diff --git a/.changeset/famous-cows-hug.md b/.changeset/famous-cows-hug.md
new file mode 100644
index 0000000000..3ebfa271e2
--- /dev/null
+++ b/.changeset/famous-cows-hug.md
@@ -0,0 +1,5 @@
+---
+'@adyen/adyen-web': patch
+---
+
+Fix accessibility issue with opening klarna widget with enter button
diff --git a/packages/lib/src/components/Donation/components/FixedAmounts.tsx b/packages/lib/src/components/Donation/components/FixedAmounts.tsx
index ae86fc757f..1c3e44ec2f 100644
--- a/packages/lib/src/components/Donation/components/FixedAmounts.tsx
+++ b/packages/lib/src/components/Donation/components/FixedAmounts.tsx
@@ -11,7 +11,7 @@ interface FixedAmountsProps {
     values: Array<number>;
     status: Status;
     onAmountSelected: ({ target }) => void;
-    onDonateButtonClicked: (amount: number) => void;
+    onDonateButtonClicked: () => void;
 }
 export default function FixedAmounts(props: FixedAmountsProps) {
     const { currency, values, selectedAmount, status, onAmountSelected, onDonateButtonClicked } = props;
diff --git a/packages/lib/src/components/Klarna/KlarnaPayments.tsx b/packages/lib/src/components/Klarna/KlarnaPayments.tsx
index b8ddfbc495..4f05a5895a 100644
--- a/packages/lib/src/components/Klarna/KlarnaPayments.tsx
+++ b/packages/lib/src/components/Klarna/KlarnaPayments.tsx
@@ -6,6 +6,7 @@ import { KlarnaContainer } from './components/KlarnaContainer/KlarnaContainer';
 import { TxVariants } from '../tx-variants';
 import type { KlarnaAction, KlarnaAdditionalDetailsData, KlarnaComponentRef, KlarnaConfiguration } from './types';
 import type { ICore } from '../../core/types';
+import { PayButtonFunctionProps } from '../internal/UIElement/types';
 
 class KlarnaPayments extends UIElement<KlarnaConfiguration> {
     public static type = TxVariants.klarna;
@@ -38,7 +39,7 @@ class KlarnaPayments extends UIElement<KlarnaConfiguration> {
         };
     }
 
-    public payButton = props => {
+    public payButton = (props: PayButtonFunctionProps) => {
         return <PayButton amount={this.props.amount} onClick={this.submit} {...props} />;
     };
 
diff --git a/packages/lib/src/components/Klarna/components/KlarnaWidget/KlarnaWidget.test.tsx b/packages/lib/src/components/Klarna/components/KlarnaWidget/KlarnaWidget.test.tsx
index b6fb7b04b8..ad269aff59 100644
--- a/packages/lib/src/components/Klarna/components/KlarnaWidget/KlarnaWidget.test.tsx
+++ b/packages/lib/src/components/Klarna/components/KlarnaWidget/KlarnaWidget.test.tsx
@@ -1,5 +1,6 @@
 import { h } from 'preact';
-import { fireEvent, render, screen } from '@testing-library/preact';
+import { render, screen } from '@testing-library/preact';
+import userEvent from '@testing-library/user-event';
 import { KlarnaWidget } from './KlarnaWidget';
 import Script from '../../../../utils/Script';
 import { KLARNA_WIDGET_URL } from '../../constants';
@@ -7,6 +8,7 @@ import { KlarnaWidgetAuthorizeResponse, type KlarnaWidgetProps } from '../../typ
 import { CoreProvider } from '../../../../core/Context/CoreProvider';
 import { mock } from 'jest-mock-extended';
 import { AnalyticsModule } from '../../../../types/global-types';
+import { PayButtonFunctionProps } from '../../../internal/UIElement/types';
 
 jest.mock('../../../../utils/Script', () => {
     return jest.fn().mockImplementation(() => {
@@ -42,7 +44,7 @@ describe('KlarnaWidget', () => {
     const paymentData = 'test';
     const paymentMethodType = 'klarna';
     const sdkData = { client_token: '123', payment_method_category: 'paynow' };
-    const payButton = props => (
+    const payButton = (props: PayButtonFunctionProps) => (
         <button data-testid="pay-with-klarna" {...props}>
             Pay with Klarna
         </button>
@@ -115,11 +117,12 @@ describe('KlarnaWidget', () => {
 
     describe('Pay with Klarna widget', () => {
         test('should call the onComplete if the payment is authorized', async () => {
+            const user = userEvent.setup();
             const authRes = { approved: true, show_form: true, authorization_token: 'abc' };
             klarnaObj.Payments.load = getKlarnaActionImp({ show_form: true });
             klarnaObj.Payments.authorize = getKlarnaActionImp(authRes);
             customRender(props);
-            fireEvent.click(await screen.findByTestId(/pay-with-klarna/i));
+            await user.click(await screen.findByTestId(/pay-with-klarna/i));
             expect(onComplete).toHaveBeenCalledWith({
                 data: {
                     paymentData,
@@ -129,20 +132,65 @@ describe('KlarnaWidget', () => {
                 }
             });
         });
+
+        test('should call the onComplete if the payment is authorized after pay button is triggered with {Enter} key', async () => {
+            const user = userEvent.setup();
+            const authRes = { approved: true, show_form: true, authorization_token: 'abc' };
+            klarnaObj.Payments.load = getKlarnaActionImp({ show_form: true });
+            klarnaObj.Payments.authorize = getKlarnaActionImp(authRes);
+            customRender(props);
+
+            const payButton = await screen.findByTestId(/pay-with-klarna/i);
+            payButton.focus();
+            await user.keyboard('{Enter}');
+
+            expect(onComplete).toHaveBeenCalledWith({
+                data: {
+                    paymentData,
+                    details: {
+                        authorization_token: authRes.authorization_token
+                    }
+                }
+            });
+        });
+
+        test('should call the onComplete if the payment is authorized after pay button is triggered with {Space} key', async () => {
+            const user = userEvent.setup();
+            const authRes = { approved: true, show_form: true, authorization_token: 'abc' };
+            klarnaObj.Payments.load = getKlarnaActionImp({ show_form: true });
+            klarnaObj.Payments.authorize = getKlarnaActionImp(authRes);
+            customRender(props);
+
+            const payButton = await screen.findByTestId(/pay-with-klarna/i);
+            payButton.focus();
+            await user.keyboard('{Space}');
+
+            expect(onComplete).toHaveBeenCalledWith({
+                data: {
+                    paymentData,
+                    details: {
+                        authorization_token: authRes.authorization_token
+                    }
+                }
+            });
+        });
+
         test('should call the onError if the payment is not authorized temporarily', async () => {
+            const user = userEvent.setup();
             klarnaObj.Payments.load = getKlarnaActionImp({ show_form: true });
             const authRes = { approved: false, show_form: true };
             klarnaObj.Payments.authorize = getKlarnaActionImp(authRes);
             customRender(props);
-            fireEvent.click(await screen.findByTestId(/pay-with-klarna/i));
+            await user.click(await screen.findByTestId(/pay-with-klarna/i));
             expect(onError).toHaveBeenCalledWith(authRes);
         });
 
         test('should call the onComplete if the payment is not authorized permanently', async () => {
+            const user = userEvent.setup();
             klarnaObj.Payments.load = getKlarnaActionImp({ show_form: true });
             klarnaObj.Payments.authorize = getKlarnaActionImp({ show_form: false });
             customRender(props);
-            fireEvent.click(await screen.findByTestId(/pay-with-klarna/i));
+            await user.click(await screen.findByTestId(/pay-with-klarna/i));
             expect(onComplete).toHaveBeenCalledWith({
                 data: {
                     paymentData,
diff --git a/packages/lib/src/components/Klarna/components/KlarnaWidget/KlarnaWidget.tsx b/packages/lib/src/components/Klarna/components/KlarnaWidget/KlarnaWidget.tsx
index 2642a0e675..4f5919326c 100644
--- a/packages/lib/src/components/Klarna/components/KlarnaWidget/KlarnaWidget.tsx
+++ b/packages/lib/src/components/Klarna/components/KlarnaWidget/KlarnaWidget.tsx
@@ -32,7 +32,7 @@ export function KlarnaWidget({ sdkData, paymentMethodType, widgetInitializationT
                 container: klarnaWidgetRef.current,
                 payment_method_category: sdkData.payment_method_category
             },
-            function (res) {
+            function (res: { show_form: boolean; error: unknown }) {
                 // If show_form: true is received together with an error, something fixable is wrong and the consumer
                 // needs to take action before moving forward
                 // If show_form: false, the payment method in the loaded widget will not be offered for this order
@@ -81,6 +81,19 @@ export function KlarnaWidget({ sdkData, paymentMethodType, widgetInitializationT
         }
     }, [sdkData.payment_method_category, props.onComplete, props.onError]);
 
+    /**
+     * TODO: Clean this up when we have a different solution for handling on click in the BaseElement class
+     * We need this specifically for handling ENTER keypresses from the keyboard
+     * because the UIElement class has an on keypress handler which can trigger a components submit function
+     * ENTER key press on this button should not trigger this behaviour since the Klarna script has already been loaded
+     */
+    const handleKeyDown = (e: h.JSX.TargetedKeyboardEvent<HTMLButtonElement>) => {
+        if (e.key === 'Enter' || e.code === 'Enter') {
+            e.preventDefault();
+            authorizeKlarna();
+        }
+    };
+
     /**
      * Initializes Klarna SDK if it is already available and reinitialize
      * it when the init time refreshes
@@ -113,7 +126,12 @@ export function KlarnaWidget({ sdkData, paymentMethodType, widgetInitializationT
         return (
             <div className="adyen-checkout__klarna-widget">
                 <div ref={klarnaWidgetRef} />
-                {payButton({ status, disabled: status === 'loading', onClick: authorizeKlarna })}
+                {payButton({
+                    status,
+                    disabled: status === 'loading',
+                    onClick: authorizeKlarna,
+                    onKeyDown: handleKeyDown
+                })}
             </div>
         );
     }
diff --git a/packages/lib/src/components/internal/Button/Button.test.tsx b/packages/lib/src/components/internal/Button/Button.test.tsx
index 252697ecad..0a35ff836b 100644
--- a/packages/lib/src/components/internal/Button/Button.test.tsx
+++ b/packages/lib/src/components/internal/Button/Button.test.tsx
@@ -2,8 +2,9 @@ import { h } from 'preact';
 import { mount } from 'enzyme';
 import Button from './Button';
 import { CoreProvider } from '../../../core/Context/CoreProvider';
+import { ButtonProps } from './types';
 
-const getWrapper = props => {
+const getWrapper = (props: ButtonProps) => {
     return mount(
         <CoreProvider i18n={global.i18n} loadingContext="test" resources={global.resources}>
             <Button {...props} />
@@ -58,17 +59,17 @@ describe('Button', () => {
     });
 
     test('Renders secondary button', () => {
-        const wrapper = getWrapper({ variant: 'secondary ' });
+        const wrapper = getWrapper({ variant: 'secondary' });
         expect(wrapper.find('.adyen-checkout__button--secondary').length).toBe(1);
     });
 
     test('Renders action button', () => {
-        const wrapper = getWrapper({ variant: 'action ' });
+        const wrapper = getWrapper({ variant: 'action' });
         expect(wrapper.find('.adyen-checkout__button--action').length).toBe(1);
     });
 
     test('Renders ghost button', () => {
-        const wrapper = getWrapper({ variant: 'ghost ' });
+        const wrapper = getWrapper({ variant: 'ghost' });
         expect(wrapper.find('.adyen-checkout__button--ghost').length).toBe(1);
     });
 });
diff --git a/packages/lib/src/components/internal/Button/Button.tsx b/packages/lib/src/components/internal/Button/Button.tsx
index ff8dd55077..445c1e8314 100644
--- a/packages/lib/src/components/internal/Button/Button.tsx
+++ b/packages/lib/src/components/internal/Button/Button.tsx
@@ -12,20 +12,14 @@ class Button extends Component<ButtonProps, ButtonState> {
         disabled: false,
         label: '',
         inline: false,
-        target: '_self',
-        onClick: () => {},
-        onMouseEnter: () => {},
-        onMouseLeave: () => {},
-        onFocus: () => {},
-        onBlur: () => {},
-        onKeyPress: () => {}
+        target: '_self'
     };
 
-    public onClick = e => {
+    public onClick = (e: h.JSX.TargetedMouseEvent<HTMLButtonElement>) => {
         e.preventDefault();
 
         if (!this.props.disabled) {
-            this.props.onClick(e, { complete: this.complete });
+            this.props.onClick?.(e, { complete: this.complete });
         }
     };
 
@@ -36,10 +30,6 @@ class Button extends Component<ButtonProps, ButtonState> {
         }, delay);
     };
 
-    public onKeyDown = (event: KeyboardEvent) => {
-        this.props.onKeyDown?.(event);
-    };
-
     render() {
         const {
             classNameModifiers = [],
@@ -59,6 +49,7 @@ class Button extends Component<ButtonProps, ButtonState> {
             onMouseLeave,
             onFocus,
             onBlur,
+            onKeyDown,
             onKeyPress
         }: ButtonProps = this.props;
         const { completed } = this.state;
@@ -124,11 +115,11 @@ class Button extends Component<ButtonProps, ButtonState> {
                 type="button"
                 disabled={disabled}
                 onClick={this.onClick}
-                onKeyDown={this.onKeyDown}
                 aria-label={ariaLabel}
                 aria-describedby={ariaDescribedBy}
                 onMouseEnter={onMouseEnter}
                 onMouseLeave={onMouseLeave}
+                onKeyDown={onKeyDown}
                 onFocus={onFocus}
                 onBlur={onBlur}
                 onKeyPress={onKeyPress}
diff --git a/packages/lib/src/components/internal/Button/types.ts b/packages/lib/src/components/internal/Button/types.ts
index 501fff6a7b..80ae58ebc2 100644
--- a/packages/lib/src/components/internal/Button/types.ts
+++ b/packages/lib/src/components/internal/Button/types.ts
@@ -21,7 +21,7 @@ export interface ButtonProps {
     href?: string;
     target?: string;
     rel?: string;
-    onClick?: (e, callbacks) => void;
+    onClick?: (e: h.JSX.TargetedMouseEvent<HTMLButtonElement>, callbacks?: { complete?: () => void }) => void;
     onKeyDown?: (event: KeyboardEvent) => void;
     onKeyPress?: (event: KeyboardEvent) => void;
     buttonRef?: Ref<HTMLButtonElement>;
diff --git a/packages/lib/src/components/internal/PayButton/PayButton.tsx b/packages/lib/src/components/internal/PayButton/PayButton.tsx
index 9ec2ce2eda..08119eafa6 100644
--- a/packages/lib/src/components/internal/PayButton/PayButton.tsx
+++ b/packages/lib/src/components/internal/PayButton/PayButton.tsx
@@ -17,7 +17,7 @@ export interface PayButtonProps extends ButtonProps {
     status?: string;
     disabled?: boolean;
     icon?: string;
-    onClick?(): void;
+    onClick?: (e: h.JSX.TargetedMouseEvent<HTMLButtonElement>) => void;
 }
 
 const PayButton = ({ amount, secondaryAmount, classNameModifiers = [], label, ...props }: PayButtonProps) => {