diff --git a/packages/backend/test/unit/MfmService.ts b/packages/backend/test/unit/MfmService.ts
new file mode 100644
index 0000000000000000000000000000000000000000..5496738778742cc4c00a79c0685d3eeabf380879
--- /dev/null
+++ b/packages/backend/test/unit/MfmService.ts
@@ -0,0 +1,102 @@
+import * as assert from 'assert';
+import * as mfm from 'mfm-js';
+import { Test } from '@nestjs/testing';
+
+import { CoreModule } from '@/core/CoreModule.js';
+import { MfmService } from '@/core/MfmService.js';
+import { GlobalModule } from '@/GlobalModule.js';
+
+describe('MfmService', () => {
+	let mfmService: MfmService;
+
+	beforeAll(async () => {
+		const app = await Test.createTestingModule({
+			imports: [GlobalModule, CoreModule],
+		}).compile();
+		mfmService = app.get<MfmService>(MfmService);
+	});
+
+	describe('toHtml', () => {
+		test('br', () => {
+			const input = 'foo\nbar\nbaz';
+			const output = '<p><span>foo<br>bar<br>baz</span></p>';
+			assert.equal(mfmService.toHtml(mfm.parse(input)), output);
+		});
+
+		test('br alt', () => {
+			const input = 'foo\r\nbar\rbaz';
+			const output = '<p><span>foo<br>bar<br>baz</span></p>';
+			assert.equal(mfmService.toHtml(mfm.parse(input)), output);
+		});
+	});
+
+	describe('fromHtml', () => {
+		test('p', () => {
+			assert.deepStrictEqual(mfmService.fromHtml('<p>a</p><p>b</p>'), 'a\n\nb');
+		});
+
+		test('block element', () => {
+			assert.deepStrictEqual(mfmService.fromHtml('<div>a</div><div>b</div>'), 'a\nb');
+		});
+
+		test('inline element', () => {
+			assert.deepStrictEqual(mfmService.fromHtml('<ul><li>a</li><li>b</li></ul>'), 'a\nb');
+		});
+
+		test('block code', () => {
+			assert.deepStrictEqual(mfmService.fromHtml('<pre><code>a\nb</code></pre>'), '```\na\nb\n```');
+		});
+
+		test('inline code', () => {
+			assert.deepStrictEqual(mfmService.fromHtml('<code>a</code>'), '`a`');
+		});
+
+		test('quote', () => {
+			assert.deepStrictEqual(mfmService.fromHtml('<blockquote>a\nb</blockquote>'), '> a\n> b');
+		});
+
+		test('br', () => {
+			assert.deepStrictEqual(mfmService.fromHtml('<p>abc<br><br/>d</p>'), 'abc\n\nd');
+		});
+
+		test('link with different text', () => {
+			assert.deepStrictEqual(mfmService.fromHtml('<p>a <a href="https://example.com/b">c</a> d</p>'), 'a [c](https://example.com/b) d');
+		});
+
+		test('link with different text, but not encoded', () => {
+			assert.deepStrictEqual(mfmService.fromHtml('<p>a <a href="https://example.com/ä">c</a> d</p>'), 'a [c](<https://example.com/ä>) d');
+		});
+
+		test('link with same text', () => {
+			assert.deepStrictEqual(mfmService.fromHtml('<p>a <a href="https://example.com/b">https://example.com/b</a> d</p>'), 'a https://example.com/b d');
+		});
+
+		test('link with same text, but not encoded', () => {
+			assert.deepStrictEqual(mfmService.fromHtml('<p>a <a href="https://example.com/ä">https://example.com/ä</a> d</p>'), 'a <https://example.com/ä> d');
+		});
+
+		test('link with no url', () => {
+			assert.deepStrictEqual(mfmService.fromHtml('<p>a <a href="b">c</a> d</p>'), 'a [c](b) d');
+		});
+
+		test('link without href', () => {
+			assert.deepStrictEqual(mfmService.fromHtml('<p>a <a>c</a> d</p>'), 'a c d');
+		});
+
+		test('link without text', () => {
+			assert.deepStrictEqual(mfmService.fromHtml('<p>a <a href="https://example.com/b"></a> d</p>'), 'a https://example.com/b d');
+		});
+
+		test('link without both', () => {
+			assert.deepStrictEqual(mfmService.fromHtml('<p>a <a></a> d</p>'), 'a  d');
+		});
+
+		test('mention', () => {
+			assert.deepStrictEqual(mfmService.fromHtml('<p>a <a href="https://example.com/@user" class="u-url mention">@user</a> d</p>'), 'a @user@example.com d');
+		});
+
+		test('hashtag', () => {
+			assert.deepStrictEqual(mfmService.fromHtml('<p>a <a href="https://example.com/tags/a">#a</a> d</p>', ['#a']), 'a #a d');
+		});
+	});
+});
diff --git a/packages/backend/test/unit/ReactionService.ts b/packages/backend/test/unit/ReactionService.ts
new file mode 100644
index 0000000000000000000000000000000000000000..6a20a1e08e15361a9f50c9c3ad21e3e70dce7107
--- /dev/null
+++ b/packages/backend/test/unit/ReactionService.ts
@@ -0,0 +1,92 @@
+import * as assert from 'assert';
+import { Test } from '@nestjs/testing';
+
+import { CoreModule } from '@/core/CoreModule.js';
+import { ReactionService } from '@/core/ReactionService.js';
+import { GlobalModule } from '@/GlobalModule.js';
+
+describe('ReactionService', () => {
+	let reactionService: ReactionService;
+
+	beforeAll(async () => {
+		const app = await Test.createTestingModule({
+			imports: [GlobalModule, CoreModule],
+		}).compile();
+		reactionService = app.get<ReactionService>(ReactionService);
+	});
+
+	describe('toDbReaction', () => {
+		test('絵文字リアクションはそのまま', async () => {
+			assert.strictEqual(await reactionService.toDbReaction('👍'), '👍');
+			assert.strictEqual(await reactionService.toDbReaction('🍅'), '🍅');
+		});
+
+		test('既存のリアクションは絵文字化する pudding', async () => {
+			assert.strictEqual(await reactionService.toDbReaction('pudding'), '🍮');
+		});
+
+		test('既存のリアクションは絵文字化する like', async () => {
+			assert.strictEqual(await reactionService.toDbReaction('like'), '👍');
+		});
+
+		test('既存のリアクションは絵文字化する love', async () => {
+			assert.strictEqual(await reactionService.toDbReaction('love'), '❤');
+		});
+
+		test('既存のリアクションは絵文字化する laugh', async () => {
+			assert.strictEqual(await reactionService.toDbReaction('laugh'), '😆');
+		});
+
+		test('既存のリアクションは絵文字化する hmm', async () => {
+			assert.strictEqual(await reactionService.toDbReaction('hmm'), '🤔');
+		});
+
+		test('既存のリアクションは絵文字化する surprise', async () => {
+			assert.strictEqual(await reactionService.toDbReaction('surprise'), '😮');
+		});
+
+		test('既存のリアクションは絵文字化する congrats', async () => {
+			assert.strictEqual(await reactionService.toDbReaction('congrats'), '🎉');
+		});
+
+		test('既存のリアクションは絵文字化する angry', async () => {
+			assert.strictEqual(await reactionService.toDbReaction('angry'), '💢');
+		});
+
+		test('既存のリアクションは絵文字化する confused', async () => {
+			assert.strictEqual(await reactionService.toDbReaction('confused'), '😥');
+		});
+
+		test('既存のリアクションは絵文字化する rip', async () => {
+			assert.strictEqual(await reactionService.toDbReaction('rip'), '😇');
+		});
+
+		test('既存のリアクションは絵文字化する star', async () => {
+			assert.strictEqual(await reactionService.toDbReaction('star'), '⭐');
+		});
+
+		test('異体字セレクタ除去', async () => {
+			assert.strictEqual(await reactionService.toDbReaction('㊗️'), '㊗');
+		});
+
+		test('異体字セレクタ除去 必要なし', async () => {
+			assert.strictEqual(await reactionService.toDbReaction('㊗'), '㊗');
+		});
+
+		test('fallback - undefined', async () => {
+			assert.strictEqual(await reactionService.toDbReaction(undefined), '👍');
+		});
+
+		test('fallback - null', async () => {
+			assert.strictEqual(await reactionService.toDbReaction(null), '👍');
+		});
+
+		test('fallback - empty', async () => {
+			assert.strictEqual(await reactionService.toDbReaction(''), '👍');
+		});
+
+		test('fallback - unknown', async () => {
+			assert.strictEqual(await reactionService.toDbReaction('unknown'), '👍');
+		});
+	});
+});
diff --git a/packages/backend/test/unit/mfm.ts b/packages/backend/test/unit/mfm.ts
deleted file mode 100644
index d7ef14dfa35d51f15882b8ebc62b515a338e5226..0000000000000000000000000000000000000000
--- a/packages/backend/test/unit/mfm.ts
+++ /dev/null
@@ -1,109 +0,0 @@
-import * as assert from 'assert';
-import * as mfm from 'mfm-js';
-import { Test } from '@nestjs/testing';
-
-import { CoreModule } from '@/core/CoreModule.js';
-import { MfmService } from '@/core/MfmService.js';
-import { GlobalModule } from '@/GlobalModule.js';
-
-describe('toHtml', () => {
-	let mfmService: MfmService;
-
-	beforeEach(async () => {
-		const app = await Test.createTestingModule({
-			imports: [GlobalModule, CoreModule],
-		}).compile();
-		mfmService = app.get<MfmService>(MfmService);
-	});
-
-	test('br', () => {
-		const input = 'foo\nbar\nbaz';
-		const output = '<p><span>foo<br>bar<br>baz</span></p>';
-		assert.equal(mfmService.toHtml(mfm.parse(input)), output);
-	});
-
-	test('br alt', () => {
-		const input = 'foo\r\nbar\rbaz';
-		const output = '<p><span>foo<br>bar<br>baz</span></p>';
-		assert.equal(mfmService.toHtml(mfm.parse(input)), output);
-	});
-});
-
-describe('fromHtml', () => {
-	let mfmService: MfmService;
-
-	beforeEach(async () => {
-		const app = await Test.createTestingModule({
-			imports: [GlobalModule, CoreModule],
-		}).compile();
-		mfmService = app.get<MfmService>(MfmService);
-	});
-
-	test('p', () => {
-		assert.deepStrictEqual(mfmService.fromHtml('<p>a</p><p>b</p>'), 'a\n\nb');
-	});
-
-	test('block element', () => {
-		assert.deepStrictEqual(mfmService.fromHtml('<div>a</div><div>b</div>'), 'a\nb');
-	});
-
-	test('inline element', () => {
-		assert.deepStrictEqual(mfmService.fromHtml('<ul><li>a</li><li>b</li></ul>'), 'a\nb');
-	});
-
-	test('block code', () => {
-		assert.deepStrictEqual(mfmService.fromHtml('<pre><code>a\nb</code></pre>'), '```\na\nb\n```');
-	});
-
-	test('inline code', () => {
-		assert.deepStrictEqual(mfmService.fromHtml('<code>a</code>'), '`a`');
-	});
-
-	test('quote', () => {
-		assert.deepStrictEqual(mfmService.fromHtml('<blockquote>a\nb</blockquote>'), '> a\n> b');
-	});
-
-	test('br', () => {
-		assert.deepStrictEqual(mfmService.fromHtml('<p>abc<br><br/>d</p>'), 'abc\n\nd');
-	});
-
-	test('link with different text', () => {
-		assert.deepStrictEqual(mfmService.fromHtml('<p>a <a href="https://example.com/b">c</a> d</p>'), 'a [c](https://example.com/b) d');
-	});
-
-	test('link with different text, but not encoded', () => {
-		assert.deepStrictEqual(mfmService.fromHtml('<p>a <a href="https://example.com/ä">c</a> d</p>'), 'a [c](<https://example.com/ä>) d');
-	});
-
-	test('link with same text', () => {
-		assert.deepStrictEqual(mfmService.fromHtml('<p>a <a href="https://example.com/b">https://example.com/b</a> d</p>'), 'a https://example.com/b d');
-	});
-
-	test('link with same text, but not encoded', () => {
-		assert.deepStrictEqual(mfmService.fromHtml('<p>a <a href="https://example.com/ä">https://example.com/ä</a> d</p>'), 'a <https://example.com/ä> d');
-	});
-
-	test('link with no url', () => {
-		assert.deepStrictEqual(mfmService.fromHtml('<p>a <a href="b">c</a> d</p>'), 'a [c](b) d');
-	});
-
-	test('link without href', () => {
-		assert.deepStrictEqual(mfmService.fromHtml('<p>a <a>c</a> d</p>'), 'a c d');
-	});
-
-	test('link without text', () => {
-		assert.deepStrictEqual(mfmService.fromHtml('<p>a <a href="https://example.com/b"></a> d</p>'), 'a https://example.com/b d');
-	});
-
-	test('link without both', () => {
-		assert.deepStrictEqual(mfmService.fromHtml('<p>a <a></a> d</p>'), 'a  d');
-	});
-
-	test('mention', () => {
-		assert.deepStrictEqual(mfmService.fromHtml('<p>a <a href="https://example.com/@user" class="u-url mention">@user</a> d</p>'), 'a @user@example.com d');
-	});
-
-	test('hashtag', () => {
-		assert.deepStrictEqual(mfmService.fromHtml('<p>a <a href="https://example.com/tags/a">#a</a> d</p>', ['#a']), 'a #a d');
-	});
-});
diff --git a/packages/backend/test/unit/reaction-lib.ts b/packages/backend/test/unit/reaction-lib.ts
deleted file mode 100644
index ac8e143a5dc58f766fb6854f3e1462b308bffc79..0000000000000000000000000000000000000000
--- a/packages/backend/test/unit/reaction-lib.ts
+++ /dev/null
@@ -1,90 +0,0 @@
-import * as assert from 'assert';
-import { Test } from '@nestjs/testing';
-
-import { CoreModule } from '@/core/CoreModule.js';
-import { ReactionService } from '@/core/ReactionService.js';
-import { GlobalModule } from '@/GlobalModule.js';
-
-describe('toDbReaction', () => {
-	let reactionService: ReactionService;
-
-	beforeEach(async () => {
-		const app = await Test.createTestingModule({
-			imports: [GlobalModule, CoreModule],
-		}).compile();
-		reactionService = app.get<ReactionService>(ReactionService);
-	});
-
-	test('絵文字リアクションはそのまま', async () => {
-		assert.strictEqual(await reactionService.toDbReaction('👍'), '👍');
-		assert.strictEqual(await reactionService.toDbReaction('🍅'), '🍅');
-	});
-
-	test('既存のリアクションは絵文字化する pudding', async () => {
-		assert.strictEqual(await reactionService.toDbReaction('pudding'), '🍮');
-	});
-
-	test('既存のリアクションは絵文字化する like', async () => {
-		assert.strictEqual(await reactionService.toDbReaction('like'), '👍');
-	});
-
-	test('既存のリアクションは絵文字化する love', async () => {
-		assert.strictEqual(await reactionService.toDbReaction('love'), '❤');
-	});
-
-	test('既存のリアクションは絵文字化する laugh', async () => {
-		assert.strictEqual(await reactionService.toDbReaction('laugh'), '😆');
-	});
-
-	test('既存のリアクションは絵文字化する hmm', async () => {
-		assert.strictEqual(await reactionService.toDbReaction('hmm'), '🤔');
-	});
-
-	test('既存のリアクションは絵文字化する surprise', async () => {
-		assert.strictEqual(await reactionService.toDbReaction('surprise'), '😮');
-	});
-
-	test('既存のリアクションは絵文字化する congrats', async () => {
-		assert.strictEqual(await reactionService.toDbReaction('congrats'), '🎉');
-	});
-
-	test('既存のリアクションは絵文字化する angry', async () => {
-		assert.strictEqual(await reactionService.toDbReaction('angry'), '💢');
-	});
-
-	test('既存のリアクションは絵文字化する confused', async () => {
-		assert.strictEqual(await reactionService.toDbReaction('confused'), '😥');
-	});
-
-	test('既存のリアクションは絵文字化する rip', async () => {
-		assert.strictEqual(await reactionService.toDbReaction('rip'), '😇');
-	});
-
-	test('既存のリアクションは絵文字化する star', async () => {
-		assert.strictEqual(await reactionService.toDbReaction('star'), '⭐');
-	});
-
-	test('異体字セレクタ除去', async () => {
-		assert.strictEqual(await reactionService.toDbReaction('㊗️'), '㊗');
-	});
-
-	test('異体字セレクタ除去 必要なし', async () => {
-		assert.strictEqual(await reactionService.toDbReaction('㊗'), '㊗');
-	});
-
-	test('fallback - undefined', async () => {
-		assert.strictEqual(await reactionService.toDbReaction(undefined), '👍');
-	});
-
-	test('fallback - null', async () => {
-		assert.strictEqual(await reactionService.toDbReaction(null), '👍');
-	});
-
-	test('fallback - empty', async () => {
-		assert.strictEqual(await reactionService.toDbReaction(''), '👍');
-	});
-
-	test('fallback - unknown', async () => {
-		assert.strictEqual(await reactionService.toDbReaction('unknown'), '👍');
-	});
-});