diff --git a/packages/happy-dom/src/nodes/html-button-element/HTMLButtonElement.ts b/packages/happy-dom/src/nodes/html-button-element/HTMLButtonElement.ts
index ce0c93b53..a0426fcc7 100644
--- a/packages/happy-dom/src/nodes/html-button-element/HTMLButtonElement.ts
+++ b/packages/happy-dom/src/nodes/html-button-element/HTMLButtonElement.ts
@@ -217,7 +217,7 @@ export default class HTMLButtonElement extends HTMLElement implements IHTMLButto
 			const form = <IHTMLFormElement>this[PropertySymbol.formNode];
 			switch (this.type) {
 				case 'submit':
-					form.requestSubmit();
+					form.requestSubmit(this);
 					break;
 				case 'reset':
 					form.reset();
diff --git a/packages/happy-dom/src/nodes/html-input-element/HTMLInputElement.ts b/packages/happy-dom/src/nodes/html-input-element/HTMLInputElement.ts
index d8dbc807a..9fb7cdb52 100644
--- a/packages/happy-dom/src/nodes/html-input-element/HTMLInputElement.ts
+++ b/packages/happy-dom/src/nodes/html-input-element/HTMLInputElement.ts
@@ -1301,7 +1301,7 @@ export default class HTMLInputElement extends HTMLElement implements IHTMLInputE
 				} else if (inputType === 'submit') {
 					const form = <IHTMLFormElement>this[PropertySymbol.formNode];
 					if (form) {
-						form.requestSubmit();
+						form.requestSubmit(this);
 					}
 				} else if (inputType === 'reset' && this[PropertySymbol.isConnected]) {
 					const form = <IHTMLFormElement>this[PropertySymbol.formNode];
diff --git a/packages/happy-dom/test/nodes/html-button-element/HTMLButtonElement.test.ts b/packages/happy-dom/test/nodes/html-button-element/HTMLButtonElement.test.ts
index 4aeef9956..c03655228 100644
--- a/packages/happy-dom/test/nodes/html-button-element/HTMLButtonElement.test.ts
+++ b/packages/happy-dom/test/nodes/html-button-element/HTMLButtonElement.test.ts
@@ -2,6 +2,7 @@ import Window from '../../../src/window/Window.js';
 import Document from '../../../src/nodes/document/Document.js';
 import IHTMLButtonElement from '../../../src/nodes/html-button-element/IHTMLButtonElement.js';
 import Event from '../../../src/event/Event.js';
+import SubmitEvent from '../../../src/event/events/SubmitEvent';
 import IHTMLElement from '../../../src/nodes/html-element/IHTMLElement.js';
 import IHTMLFormElement from '../../../src/nodes/html-form-element/IHTMLFormElement.js';
 import ValidityState from '../../../src/validity-state/ValidityState.js';
@@ -255,11 +256,16 @@ describe('HTMLButtonElement', () => {
 
 			document.body.appendChild(form);
 
-			form.addEventListener('submit', () => submitTriggeredCount++);
+			let submitter: IHTMLElement | null = null;
+			form.addEventListener('submit', (event) => {
+				submitTriggeredCount++;
+				submitter = (<SubmitEvent>event).submitter;
+			});
 
 			button.click();
 
 			expect(submitTriggeredCount).toBe(1);
+			expect(submitter).toBe(button);
 		});
 
 		it('Resets form if type is "reset" and is a "click" event.', () => {
diff --git a/packages/happy-dom/test/nodes/html-input-element/HTMLInputElement.test.ts b/packages/happy-dom/test/nodes/html-input-element/HTMLInputElement.test.ts
index 1c181aa39..977833147 100644
--- a/packages/happy-dom/test/nodes/html-input-element/HTMLInputElement.test.ts
+++ b/packages/happy-dom/test/nodes/html-input-element/HTMLInputElement.test.ts
@@ -10,6 +10,7 @@ import HTMLInputElementSelectionDirectionEnum from '../../../src/nodes/html-inpu
 import ValidityState from '../../../src/validity-state/ValidityState.js';
 import IHTMLFormElement from '../../../src/nodes/html-form-element/IHTMLFormElement.js';
 import DOMExceptionNameEnum from '../../../src/exception/DOMExceptionNameEnum.js';
+import SubmitEvent from '../../../src/event/events/SubmitEvent.js';
 import { beforeEach, describe, it, expect } from 'vitest';
 
 describe('HTMLInputElement', () => {
@@ -1206,11 +1207,16 @@ describe('HTMLInputElement', () => {
 
 			document.body.appendChild(form);
 
-			form.addEventListener('submit', () => submitTriggeredCount++);
+			let submitter: IHTMLInputElement | null = null;
+			form.addEventListener('submit', (event) => {
+				submitTriggeredCount++;
+				submitter = <IHTMLInputElement>(<SubmitEvent>event).submitter;
+			});
 
 			button.click();
 
 			expect(submitTriggeredCount).toBe(1);
+			expect(submitter).toBe(button);
 		});
 
 		it('Resets form if type is "reset" and is a "click" event.', () => {