diff --git a/npm/oxc-parser/README.md b/npm/oxc-parser/README.md
index d186f98d1ca82..02d7a9a172566 100644
--- a/npm/oxc-parser/README.md
+++ b/npm/oxc-parser/README.md
@@ -7,12 +7,11 @@ import assert from 'assert';
 import oxc from 'oxc-parser';
 
 const sourceText = "let foo: Foo = 'foo';";
-// Filename extension is used to determine which
-// dialect to parse source as
-const options = { sourceFilename: 'text.tsx' };
+// Filename extension is used to determine which dialect to parse source as.
+const filename = "test.tsx";
 
-test(oxc.parseSync(sourceText, options));
-test(await oxc.parseAsync(sourceText, options));
+test(oxc.parseSync(filename, sourceText, options));
+test(await oxc.parseAsync(filename, sourceText, options));
 
 function test(ret) {
   assert(ret.program.body.length == 1);