diff --git a/src/compiler/utils/string_with_sourcemap.ts b/src/compiler/utils/string_with_sourcemap.ts
index 4a442b964a..dc182a6321 100644
--- a/src/compiler/utils/string_with_sourcemap.ts
+++ b/src/compiler/utils/string_with_sourcemap.ts
@@ -291,8 +291,7 @@ export function apply_preprocessor_sourcemap(filename: string, svelte_map: Sourc
 	return result_map as SourceMap;
 }
 
-// find attached sourcemap in processed.code
-// TODO? handle multiple attached maps, combine with processed.map
+// parse attached sourcemap in processed.code
 export function parse_attached_sourcemap(processed: Processed): void {
 	const magic_prefix = '\n/*# sourceMappingURL=data:application/json;';
 	const cut_index = processed.code.lastIndexOf('\n');
diff --git a/test/sourcemaps/samples/attached-sourcemap/test.js b/test/sourcemaps/samples/attached-sourcemap/test.js
index fde2190808..c5b4d7989d 100644
--- a/test/sourcemaps/samples/attached-sourcemap/test.js
+++ b/test/sourcemaps/samples/attached-sourcemap/test.js
@@ -7,7 +7,8 @@ export function test({ input, css, js }) {
 	let out_obj, loc_output, actual, loc_input, expected;
 
 	out_obj = js;
-	// we need the seconds occurence in output.js
+	// we need the second occurence of 'done_replace_script_2' in output.js
+	// the first occurence is mapped back to markup '{done_replace_script_2}'
 	loc_output = out_obj.locate_1('done_replace_script_2');
 	loc_output = out_obj.locate_1('done_replace_script_2', loc_output.character + 1);
 	actual = out_obj.mapConsumer.originalPositionFor(loc_output);
@@ -22,7 +23,6 @@ export function test({ input, css, js }) {
 	out_obj = css;
 	loc_output = out_obj.locate_1('.done_replace_style_2');
 	actual = out_obj.mapConsumer.originalPositionFor(loc_output);
-	// first occurence in input.svelte
 	loc_input = input.locate_1('.replace_me_style');
 	expected = {
 		source: 'input.svelte',