diff --git a/packages/core/integration-tests/test/javascript.js b/packages/core/integration-tests/test/javascript.js
index 65f185192cb..1c63553f088 100644
--- a/packages/core/integration-tests/test/javascript.js
+++ b/packages/core/integration-tests/test/javascript.js
@@ -6366,6 +6366,7 @@ describe('javascript', function () {
   });
 
   it('should retain unicode escape sequences', async function () {
+    // See issue #8877
     await fsFixture(overlayFS, __dirname)`
         src/index.js:
           export default ['\\u0085', '\\u200b', '\\ufffe'];
diff --git a/packages/transformers/js/core/src/lib.rs b/packages/transformers/js/core/src/lib.rs
index b2801f367a4..5fd47373db9 100644
--- a/packages/transformers/js/core/src/lib.rs
+++ b/packages/transformers/js/core/src/lib.rs
@@ -568,6 +568,7 @@ fn emit(
     ));
     let config = swc_core::ecma::codegen::Config::default()
       .with_target(swc_core::ecma::ast::EsVersion::Es5)
+      // Make sure the output works regardless of whether it's loaded with the correct (utf8) encoding
       .with_ascii_only(true);
     let mut emitter = swc_core::ecma::codegen::Emitter {
       cfg: config,