diff --git a/packages/component-meta/tests/index.spec.ts b/packages/component-meta/tests/index.spec.ts
index 83d034da2e..dfe7f7dcd5 100644
--- a/packages/component-meta/tests/index.spec.ts
+++ b/packages/component-meta/tests/index.spec.ts
@@ -727,7 +727,7 @@ const worker = (checker: ComponentMetaChecker, withTsconfig: boolean) => describ
 	test('emits-generic', () => {
 		const componentPath = path.resolve(__dirname, '../../../test-workspace/component-meta/events/component-generic.vue');
 		const meta = checker.getComponentMeta(componentPath);
-		const foo = meta.events.find(event =>event.name === 'foo');
+		const foo = meta.events.find(event => event.name === 'foo');
 
 		expect(foo?.description).toBe('Emitted when foo...');
 	});
@@ -736,7 +736,7 @@ const worker = (checker: ComponentMetaChecker, withTsconfig: boolean) => describ
 	test.skip('emits-class', () => {
 		const componentPath = path.resolve(__dirname, '../../../test-workspace/component-meta/events/component-class.vue');
 		const meta = checker.getComponentMeta(componentPath);
-		const foo = meta.events.find(event =>event.name === 'foo');
+		const foo = meta.events.find(event => event.name === 'foo');
 
 		expect(foo?.description).toBe('Emitted when foo...');
 	});
@@ -858,7 +858,7 @@ const checkerOptions: MetaCheckerOptions = {
 };
 const tsconfigChecker = createChecker(
 	path.resolve(__dirname, '../../../test-workspace/component-meta/tsconfig.json'),
-	checkerOptions,
+	checkerOptions
 );
 const noTsConfigChecker = createCheckerByJson(
 	path.resolve(__dirname, '../../../test-workspace/component-meta'),
@@ -868,7 +868,7 @@ const noTsConfigChecker = createCheckerByJson(
 			"**/*",
 		],
 	},
-	checkerOptions,
+	checkerOptions
 );
 
 worker(tsconfigChecker, true);
diff --git a/packages/language-service/tests/complete.ts b/packages/language-service/tests/complete.ts
index 959ae6efac..582287949d 100644
--- a/packages/language-service/tests/complete.ts
+++ b/packages/language-service/tests/complete.ts
@@ -43,7 +43,7 @@ for (const dirName of testDirs) {
 					let complete = await tester.languageService.getCompletionItems(
 						uri,
 						position,
-						{ triggerKind: 1 satisfies typeof vscode.CompletionTriggerKind.Invoked },
+						{ triggerKind: 1 satisfies typeof vscode.CompletionTriggerKind.Invoked }
 					);
 
 					if (!complete.items.length) {
@@ -51,7 +51,7 @@ for (const dirName of testDirs) {
 						complete = await tester.languageService.getCompletionItems(
 							uri,
 							position,
-							{ triggerKind: 1 satisfies typeof vscode.CompletionTriggerKind.Invoked },
+							{ triggerKind: 1 satisfies typeof vscode.CompletionTriggerKind.Invoked }
 						);
 					}
 
@@ -107,7 +107,7 @@ function findCompleteActions(text: string) {
 
 	return [...text.matchAll(/(\^*)complete:\s*([\S]*)/g)].map(flag => {
 
-		const offset = flag.index!;
+		const offset = flag.index;
 		const label = flag[2];
 
 		return {
diff --git a/packages/language-service/tests/findDefinition.ts b/packages/language-service/tests/findDefinition.ts
index 77a0362b7a..c359d44e3b 100644
--- a/packages/language-service/tests/findDefinition.ts
+++ b/packages/language-service/tests/findDefinition.ts
@@ -36,7 +36,7 @@ for (const dirName of testDirs) {
 
 					const locations = await tester.languageService.getDefinition(
 						uri,
-						position,
+						position
 					);
 
 					expect(locations).toBeDefined();
@@ -78,7 +78,7 @@ function findActions(text: string) {
 
 	return [...text.matchAll(definitionReg)].map(flag => {
 
-		const offset = flag.index!;
+		const offset = flag.index;
 		const targetFile = flag[2];
 		const targeRange = {
 			start: Number(flag[3]),
diff --git a/packages/language-service/tests/inlayHint.ts b/packages/language-service/tests/inlayHint.ts
index f95e8b3470..47a4acc65f 100644
--- a/packages/language-service/tests/inlayHint.ts
+++ b/packages/language-service/tests/inlayHint.ts
@@ -38,7 +38,7 @@ for (const dirName of testDirs) {
 
 					const inlayHints = await tester.languageService.getInlayHints(
 						uri,
-						range,
+						range
 					);
 
 					const inlayHint = inlayHints?.find(inlayHint => inlayHint.label === action.label);
@@ -69,7 +69,7 @@ function findActions(text: string) {
 
 	return [...text.matchAll(inlayHintReg)].map(flag => {
 
-		const offset = flag.index!;
+		const offset = flag.index;
 		const label = flag[2];
 
 		return {
diff --git a/packages/language-service/tests/reference.ts b/packages/language-service/tests/reference.ts
index 9df5698645..d7fab82f3b 100644
--- a/packages/language-service/tests/reference.ts
+++ b/packages/language-service/tests/reference.ts
@@ -36,7 +36,7 @@ for (const dirName of testDirs) {
 					const locations = await tester.languageService.getReferences(
 						uri,
 						position,
-						{ includeDeclaration: true },
+						{ includeDeclaration: true }
 					);
 
 					expect(locations).toBeDefined();
@@ -67,7 +67,7 @@ function findActions(text: string) {
 
 	return [...text.matchAll(referenceReg)].map(flag => {
 
-		const offset = flag.index!;
+		const offset = flag.index;
 		// The definition itself is also counted
 		const count = Number(flag[2]) + 1;
 
diff --git a/packages/language-service/tests/rename.ts b/packages/language-service/tests/rename.ts
index c21b964d98..b3655b0ab4 100644
--- a/packages/language-service/tests/rename.ts
+++ b/packages/language-service/tests/rename.ts
@@ -39,7 +39,7 @@ for (const dirName of testDirs) {
 						const edit = await tester.languageService.getRenameEdits(
 							uri,
 							position,
-							action.newName,
+							action.newName
 						);
 
 						expect(edit).toBeDefined();
@@ -86,7 +86,7 @@ function findRenameActions(text: string) {
 
 	return [...text.matchAll(renameReg)].map(flag => {
 
-		const start = flag.index!;
+		const start = flag.index;
 		const end = start + flag[1].length;
 		const newName = flag[2];
 
diff --git a/packages/language-service/tests/utils/mockEnv.ts b/packages/language-service/tests/utils/mockEnv.ts
index d6781bd61b..2f642fe373 100644
--- a/packages/language-service/tests/utils/mockEnv.ts
+++ b/packages/language-service/tests/utils/mockEnv.ts
@@ -12,7 +12,7 @@ export function createMockServiceEnv(
 ): LanguageServiceEnvironment {
 	return {
 		workspaceFolders: [rootUri],
-		async getConfiguration(section: string) {
+		getConfiguration(section: string) {
 			const settings = getSettings();
 			if (settings[section]) {
 				return settings[section];
diff --git a/packages/tsc/tests/index.spec.ts b/packages/tsc/tests/index.spec.ts
index 7d39072d75..feff8b7560 100644
--- a/packages/tsc/tests/index.spec.ts
+++ b/packages/tsc/tests/index.spec.ts
@@ -57,19 +57,19 @@ function runVueTsc(cwd: string) {
 			{
 				silent: true,
 				cwd
-			},
+			}
 		);
 
 		cp.stdout?.setEncoding('utf8');
-		cp.stdout?.on('data', (data) => {
+		cp.stdout?.on('data', data => {
 			console.log(data);
 		});
 		cp.stderr?.setEncoding('utf8');
-		cp.stderr?.on('data', (data) => {
+		cp.stderr?.on('data', data => {
 			console.error(data);
 		});
 
-		cp.on('exit', (code) => {
+		cp.on('exit', code => {
 			if (code === 0) {
 				resolve(undefined);
 			} else {