diff --git a/test/text.ts b/test/text.ts
index 8a210575d..e2527cfe0 100644
--- a/test/text.ts
+++ b/test/text.ts
@@ -19,54 +19,61 @@ describe('Text', () => {
 		], tokens);
 	});
 
-	it('bold', () => {
-		const tokens = analyze('**Strawberry** Pasta');
-		assert.deepEqual([
-			{ type: 'bold', content: '**Strawberry**', bold: 'Strawberry' },
-			{ type: 'text', content: ' Pasta' }
-		], tokens);
+	it('逆関数で正しく復元できる', () => {
+		const text = '@himawari お腹ペコい :cat: #yryr';
+		assert.equal(analyze(text).map(x => x.content).join(''), text);
 	});
 
-	it('mention', () => {
-		const tokens = analyze('@himawari お腹ペコい');
-		assert.deepEqual([
-			{ type: 'mention', content: '@himawari', username: 'himawari' },
-			{ type: 'text', content: ' お腹ペコい' }
-		], tokens);
-	});
+	describe('elements', () => {
+		it('bold', () => {
+			const tokens = analyze('**Strawberry** Pasta');
+			assert.deepEqual([
+				{ type: 'bold', content: '**Strawberry**', bold: 'Strawberry' },
+				{ type: 'text', content: ' Pasta' }
+			], tokens);
+		});
 
-	it('hashtag', () => {
-		const tokens = analyze('Strawberry Pasta #alice');
-		assert.deepEqual([
-			{ type: 'text', content: 'Strawberry Pasta ' },
-			{ type: 'hashtag', content: '#alice', hashtag: 'alice' }
-		], tokens);
-	});
+		it('mention', () => {
+			const tokens = analyze('@himawari お腹ペコい');
+			assert.deepEqual([
+				{ type: 'mention', content: '@himawari', username: 'himawari' },
+				{ type: 'text', content: ' お腹ペコい' }
+			], tokens);
+		});
 
-	it('link', () => {
-		const tokens = analyze('https://himasaku.net');
-		assert.deepEqual([
-			{ type: 'link', content: 'https://himasaku.net' }
-		], tokens);
-	});
+		it('hashtag', () => {
+			const tokens = analyze('Strawberry Pasta #alice');
+			assert.deepEqual([
+				{ type: 'text', content: 'Strawberry Pasta ' },
+				{ type: 'hashtag', content: '#alice', hashtag: 'alice' }
+			], tokens);
+		});
 
-	it('emoji', () => {
-		const tokens = analyze(':cat:');
-		assert.deepEqual([
-			{ type: 'emoji', content: ':cat:', emoji: 'cat'}
-		], tokens);
-	});
+		it('link', () => {
+			const tokens = analyze('https://himasaku.net');
+			assert.deepEqual([
+				{ type: 'link', content: 'https://himasaku.net' }
+			], tokens);
+		});
 
-	it('block code', () => {
-		const tokens = analyze('```\nvar x = "Strawberry Pasta";\n```');
-		assert.equal(tokens[0].type, 'code');
-		assert.equal(tokens[0].content, '```\nvar x = "Strawberry Pasta";\n```');
-	});
+		it('emoji', () => {
+			const tokens = analyze(':cat:');
+			assert.deepEqual([
+				{ type: 'emoji', content: ':cat:', emoji: 'cat'}
+			], tokens);
+		});
 
-	it('inline code', () => {
-		const tokens = analyze('`var x = "Strawberry Pasta";`');
-		assert.equal(tokens[0].type, 'inline-code');
-		assert.equal(tokens[0].content, '`var x = "Strawberry Pasta";`');
+		it('block code', () => {
+			const tokens = analyze('```\nvar x = "Strawberry Pasta";\n```');
+			assert.equal(tokens[0].type, 'code');
+			assert.equal(tokens[0].content, '```\nvar x = "Strawberry Pasta";\n```');
+		});
+
+		it('inline code', () => {
+			const tokens = analyze('`var x = "Strawberry Pasta";`');
+			assert.equal(tokens[0].type, 'inline-code');
+			assert.equal(tokens[0].content, '`var x = "Strawberry Pasta";`');
+		});
 	});
 
 	describe('syntax highlighting', () => {