emberjs
diff --git a/‎packages/@ember/object/core.ts‎
Lines changed: 1 addition & 1 deletion b/‎packages/@ember/object/core.ts‎
Lines changed: 1 addition & 1 deletion
diff --git a/‎type-tests/@ember/component-test/component.ts‎
Lines changed: 6 additions & 4 deletions b/‎type-tests/@ember/component-test/component.ts‎
Lines changed: 6 additions & 4 deletions
diff --git a/‎type-tests/ember/core-object.ts‎
Lines changed: 7 additions & 0 deletions b/‎type-tests/ember/core-object.ts‎
Lines changed: 7 additions & 0 deletions
@@ -346,7 +346,7 @@ class CoreObject {
     @method init
     @public
   */
-  init(_properties: object | undefined) {}
+  init(_properties?: object) {}
 
   /**
     Defines the properties that will be concatenated from the superclass
 
@@ -17,12 +17,14 @@ const component1 = Component.extend({
   },
 });
 
-class AnotherComponent extends Component {
-  name = '';
-
-  init() {
+class ClassicComponent extends Component {
+  override init(): void {
     super.init();
   }
+}
+
+class AnotherComponent extends Component {
+  name = '';
 
   hello(name: string) {
     this.set('name', name);
 
@@ -9,6 +9,13 @@ expectTypeOf(co1.isDestroying).toBeBoolean();
 expectTypeOf(co1.destroy()).toEqualTypeOf<CoreObject>();
 expectTypeOf(co1.toString()).toBeString();
 
+/** Subclasses may override init and call super.init() without arguments. */
+class CoreObjectWithInit extends CoreObject {
+  override init(): void {
+    super.init();
+  }
+}
+
 /** .create tests */
 const co2 = CoreObject.create();
 expectTypeOf(co2.isDestroyed).toBeBoolean();