diff --git a/packages/frontend/src/components/SkPatternTest.vue b/packages/frontend/src/components/SkPatternTest.vue
index f3bbf723a0..660b5d8a0a 100644
--- a/packages/frontend/src/components/SkPatternTest.vue
+++ b/packages/frontend/src/components/SkPatternTest.vue
@@ -27,8 +27,8 @@ import { i18n } from '@/i18n';
 import MkFolder from '@/components/MkFolder.vue';
 import MkButton from '@/components/MkButton.vue';
 import MkTextarea from '@/components/MkTextarea.vue';
-import { parseMutes } from '@/utility/parse-mutes';
-import { checkWordMute } from '@/utility/check-word-mute';
+import { parseMutes } from '@/utility/parse-mutes.js';
+import { getMutedWords } from '@/utility/check-word-mute.js';
 
 const props = defineProps<{
 	mutedWords?: string | null,
@@ -45,8 +45,8 @@ function testWordMutes() {
 
 	try {
 		const mutes = parseMutes(props.mutedWords);
-		const matches = checkWordMute(testWords.value, null, mutes);
-		testMatches.value = matches ? matches.join(', ') : '';
+		const matches = getMutedWords(mutes, testWords.value);
+		testMatches.value = matches.join(', ');
 	} catch {
 		// Error is displayed by above function
 		testMatches.value = null;
diff --git a/packages/frontend/src/utility/check-word-mute.ts b/packages/frontend/src/utility/check-word-mute.ts
index 8301e88fdd..3f363573e7 100644
--- a/packages/frontend/src/utility/check-word-mute.ts
+++ b/packages/frontend/src/utility/check-word-mute.ts
@@ -128,13 +128,15 @@ function getMutes(note: Misskey.entities.Note, withHardMute: boolean, overrides:
 function isHardMuted(note: Misskey.entities.Note): boolean {
 	if (!$i?.hardMutedWords.length) return false;
 
-	return containsMutedWord($i.hardMutedWords, note);
+	const inputs = expandNote(note);
+	return containsMutedWord($i.hardMutedWords, inputs);
 }
 
 function isSoftMuted(note: Misskey.entities.Note): string[] {
 	if (!$i?.mutedWords.length) return [];
 
-	return getMutedWords($i.mutedWords, note);
+	const inputs = expandNote(note);
+	return getMutedWords($i.mutedWords, inputs);
 }
 
 function isSensitiveMuted(note: Misskey.entities.Note): boolean {
@@ -151,7 +153,7 @@ function isSensitiveMuted(note: Misskey.entities.Note): boolean {
 	return tl_withSensitive?.value === false;
 }
 
-function getMutedWords(mutedWords: (string | string[])[], note: Misskey.entities.Note): string[] {
+export function getMutedWords(mutedWords: (string | string[])[], inputs: Iterable<string>): string[] {
 	// Parse mutes
 	const { regexMutes, patternMutes } = parseMutes(mutedWords);
 
@@ -163,7 +165,7 @@ function getMutedWords(mutedWords: (string | string[])[], note: Misskey.entities
 	const matches = new Set<string>();
 
 	// Expand notes into searchable test
-	for (const text of expandNote(note)) {
+	for (const text of inputs) {
 		for (const pattern of patternMutes) {
 			// Case-sensitive, non-boundary search for backwards compatibility
 			if (pattern.every(word => text.includes(word))) {
@@ -182,7 +184,7 @@ function getMutedWords(mutedWords: (string | string[])[], note: Misskey.entities
 	return Array.from(matches);
 }
 
-function containsMutedWord(mutedWords: (string | string[])[], note: Misskey.entities.Note): boolean {
+export function containsMutedWord(mutedWords: (string | string[])[], inputs: Iterable<string>): boolean {
 	// Parse mutes
 	const { regexMutes, patternMutes } = parseMutes(mutedWords);
 
@@ -192,7 +194,7 @@ function containsMutedWord(mutedWords: (string | string[])[], note: Misskey.enti
 	}
 
 	// Expand notes into searchable test
-	for (const text of expandNote(note)) {
+	for (const text of inputs) {
 		for (const pattern of patternMutes) {
 			// Case-sensitive, non-boundary search for backwards compatibility
 			if (pattern.every(word => text.includes(word))) {
@@ -208,7 +210,7 @@ function containsMutedWord(mutedWords: (string | string[])[], note: Misskey.enti
 	return false;
 }
 
-function *expandNote(note: Misskey.entities.Note): Generator<string> {
+export function *expandNote(note: Misskey.entities.Note): Generator<string> {
 	if (note.cw) yield note.cw;
 	if (note.text) yield note.text;
 	if (note.files) {