diff --git a/test/dir-list.test.js b/test/dir-list.test.js
index 5c4da834..a6af123f 100644
--- a/test/dir-list.test.js
+++ b/test/dir-list.test.js
@@ -23,7 +23,7 @@ const helper = {
 
 try {
   fs.mkdirSync(path.join(__dirname, 'static/shallow/empty'))
-} catch (error) {}
+} catch {}
 
 test('throws when `root` is an array', t => {
   t.plan(2)
@@ -249,7 +249,7 @@ test('dir list href nested structure', async t => {
     list: {
       format: 'html',
       names: ['index', 'index.htm'],
-      render (dirs, files) {
+      render (dirs) {
         return dirs[0].href
       }
     }
@@ -298,8 +298,7 @@ test('dir list html format - stats', async t => {
         t.assert.ok(files.every(every))
 
         function every (value) {
-          return value.stats &&
-            value.stats.atime &&
+          return value.stats?.atime &&
             !value.extendedInfo
         }
       }
@@ -327,7 +326,7 @@ test('dir list html format - extended info', async t => {
     list: {
       format: 'html',
       extendedFolderInfo: true,
-      render (dirs, files) {
+      render (dirs) {
         test('dirs', t => {
           t.plan(dirs.length * 7)
 
@@ -425,7 +424,7 @@ test('json format with url parameter format', async t => {
     index: false,
     list: {
       format: 'json',
-      render (dirs, files) {
+      render () {
         return 'html'
       }
     }
@@ -497,7 +496,7 @@ test('html format with url parameter format', async t => {
     index: false,
     list: {
       format: 'html',
-      render (dirs, files) {
+      render () {
         return 'html'
       }
     }
@@ -718,12 +717,12 @@ test('dir list error', async t => {
   dirList.send = async () => { throw new Error(errorMessage) }
 
   t.beforeEach((ctx) => {
-    ctx['initialDirList'] = ctx['../lib/dirList.js']
+    ctx.initialDirList = ctx['../lib/dirList.js']
     ctx['../lib/dirList.js'] = dirList
   })
 
   t.afterEach((ctx) => {
-    ctx['../lib/dirList.js'] = ctx['initialDirList']
+    ctx['../lib/dirList.js'] = ctx.initialDirList
   })
 
   const routes = ['/public/', '/public/index.htm']
diff --git a/test/static.test.js b/test/static.test.js
index 2e6a7254..a425abc8 100644
--- a/test/static.test.js
+++ b/test/static.test.js
@@ -462,11 +462,11 @@ test('register /static and /static2', async (t) => {
   const fastify = Fastify()
   fastify.register(fastifyStatic, pluginOptions)
 
-  fastify.get('/foo', (req, rep) => {
+  fastify.get('/foo', (_req, rep) => {
     rep.sendFile('foo.html')
   })
 
-  fastify.get('/bar', (req, rep) => {
+  fastify.get('/bar', (_req, rep) => {
     rep.sendFile('bar.html')
   })
 
@@ -575,7 +575,7 @@ test('payload.path is set', async (t) => {
   const fastify = Fastify()
   let gotFilename
   fastify.register(fastifyStatic, pluginOptions)
-  fastify.addHook('onSend', function (req, reply, payload, next) {
+  fastify.addHook('onSend', function (_req, _reply, payload, next) {
     gotFilename = payload.path
     next()
   })
@@ -617,7 +617,7 @@ test('error responses can be customized with fastify.setErrorHandler()', async t
   }
   const fastify = Fastify()
 
-  fastify.setErrorHandler(function errorHandler (err, request, reply) {
+  fastify.setErrorHandler(function errorHandler (err, _request, reply) {
     reply.code(403).type('text/plain').send(`${err.statusCode} Custom error message`)
   })
 
@@ -724,7 +724,7 @@ test('serving disabled', async (t) => {
 
   t.after(() => fastify.close())
 
-  fastify.get('/foo/bar', (request, reply) => {
+  fastify.get('/foo/bar', (_request, reply) => {
     reply.sendFile('index.html')
   })
 
@@ -766,18 +766,18 @@ test('sendFile', async (t) => {
 
   t.after(() => fastify.close())
 
-  fastify.get('/foo/bar', function (req, reply) {
+  fastify.get('/foo/bar', function (_req, reply) {
     reply.sendFile('/index.html')
   })
 
-  fastify.get('/root/path/override/test', (request, reply) => {
+  fastify.get('/root/path/override/test', (_request, reply) => {
     reply.sendFile(
       '/foo.html',
       path.join(__dirname, 'static', 'deep', 'path', 'for', 'test', 'purpose')
     )
   })
 
-  fastify.get('/foo/bar/options/override/test', function (req, reply) {
+  fastify.get('/foo/bar/options/override/test', function (_req, reply) {
     reply.sendFile('/index.html', { maxAge })
   })
 
@@ -838,7 +838,7 @@ test('sendFile disabled', async (t) => {
 
   t.after(() => fastify.close())
 
-  fastify.get('/foo/bar', function (req, reply) {
+  fastify.get('/foo/bar', function (_req, reply) {
     if (reply.sendFile === undefined) {
       reply.send('pass')
     } else {
@@ -898,7 +898,7 @@ test('allowedPath option - request', async (t) => {
 
   const pluginOptions = {
     root: path.join(__dirname, '/static'),
-    allowedPath: (pathName, root, request) => request.query.key === 'temporaryKey'
+    allowedPath: (_pathName, _root, request) => request.query.key === 'temporaryKey'
   }
   const fastify = Fastify()
   fastify.register(fastifyStatic, pluginOptions)
@@ -939,26 +939,26 @@ test('download', async (t) => {
 
   t.after(() => fastify.close())
 
-  fastify.get('/foo/bar', function (req, reply) {
+  fastify.get('/foo/bar', function (_req, reply) {
     reply.download('/index.html')
   })
 
-  fastify.get('/foo/bar/change', function (req, reply) {
+  fastify.get('/foo/bar/change', function (_req, reply) {
     reply.download('/index.html', 'hello-world.html')
   })
 
-  fastify.get('/foo/bar/override', function (req, reply) {
+  fastify.get('/foo/bar/override', function (_req, reply) {
     reply.download('/index.html', 'hello-world.html', {
       maxAge: '2 hours',
       immutable: true
     })
   })
 
-  fastify.get('/foo/bar/override/2', function (req, reply) {
+  fastify.get('/foo/bar/override/2', function (_req, reply) {
     reply.download('/index.html', { acceptRanges: false })
   })
 
-  fastify.get('/root/path/override/test', (request, reply) => {
+  fastify.get('/root/path/override/test', (_request, reply) => {
     reply.download('/foo.html', {
       root: path.join(
         __dirname,
@@ -972,7 +972,7 @@ test('download', async (t) => {
     })
   })
 
-  fastify.get('/root/path/override/test/change', (request, reply) => {
+  fastify.get('/root/path/override/test/change', (_request, reply) => {
     reply.download('/foo.html', 'hello-world.html', {
       root: path.join(
         __dirname,
@@ -1070,7 +1070,7 @@ test('download disabled', async (t) => {
   const fastify = Fastify()
   fastify.register(fastifyStatic, pluginOptions)
 
-  fastify.get('/foo/bar', function (req, reply) {
+  fastify.get('/foo/bar', function (_req, reply) {
     if (reply.download === undefined) {
       t.assert.deepStrictEqual(reply.download, undefined)
       reply.send('pass')
@@ -1141,7 +1141,7 @@ test('send options', (t) => {
   const fastify = Fastify({ logger: false })
   const { resolve, promise } = Promise.withResolvers()
   const fastifyStatic = require('proxyquire')('../', {
-    '@fastify/send': function sendStub (req, pathName, options) {
+    '@fastify/send': function sendStub (_req, pathName, options) {
       t.assert.deepStrictEqual(pathName, '/index.html')
       t.assert.deepStrictEqual(options.root, path.join(__dirname, '/static'))
       t.assert.deepStrictEqual(options.acceptRanges, 'acceptRanges')
@@ -1306,7 +1306,7 @@ test('register no prefix', async (t) => {
   const fastify = Fastify()
   fastify.register(fastifyStatic, pluginOptions)
 
-  fastify.get('/', (request, reply) => {
+  fastify.get('/', (_request, reply) => {
     reply.send({ hello: 'world' })
   })
 
@@ -1559,7 +1559,7 @@ test('register with wildcard false', async t => {
   const fastify = Fastify()
   fastify.register(fastifyStatic, pluginOptions)
 
-  fastify.get('/*', (request, reply) => {
+  fastify.get('/*', (_request, reply) => {
     reply.send({ hello: 'world' })
   })
 
@@ -1661,7 +1661,7 @@ test('register with wildcard false (trailing slash in the root)', async t => {
   })
   fastify.register(fastifyStatic, pluginOptions)
 
-  fastify.get('/*', (request, reply) => {
+  fastify.get('/*', (_request, reply) => {
     reply.send({ hello: 'world' })
   })
 
@@ -1729,7 +1729,7 @@ test('register with wildcard string', async (t) => {
   const fastify = Fastify()
   fastify.register(fastifyStatic, pluginOptions)
 
-  fastify.get('/*', (request, reply) => {
+  fastify.get('/*', (_request, reply) => {
     reply.send({ hello: 'world' })
   })
 
@@ -1746,7 +1746,7 @@ test('register with wildcard string on multiple root paths', async (t) => {
   const fastify = Fastify()
   fastify.register(fastifyStatic, pluginOptions)
 
-  fastify.get('/*', (request, reply) => {
+  fastify.get('/*', (_request, reply) => {
     reply.send({ hello: 'world' })
   })
 
@@ -1766,7 +1766,7 @@ test('register with wildcard false and alternative index', async t => {
   const fastify = Fastify()
   fastify.register(fastifyStatic, pluginOptions)
 
-  fastify.get('/*', (request, reply) => {
+  fastify.get('/*', (_request, reply) => {
     reply.send({ hello: 'world' })
   })
 
@@ -1890,7 +1890,7 @@ test('register /static with wildcard false and alternative index', async t => {
   const fastify = Fastify()
   fastify.register(fastifyStatic, pluginOptions)
 
-  fastify.get('/*', (request, reply) => {
+  fastify.get('/*', (_request, reply) => {
     reply.send({ hello: 'world' })
   })
 
@@ -2389,7 +2389,7 @@ test('if dotfiles are properly served according to plugin options', async (t) =>
 
 test('register with failing glob handler', async (t) => {
   const fastifyStatic = proxyquire.noCallThru()('../', {
-    glob: function globStub (pattern, options, cb) {
+    glob: function globStub (_pattern, _options, cb) {
       process.nextTick(function () {
         return cb(new Error('mock glob error'))
       })
@@ -2414,7 +2414,7 @@ test(
   async (t) => {
     const fastifyStatic = proxyquire('../', {
       'node:fs': {
-        statSync: function statSyncStub (path) {
+        statSync: function statSyncStub () {
           throw new Error({ code: 'MOCK' })
         }
       }
@@ -2463,7 +2463,7 @@ test('routes should use custom errorHandler premature stream close', async t =>
   fastify.addHook('onRoute', function (routeOptions) {
     t.assert.ok(routeOptions.errorHandler instanceof Function)
 
-    routeOptions.onRequest = (request, reply, done) => {
+    routeOptions.onRequest = (_request, _reply, done) => {
       const fakeError = new Error()
       fakeError.code = 'ERR_STREAM_PREMATURE_CLOSE'
       done(fakeError)
@@ -2489,7 +2489,7 @@ test('routes should fallback to default errorHandler', async t => {
   fastify.addHook('onRoute', function (routeOptions) {
     t.assert.ok(routeOptions.errorHandler instanceof Function)
 
-    routeOptions.preHandler = (request, reply, done) => {
+    routeOptions.preHandler = (_request, _reply, done) => {
       const fakeError = new Error()
       fakeError.code = 'SOMETHING_ELSE'
       done(fakeError)
diff --git a/types/index.test-d.ts b/types/index.test-d.ts
index b91705da..f762b73d 100644
--- a/types/index.test-d.ts
+++ b/types/index.test-d.ts
@@ -62,7 +62,7 @@ const options: FastifyStaticOptions = {
     expectType<Stats>(stat)
   },
   preCompressed: false,
-  allowedPath: (pathName: string, root: string, request: FastifyRequest) => {
+  allowedPath: (_pathName: string, _root: string, _request: FastifyRequest) => {
     return true
   },
   constraints: {
@@ -121,7 +121,7 @@ expectAssignable<FastifyStaticOptions>({
 appWithImplicitHttp
   .register(fastifyStatic, options)
   .after(() => {
-    appWithImplicitHttp.get('/', (request, reply) => {
+    appWithImplicitHttp.get('/', (_request, reply) => {
       reply.sendFile('some-file-name')
     })
   })
@@ -131,23 +131,23 @@ const appWithHttp2 = fastify({ http2: true })
 appWithHttp2
   .register(fastifyStatic, options)
   .after(() => {
-    appWithHttp2.get('/', (request, reply) => {
+    appWithHttp2.get('/', (_request, reply) => {
       reply.sendFile('some-file-name')
     })
 
-    appWithHttp2.get('/download', (request, reply) => {
+    appWithHttp2.get('/download', (_request, reply) => {
       reply.download('some-file-name')
     })
 
-    appWithHttp2.get('/download/1', (request, reply) => {
+    appWithHttp2.get('/download/1', (_request, reply) => {
       reply.download('some-file-name', { maxAge: '2 days' })
     })
 
-    appWithHttp2.get('/download/2', (request, reply) => {
+    appWithHttp2.get('/download/2', (_request, reply) => {
       reply.download('some-file-name', 'some-filename', { cacheControl: false, acceptRanges: true })
     })
 
-    appWithHttp2.get('/download/3', (request, reply) => {
+    appWithHttp2.get('/download/3', (_request, reply) => {
       reply.download('some-file-name', 'some-filename', { contentType: false })
     })
   })
@@ -158,35 +158,35 @@ options.root = ['']
 multiRootAppWithImplicitHttp
   .register(fastifyStatic, options)
   .after(() => {
-    multiRootAppWithImplicitHttp.get('/', (request, reply) => {
+    multiRootAppWithImplicitHttp.get('/', (_request, reply) => {
       reply.sendFile('some-file-name')
     })
 
-    multiRootAppWithImplicitHttp.get('/', (request, reply) => {
+    multiRootAppWithImplicitHttp.get('/', (_request, reply) => {
       reply.sendFile('some-file-name', { cacheControl: false, acceptRanges: true })
     })
 
-    multiRootAppWithImplicitHttp.get('/', (request, reply) => {
+    multiRootAppWithImplicitHttp.get('/', (_request, reply) => {
       reply.sendFile('some-file-name', 'some-root-name', { cacheControl: false, acceptRanges: true })
     })
 
-    multiRootAppWithImplicitHttp.get('/', (request, reply) => {
+    multiRootAppWithImplicitHttp.get('/', (_request, reply) => {
       reply.sendFile('some-file-name', 'some-root-name-2', { contentType: false })
     })
 
-    multiRootAppWithImplicitHttp.get('/download', (request, reply) => {
+    multiRootAppWithImplicitHttp.get('/download', (_request, reply) => {
       reply.download('some-file-name')
     })
 
-    multiRootAppWithImplicitHttp.get('/download/1', (request, reply) => {
+    multiRootAppWithImplicitHttp.get('/download/1', (_request, reply) => {
       reply.download('some-file-name', { maxAge: '2 days' })
     })
 
-    multiRootAppWithImplicitHttp.get('/download/2', (request, reply) => {
+    multiRootAppWithImplicitHttp.get('/download/2', (_request, reply) => {
       reply.download('some-file-name', 'some-filename', { cacheControl: false, acceptRanges: true })
     })
 
-    multiRootAppWithImplicitHttp.get('/download/3', (request, reply) => {
+    multiRootAppWithImplicitHttp.get('/download/3', (_request, reply) => {
       reply.download('some-file-name', 'some-filename', { contentType: false })
     })
   })
@@ -198,7 +198,7 @@ options.index = false
 noIndexApp
   .register(fastifyStatic, options)
   .after(() => {
-    noIndexApp.get('/', (request, reply) => {
+    noIndexApp.get('/', (_request, reply) => {
       reply.send('<h1>fastify-static</h1>')
     })
   })
@@ -208,7 +208,7 @@ options.root = new URL('')
 const URLRootApp = fastify()
 URLRootApp.register(fastifyStatic, options)
   .after(() => {
-    URLRootApp.get('/', (request, reply) => {
+    URLRootApp.get('/', (_request, reply) => {
       reply.send('<h1>fastify-static</h1>')
     })
   })
@@ -219,7 +219,7 @@ options.index = 'index.html'
 defaultIndexApp
   .register(fastifyStatic, options)
   .after(() => {
-    defaultIndexApp.get('/', (request, reply) => {
+    defaultIndexApp.get('/', (_request, reply) => {
       reply.send('<h1>fastify-static</h1>')
     })
   })