diff --git a/tests/core/app.test.ts b/tests/core/app.test.ts
index dd7fffe1..d7a2d230 100644
--- a/tests/core/app.test.ts
+++ b/tests/core/app.test.ts
@@ -162,6 +162,13 @@ describe('Testing App routing', () => {
 
     await makeFetch(app.listen())('/abc').expect(200, 'Hello World')
   })
+  it('should ignore a non-string, non-array base path and mount at root', async () => {
+    const app = new App()
+
+    app.use(123 as unknown as string, (_req, res) => void res.send('Hello world'))
+
+    await makeFetch(app.listen())('/').expect(200, 'Hello world')
+  })
   it('should can set url prefix for the application', async () => {
     const app = new App()
 
diff --git a/tests/core/request.test.ts b/tests/core/request.test.ts
index 04d5f5ef..df564acd 100644
--- a/tests/core/request.test.ts
+++ b/tests/core/request.test.ts
@@ -794,4 +794,11 @@ describe('Request properties', () => {
 
     await fetch('/', { headers: { 'If-None-Match': etag, 'Cache-Control': 'max-age=3600' } }).expectStatus(304)
   })
+  it('req.stale is true when the response is not fresh', async () => {
+    const { fetch } = InitAppAndTest((req, res) => {
+      res.send(`stale: ${req.stale}`)
+    })
+
+    await fetch('/').expect(200, 'stale: true')
+  })
 })
diff --git a/tests/modules/negotiator.test.ts b/tests/modules/negotiator.test.ts
index 66d7b556..9a4ff436 100644
--- a/tests/modules/negotiator.test.ts
+++ b/tests/modules/negotiator.test.ts
@@ -282,6 +282,16 @@ describe('Negotiator', () => {
       const negotiator = new Negotiator(createRequest({ accept: 'text/html;level' }))
       expect(negotiator.mediaTypes()).toEqual(['text/html'])
     })
+
+    it('should match when accept parameter has an empty value', () => {
+      const negotiator = new Negotiator(createRequest({ accept: 'text/html;level=' }))
+      expect(negotiator.mediaTypes(['text/html;level='])).toEqual(['text/html;level='])
+    })
+
+    it('should not match when accept parameter has an empty value but provided does not', () => {
+      const negotiator = new Negotiator(createRequest({ accept: 'text/html;level=' }))
+      expect(negotiator.mediaTypes(['text/html;level=1'])).toEqual([])
+    })
   })
 
   describe('edge cases', () => {