diff --git a/src/app/auth/auth.component.html b/src/app/auth/auth.component.html
index 44840fb1..5e29c4d0 100644
--- a/src/app/auth/auth.component.html
+++ b/src/app/auth/auth.component.html
@@ -54,7 +54,7 @@
         </mat-form-field>
 
         <grid-buttons>
-          <button-submit [name]="'Login'"></button-submit>
+          <button-submit [name]="'Login'" data-testid="submit-button"></button-submit>
           <div *ngIf="isLoading">
             <mat-spinner diameter="24" color="accent"></mat-spinner>
           </div>
diff --git a/src/app/auth/auth.component.spec.ts b/src/app/auth/auth.component.spec.ts
new file mode 100644
index 00000000..5fb22ff6
--- /dev/null
+++ b/src/app/auth/auth.component.spec.ts
@@ -0,0 +1,119 @@
+import { asyncScheduler, observeOn, of, throwError } from 'rxjs';
+
+import { ComponentFixture, TestBed, fakeAsync, tick } from '@angular/core/testing';
+import { ReactiveFormsModule } from '@angular/forms';
+import { MatButtonModule } from '@angular/material/button';
+import { MatCardModule } from '@angular/material/card';
+import { MatFormFieldModule } from '@angular/material/form-field';
+import { MatIconModule } from '@angular/material/icon';
+import { MatInputModule } from '@angular/material/input';
+import { MatProgressSpinnerModule } from '@angular/material/progress-spinner';
+import { By } from '@angular/platform-browser';
+
+import { AuthService } from '@services/access/auth.service';
+import { AlertService } from '@services/shared/alert.service';
+import { ConfigService } from '@services/shared/config.service';
+import { UnsubscribeService } from '@services/unsubscribe.service';
+
+import { AuthComponent } from '@src/app/auth/auth.component';
+import { ButtonsModule } from '@src/app/shared/buttons/buttons.module';
+import { ComponentsModule } from '@src/app/shared/components.module';
+import { InputModule } from '@src/app/shared/input/input.module';
+
+describe('AuthComponent', () => {
+  let component: AuthComponent;
+  let fixture: ComponentFixture<AuthComponent>;
+
+  // Mocks
+  let mockAuthService: jasmine.SpyObj<AuthService>;
+  let mockAlertService: jasmine.SpyObj<AlertService>;
+  let mockUnsubscribeService: jasmine.SpyObj<UnsubscribeService>;
+  let mockConfigService: jasmine.SpyObj<ConfigService>;
+
+  beforeEach(async () => {
+    mockAuthService = jasmine.createSpyObj('AuthService', ['logIn']);
+    mockAlertService = jasmine.createSpyObj('AlertService', ['showErrorMessage']);
+    mockUnsubscribeService = jasmine.createSpyObj('UnsubscribeService', ['add', 'unsubscribeAll']);
+    mockConfigService = jasmine.createSpyObj('ConfigService', ['getEndpoint']);
+
+    await TestBed.configureTestingModule({
+      imports: [
+        ReactiveFormsModule,
+        MatCardModule,
+        MatFormFieldModule,
+        MatInputModule,
+        MatIconModule,
+        MatButtonModule,
+        InputModule,
+        ButtonsModule,
+        ComponentsModule,
+        MatProgressSpinnerModule
+      ],
+      declarations: [AuthComponent],
+      providers: [
+        { provide: AuthService, useValue: mockAuthService },
+        { provide: AlertService, useValue: mockAlertService },
+        { provide: UnsubscribeService, useValue: mockUnsubscribeService },
+        { provide: ConfigService, useValue: mockConfigService }
+      ]
+    }).compileComponents();
+
+    fixture = TestBed.createComponent(AuthComponent);
+    component = fixture.componentInstance;
+    fixture.detectChanges();
+  });
+
+  it('should create the component and initialize form', () => {
+    expect(component).toBeTruthy();
+    expect(component.loginForm).toBeTruthy();
+    expect(component.loginForm.controls['username']).toBeTruthy();
+    expect(component.loginForm.controls['password']).toBeTruthy();
+  });
+
+  it('should mark form invalid if empty', () => {
+    component.loginForm.setValue({ username: '', password: '' });
+    expect(component.loginForm.invalid).toBeTrue();
+  });
+
+  it('should call authService.logIn on valid form submission via button click', fakeAsync(() => {
+    const fakeResponse = of({ token: '123' }).pipe(observeOn(asyncScheduler));
+    mockAuthService.logIn.and.returnValue(fakeResponse);
+    component.loginForm.setValue({ username: 'user', password: 'pass' });
+
+    const submitButtonDebugEl = fixture.debugElement.query(By.css('button-submit button'));
+    submitButtonDebugEl.nativeElement.click();
+
+    expect(component.isLoading).toBeTrue();
+    expect(mockAuthService.logIn).toHaveBeenCalledWith('user', 'pass');
+
+    tick();
+
+    expect(component.isLoading).toBeFalse();
+    expect(component.loginForm.value.username).toBeNull();
+    expect(component.loginForm.value.password).toBeNull();
+    expect(mockUnsubscribeService.add).toHaveBeenCalled();
+  }));
+
+  it('should show error message when login fails on submit button click', fakeAsync(() => {
+    const errorResponse = throwError(() => new Error('Login failed')).pipe(observeOn(asyncScheduler));
+    mockAuthService.logIn.and.returnValue(errorResponse);
+
+    component.loginForm.setValue({ username: 'user', password: 'wrong' });
+
+    const submitButtonDebugEl = fixture.debugElement.query(By.css('button-submit button'));
+    submitButtonDebugEl.nativeElement.click();
+
+    expect(component.isLoading).toBeTrue();
+    expect(mockAuthService.logIn).toHaveBeenCalledWith('user', 'wrong');
+
+    tick();
+
+    expect(component.isLoading).toBeFalse();
+    expect(mockAlertService.showErrorMessage).toHaveBeenCalled();
+  }));
+
+  it('should call unsubscribeAll on destroy', () => {
+    component.ngOnDestroy();
+    expect(mockUnsubscribeService.unsubscribeAll).toHaveBeenCalled();
+  });
+});
diff --git a/src/app/auth/auth.component.ts b/src/app/auth/auth.component.ts
index 3f80d692..028d6129 100644
--- a/src/app/auth/auth.component.ts
+++ b/src/app/auth/auth.component.ts
@@ -15,8 +15,8 @@ import { LocalStorageService } from '@services/storage/local-storage.service';
 import { UnsubscribeService } from '@services/unsubscribe.service';
 
 import { UISettingsUtilityClass } from '@src/app/shared/utils/config';
-import { environment } from '@src/environments/environment';
 import { HeaderConfig } from '@src/config/default/app/config.model';
+import { environment } from '@src/environments/environment';
 
 @Component({
   selector: 'app-login',