diff --git a/lib/hexo/validate_config.ts b/lib/hexo/validate_config.ts
index c7ca6477bd..52cd6ab5e3 100644
--- a/lib/hexo/validate_config.ts
+++ b/lib/hexo/validate_config.ts
@@ -12,6 +12,8 @@ export = (ctx: Hexo): void => {
   try {
     // eslint-disable-next-line no-new
     new URL(config.url);
+    // eslint-disable-next-line no-new
+    new URL('source/_post/xxx', config.url);
   } catch {
     throw new TypeError('Invalid config detected: "url" should be a valid URL!');
   }
diff --git a/test/scripts/hexo/validate_config.ts b/test/scripts/hexo/validate_config.ts
index c414c2a68d..f64d43a22a 100644
--- a/test/scripts/hexo/validate_config.ts
+++ b/test/scripts/hexo/validate_config.ts
@@ -54,6 +54,20 @@ describe('Validate config', () => {
     }
   });
 
+
+  it('config.url - not start with xx://', () => {
+    // @ts-ignore
+    hexo.config.url = 'localhost:4000';
+
+    try {
+      validateConfig(hexo);
+      should.fail();
+    } catch (e) {
+      e.name.should.eql('TypeError');
+      e.message.should.eql('Invalid config detected: "url" should be a valid URL!');
+    }
+  });
+
   // #4510
   it('config.url - slash', () => {
     hexo.config.url = '/';