diff --git a/addons/xterm-addon-serialize/test/SerializeAddon.api.ts b/addons/xterm-addon-serialize/test/SerializeAddon.api.ts
index 5c4ae437..b86b066b 100644
--- a/addons/xterm-addon-serialize/test/SerializeAddon.api.ts
+++ b/addons/xterm-addon-serialize/test/SerializeAddon.api.ts
@@ -83,7 +83,7 @@ describe('SerializeAddon', () => {
     const buffer3 = await page.evaluate(`inspectBuffer(term.buffer.normal);`);
 
     await page.evaluate(`term.reset();`);
-    await writeRawSync(page, '1234567890n12345');
+    await writeRawSync(page, '123456789012345');
     const buffer4 = await page.evaluate(`inspectBuffer(term.buffer.normal);`);
 
     assert.throw(() => {