diff --git a/lib/middleware/onerror.js b/lib/middleware/onerror.js
index a29f59b7a74433..3a966029521906 100644
--- a/lib/middleware/onerror.js
+++ b/lib/middleware/onerror.js
@@ -39,9 +39,13 @@ module.exports = async (ctx, next) => {
             });
         }
     } catch (err) {
-        // Append v2 route path
-        ctx.request.path = (ctx.mountPath ?? '') + ctx.request.path;
-        ctx._matchedRoute = ctx._matchedRoute ? (ctx.mountPath ?? '') + ctx._matchedRoute : ctx.request.path;
+        if (err instanceof Error && !err.stack.split('\n')[1].includes('lib/middleware/parameter.js')) {
+            // Append v2 route path if a route throws an error
+            // since koa-mount will remove the mount path from ctx.request.path
+            // https://github.com/koajs/mount/issues/62
+            ctx.request.path = (ctx.mountPath ?? '') + ctx.request.path;
+            ctx._matchedRoute = ctx._matchedRoute ? (ctx.mountPath ?? '') + ctx._matchedRoute : ctx._matchedRoute;
+        }
 
         let message = err;
         if (err.name && (err.name === 'HTTPError' || err.name === 'RequestError')) {
diff --git a/test/middleware/onerror.js b/test/middleware/onerror.js
index f2ca6004807d40..e92fcea13a31bb 100644
--- a/test/middleware/onerror.js
+++ b/test/middleware/onerror.js
@@ -59,13 +59,13 @@ describe('v2 route throws an error', () => {
                     expect(value).toBe('7');
                     break;
                 case 'Hot Routes:':
-                    expect(value).toBe('4  /test/:id<br>1  /test/slow<br>1  /thisDoesNotExist<br>');
+                    expect(value).toBe('4  /test/:id<br>');
                     break;
                 case 'Hot Paths:':
                     expect(value).toBe('2  /test/error<br>2  /test/slow<br>1  /test/httperror<br>1  /thisDoesNotExist<br>1  /<br>');
                     break;
                 case 'Hot Error Routes:':
-                    expect(value).toBe('3  /test/:id<br>1  /test/slow<br>1  /thisDoesNotExist<br>');
+                    expect(value).toBe('3  /test/:id<br>');
                     break;
                 case 'Hot Error Paths:':
                     expect(value).toBe('2  /test/error<br>1  /test/httperror<br>1  /test/slow<br>1  /thisDoesNotExist<br>');
diff --git a/test/utils/rand-user-agent.js b/test/utils/rand-user-agent.js
index 01b2cc5b90be40..d8a44301f821a6 100644
--- a/test/utils/rand-user-agent.js
+++ b/test/utils/rand-user-agent.js
@@ -33,15 +33,17 @@ describe('rand-user-agent', () => {
     });
 
     it('should match ua configurated', async () => {
-        const response1 = await got('https://httpbingo.org/user-agent');
-        expect(response1.data['user-agent']).toBe(config.ua);
+        nock('https://rsshub.test')
+            .get('/test')
+            .reply(function () {
+                return [200, { ua: this.req.headers['user-agent'] }];
+            });
 
-        const response2 = await got('https://httpbingo.org/user-agent', {
+        const resonse = await got('https://rsshub.test/test', {
             headers: {
                 'user-agent': mobileUa,
             },
         });
-        expect(response2.data['user-agent']).toBe(mobileUa);
-        expect(response2.data['user-agent']).not.toBe(config.ua);
+        expect(resonse.data.ua).toBe(mobileUa);
     });
 });