diff --git a/packages/playwright-ct-angular/registerSource.mjs b/packages/playwright-ct-angular/registerSource.mjs
index 5fcb88384a..f6884eebee 100644
--- a/packages/playwright-ct-angular/registerSource.mjs
+++ b/packages/playwright-ct-angular/registerSource.mjs
@@ -40,6 +40,8 @@ getTestBed().initTestEnvironment(
 );
 
 window.playwrightMount = async (component, rootElement, hooksConfig) => {
+  __pwAssertIsNotJsx(component);
+
   for (const hook of window.__pw_hooks_before_mount || [])
     await hook({ hooksConfig, TestBed });
 
@@ -69,6 +71,8 @@ window.playwrightUnmount = async rootElement => {
  * @param {{type: import('@angular/core').Type<unknown>} & import('./index').MountOptions | {type: string} & import('./index').MountTemplateOptions} component
  */
 window.playwrightUpdate = async (rootElement, component) => {
+  __pwAssertIsNotJsx(component);
+
   const fixture = __pwFixtureRegistry.get(rootElement.id);
   if (!fixture)
     throw new Error('Component was not mounted');
@@ -165,6 +169,10 @@ function __pwUpdateEvents(fixture, events = {}) {
   __pwOutputSubscriptionRegistry.set(fixture, outputSubscriptionRecord);
 }
 
+function __pwAssertIsNotJsx(component) {
+  if (component.__pw_type === 'jsx')
+    throw new Error('JSX mount notation is not supported');
+}
 
 /**
  * @param {ComponentInfo} component
diff --git a/tests/components/ct-angular/tests/unsupported.spec.tsx b/tests/components/ct-angular/tests/unsupported.spec.tsx
new file mode 100644
index 0000000000..caebee478e
--- /dev/null
+++ b/tests/components/ct-angular/tests/unsupported.spec.tsx
@@ -0,0 +1,6 @@
+import { expect, test } from '@playwright/experimental-ct-angular';
+
+test('should throw an error when mounting JSX', async ({ mount }) => {
+  // @ts-ignore
+  await expect(mount(<h1/> as any)).rejects.toThrow('JSX mount notation is not supported');
+});