diff --git a/packages/playwright-core/src/server/page.ts b/packages/playwright-core/src/server/page.ts
index 25394b1b5c..f2e59aa56f 100644
--- a/packages/playwright-core/src/server/page.ts
+++ b/packages/playwright-core/src/server/page.ts
@@ -846,6 +846,8 @@ export class PageBinding {
         const handle = await context.evaluateHandle(takeHandle, { name, seq }).catch(e => null);
         result = await binding.playwrightFunction({ frame: context.frame, page, context: page._browserContext }, handle);
       } else {
+        if (!Array.isArray(serializedArgs))
+          throw new Error(`serializedArgs is not an array. This can happen when Array.prototype.toJSON is defined incorrectly`);
         const args = serializedArgs!.map(a => parseEvaluationResultValue(a));
         result = await binding.playwrightFunction({ frame: context.frame, page, context: page._browserContext }, ...args);
       }
diff --git a/tests/page/page-expose-function.spec.ts b/tests/page/page-expose-function.spec.ts
index ece4a602df..fc18ada02b 100644
--- a/tests/page/page-expose-function.spec.ts
+++ b/tests/page/page-expose-function.spec.ts
@@ -300,3 +300,12 @@ it('should work with busted Array.prototype.map/push', async ({ page, server })
   await page.exposeFunction('add', (a, b) => a + b);
   expect(await page.evaluate('add(5, 6)')).toBe(11);
 });
+
+it('should fail with busted Array.prototype.toJSON', async ({ page }) => {
+  await page.evaluateHandle(() => (Array.prototype as any).toJSON = () => '"[]"');
+
+  await page.exposeFunction('add', (a, b) => a + b);
+  await expect(() => page.evaluate(`add(5, 6)`)).rejects.toThrowError('serializedArgs is not an array. This can happen when Array.prototype.toJSON is defined incorrectly');
+
+  expect.soft(await page.evaluate(() => ([] as any).toJSON())).toBe('"[]"');
+});