces.js
@@ -84,6 +84,8 @@ var interfaceNamesInGlobalScope =
     "Cache",
 // IMPORTANT: Do not change this list without review from a DOM peer!
     "CacheStorage",
+// IMPORTANT: Do not change this list without review from a DOM peer!
+    "CloseEvent",
 // IMPORTANT: Do not change this list without review from a DOM peer!
     "Crypto",
 // IMPORTANT: Do not change this list without review from a DOM peer!
@@ -102,6 +104,8 @@ var interfaceNamesInGlobalScope =
     "DOMRequest",
 // IMPORTANT: Do not change this list without review from a DOM peer!
     "DOMStringList",
+// IMPORTANT: Do not change this list without review from a DOM peer!
+    "ErrorEvent",
 // IMPORTANT: Do not change this list without review from a DOM peer!
     "Event",
 // IMPORTANT: Do not change this list without review from a DOM peer!
@@ -110,6 +114,8 @@ var interfaceNamesInGlobalScope =
     "EventTarget",
 // IMPORTANT: Do not change this list without review from a DOM peer!
     "File",
+// IMPORTANT: Do not change this list without review from a DOM peer!
+    "FileList",
 // IMPORTANT: Do not change this list without review from a DOM peer!
     "FileReader",
 // IMPORTANT: Do not change this list without review from a DOM peer!
@@ -170,6 +176,8 @@ var interfaceNamesInGlobalScope =
     { name: "PerformanceObserver", nightly: true },
 // IMPORTANT: Do not change this list without review from a DOM peer!
     { name: "PerformanceObserverEntryList", nightly: true },
+// IMPORTANT: Do not change this list without review from a DOM peer!
+    "ProgressEvent",
 // IMPORTANT: Do not change this list without review from a DOM peer!
     "PushManager",
 // IMPORTANT: Do not change this list without review from a DOM peer!
diff --git a/testing/web-platform/meta/FileAPI/idlharness.worker.js.ini b/testing/web-platform/meta/FileAPI/idlharness.worker.js.ini
index 82fd5e0ffb8d..7454ddb20757 100644
--- a/testing/web-platform/meta/FileAPI/idlharness.worker.js.ini
+++ b/testing/web-platform/meta/FileAPI/idlharness.worker.js.ini
@@ -21,24 +21,6 @@
   [Blob interface: new File(["myFileBits"\], "myFileName") must inherit property "close" with the proper type (4)]
     expected: FAIL
 
-  [FileList interface object length]
-    expected: FAIL
-
-  [FileList interface: existence and properties of interface prototype object]
-    expected: FAIL
-
-  [FileList interface: existence and properties of interface prototype object's "constructor" property]
-    expected: FAIL
-
-  [FileList interface: operation item(unsigned long)]
-    expected: FAIL
-
-  [FileList interface: attribute length]
-    expected: FAIL
-
-  [FileList interface object name]
-    expected: FAIL
-
   [ArrayBuffer interface: existence and properties of interface object]
     expected: FAIL
 
@@ -51,9 +33,6 @@
   [Event interface: existence and properties of interface object]
     expected: FAIL
 
-  [FileList interface: existence and properties of interface object]
-    expected: FAIL
-
 
 [idlharness.worker.html]
   type: testharness
@@ -86,25 +65,3 @@
 
   [Blob interface: new File(["myFileBits"\], "myFileName") must inherit property "close" with the proper type (4)]
     expected: FAIL
-
-  [FileList interface: existence and properties of interface object]
-    expected: FAIL
-
-  [FileList interface object length]
-    expected: FAIL
-
-  [FileList interface object name]
-    expected: FAIL
-
-  [FileList interface: existence and properties of interface prototype object]
-    expected: FAIL
-
-  [FileList interface: existence and properties of interface prototype object's "constructor" property]
-    expected: FAIL
-
-  [FileList interface: operation item(unsigned long)]
-    expected: FAIL
-
-  [FileList interface: attribute length]
-    expected: FAIL
-
diff --git a/testing/web-platform/meta/workers/semantics/interface-objects/001.worker.js.ini b/testing/web-platform/meta/workers/semantics/interface-objects/001.worker.js.ini
index 93486faeb0e8..93bb72f6fe4d 100644
--- a/testing/web-platform/meta/workers/semantics/interface-objects/001.worker.js.ini
+++ b/testing/web-platform/meta/workers/semantics/interface-objects/001.worker.js.ini
@@ -1,17 +1,9 @@
 [001.worker]
   type: testharness
-  [The ErrorEvent interface object should be exposed.]
-    expected: FAIL
 
   [The SharedWorker interface object should be exposed.]
     expected: FAIL
 
-  [The FileList interface object should be exposed.]
-    expected: FAIL
-
-  [The ProgressEvent interface object should be exposed.]
-    expected: FAIL
-
   [The CanvasProxy interface object should be exposed.]
     expected: FAIL
 
@@ -42,9 +34,6 @@
   [The PromiseRejectionEvent interface object should be exposed.]
     expected: FAIL
 
-  [The CloseEvent interface object should be exposed.]
-    expected: FAIL
-
   [The ReadableStream interface object should be exposed.]
     expected: FAIL
 
@@ -72,18 +61,6 @@
   [The PromiseRejectionEvent interface object should be exposed.]
     expected: FAIL
 
-  [The CloseEvent interface object should be exposed.]
-    expected: FAIL
-
-  [The ProgressEvent interface object should be exposed.]
-    expected: FAIL
-
-  [The FileList interface object should be exposed.]
-    expected: FAIL
-
-  [The ErrorEvent interface object should be exposed.]
-    expected: FAIL
-
   [The ReadableStream interface object should be exposed.]
     expected: FAIL
 
diff --git a/testing/web-platform/meta/workers/semantics/interface-objects/003.html.ini b/testing/web-platform/meta/workers/semantics/interface-objects/003.html.ini
index b7ad31234ec4..63b4b942b397 100644
--- a/testing/web-platform/meta/workers/semantics/interface-objects/003.html.ini
+++ b/testing/web-platform/meta/workers/semantics/interface-objects/003.html.ini
@@ -18,18 +18,6 @@
   [The PromiseRejectionEvent interface object should be exposed]
     expected: FAIL
 
-  [The CloseEvent interface object should be exposed]
-    expected: FAIL
-
-  [The ProgressEvent interface object should be exposed]
-    expected: FAIL
-
-  [The FileList interface object should be exposed]
-    expected: FAIL
-
-  [The ErrorEvent interface object should be exposed]
-    expected: FAIL
-
   [The ReadableStream interface object should be exposed]
     expected: FAIL