diff --git a/spec/common/misc/utils.spec.ts b/spec/common/misc/utils.spec.ts
index 13bebb31..00c0f681 100644
--- a/spec/common/misc/utils.spec.ts
+++ b/spec/common/misc/utils.spec.ts
@@ -58,7 +58,12 @@ describe('Utils Service', () => {
             expect(Utils.getDomain('localhost')).toBe('localhost');
             expect(Utils.getDomain('http://localhost')).toBe('localhost');
             expect(Utils.getDomain('https://localhost')).toBe('localhost');
+        });
 
+        it('should support localhost with subdomain', () => {
+            expect(Utils.getDomain('subdomain.localhost')).toBe('localhost');
+            expect(Utils.getDomain('http://subdomain.localhost')).toBe('localhost');
+            expect(Utils.getDomain('https://subdomain.localhost')).toBe('localhost');
         });
 
         it('should support IPv4', () => {
@@ -127,6 +132,12 @@ describe('Utils Service', () => {
             expect(Utils.getHostname('https://localhost')).toBe('localhost');
         });
 
+        it('should support localhost with subdomain', () => {
+            expect(Utils.getHostname('subdomain.localhost')).toBe('subdomain.localhost');
+            expect(Utils.getHostname('http://subdomain.localhost')).toBe('subdomain.localhost');
+            expect(Utils.getHostname('https://subdomain.localhost')).toBe('subdomain.localhost');
+        });
+
         it('should support IPv4', () => {
             expect(Utils.getHostname('192.168.1.1')).toBe('192.168.1.1');
             expect(Utils.getHostname('http://192.168.1.1')).toBe('192.168.1.1');