diff --git a/npm/ng-packs/packages/core/src/lib/services/rest.service.ts b/npm/ng-packs/packages/core/src/lib/services/rest.service.ts
index e3c99bac2c..4057a4a29a 100644
--- a/npm/ng-packs/packages/core/src/lib/services/rest.service.ts
+++ b/npm/ng-packs/packages/core/src/lib/services/rest.service.ts
@@ -19,7 +19,8 @@ export class RestService {
     return throwError(err);
   }
 
-  request<T, R>(request: HttpRequest<T> | Rest.Request<T>, config: Rest.Config = {}, api?: string): Observable<R> {
+  request<T, R>(request: HttpRequest<T> | Rest.Request<T>, config?: Rest.Config, api?: string): Observable<R> {
+    config = config || ({} as Rest.Config);
     const { observe = Rest.Observe.Body, skipHandleError } = config;
     const url = (api || this.store.selectSnapshot(ConfigState.getApiUrl())) + request.url;
     const { method, ...options } = request;
diff --git a/npm/ng-packs/packages/core/src/lib/tests/rest.service.spec.ts b/npm/ng-packs/packages/core/src/lib/tests/rest.service.spec.ts
index f91fbcef3e..6a06ec2c12 100644
--- a/npm/ng-packs/packages/core/src/lib/tests/rest.service.spec.ts
+++ b/npm/ng-packs/packages/core/src/lib/tests/rest.service.spec.ts
@@ -1,6 +1,10 @@
 import { createHttpFactory, HttpMethod, SpectatorHttp, SpyObject } from '@ngneat/spectator/jest';
-import { RestService } from '../services/rest.service';
 import { Store } from '@ngxs/store';
+import { Subscription, timer, interval, throwError, of } from 'rxjs';
+import { mapTo, catchError } from 'rxjs/operators';
+import { RestService } from '../services/rest.service';
+import { Rest } from '../models';
+import { RestOccurError } from '../actions';
 
 describe('HttpClient testing', () => {
   let spectator: SpectatorHttp<RestService>;
@@ -19,4 +23,73 @@ describe('HttpClient testing', () => {
     spectator.service.request({ method: HttpMethod.GET, url: '/test', params: { id: 1 } }).subscribe();
     spectator.expectOne(api + '/test?id=1', HttpMethod.GET);
   });
+
+  test('should send a POST request with body', () => {
+    spectator.service.request({ method: HttpMethod.POST, url: '/test', body: { id: 1 } }).subscribe();
+    const req = spectator.expectOne(api + '/test', HttpMethod.POST);
+    expect(req.request.body['id']).toEqual(1);
+  });
+
+  test('should use the specific api', () => {
+    spectator.service.request({ method: HttpMethod.GET, url: '/test' }, null, 'http://test.api').subscribe();
+    spectator.expectOne('http://test.api' + '/test', HttpMethod.GET);
+  });
+
+  test('should close the subscriber when observe equal to body', done => {
+    jest.spyOn(spectator.httpClient, 'request').mockReturnValue(interval(50));
+
+    const subscriber: Subscription = spectator.service
+      .request({ method: HttpMethod.GET, url: '/test' }, { observe: Rest.Observe.Body })
+      .subscribe();
+
+    timer(51).subscribe(() => {
+      expect(subscriber.closed).toBe(true);
+      done();
+    });
+  });
+
+  test('should open the subscriber when observe not equal to body', done => {
+    jest.spyOn(spectator.httpClient, 'request').mockReturnValue(interval(50));
+
+    const subscriber: Subscription = spectator.service
+      .request({ method: HttpMethod.GET, url: '/test' }, { observe: Rest.Observe.Events })
+      .subscribe();
+
+    timer(51).subscribe(() => {
+      expect(subscriber.closed).toBe(false);
+      done();
+    });
+  });
+
+  test('should handle the error', () => {
+    jest.spyOn(spectator.httpClient, 'request').mockReturnValue(throwError('An error'));
+    const spy = jest.spyOn(store, 'dispatch');
+
+    spectator.service
+      .request({ method: HttpMethod.GET, url: '/test' }, { observe: Rest.Observe.Events })
+      .pipe(
+        catchError(err => {
+          expect(err).toBeTruthy();
+          expect(spy.mock.calls[0][0] instanceof RestOccurError).toBe(true);
+          return of(null);
+        }),
+      )
+      .subscribe();
+  });
+
+  test('should not handle the error when skipHandleError is true', () => {
+    jest.spyOn(spectator.httpClient, 'request').mockReturnValue(throwError('An error'));
+    const spy = jest.spyOn(store, 'dispatch');
+
+    spectator.service
+      .request({ method: HttpMethod.GET, url: '/test' }, { observe: Rest.Observe.Events, skipHandleError: true })
+      .pipe(
+        catchError(err => {
+          expect(err).toBeTruthy();
+          expect(spy.mock.calls).toHaveLength(0);
+          return of(null);
+        }),
+      )
+      .subscribe();
+  });
 });