diff --git a/frontend/src/app/component/landing/landing.component.ts b/frontend/src/app/component/landing/landing.component.ts
index d7c91f2..9261559 100644
--- a/frontend/src/app/component/landing/landing.component.ts
+++ b/frontend/src/app/component/landing/landing.component.ts
@@ -1,9 +1,8 @@
-import {Component, OnInit, ViewChild} from '@angular/core';
+import {Component, OnInit} from '@angular/core';
 import {RestService} from '../../services/rest.service';
 import {WebsocketService} from '../../services/websocket.service';
 import {NGXLogger} from 'ngx-logger';
 import {Subscription} from 'rxjs';
-import {TestSubCompComponent} from "../testsubcomp/test-sub-comp.component";
 
 @Component({
   selector: 'app-landing',
@@ -42,7 +41,7 @@ export class LandingComponent implements OnInit {
 
   private observableCall(): void {
 
-    const subscription = this.restService.testCall().subscribe(
+    const subscription = this.restService.testCall(1).subscribe(
       // subscribe with lambda function
       response => {
         this.logger.debug('Execute obs test call', response);
@@ -56,7 +55,7 @@ export class LandingComponent implements OnInit {
   }
 
   private promiseCall(): void {
-    this.restService.testCall().toPromise()
+    this.restService.testCall(2).toPromise()
       // lambda for success
       .then(response => {
         this.logger.debug('Execute obs test call', response);
diff --git a/frontend/src/app/services/rest.service.ts b/frontend/src/app/services/rest.service.ts
index eabf882..191381d 100644
--- a/frontend/src/app/services/rest.service.ts
+++ b/frontend/src/app/services/rest.service.ts
@@ -1,4 +1,4 @@
-import {HttpClient, HttpResponse} from '@angular/common/http';
+import {HttpClient} from '@angular/common/http';
 import {Injectable} from '@angular/core';
 import {NGXLogger} from 'ngx-logger';
 import {environment} from '../../environments/environment';
@@ -14,9 +14,9 @@ export class RestService {
   ) {
   }
 
-  testCall(): Observable<string> {
+  testCall(i: number): Observable<string> {
     const url = this.currentLocation + 'test/';
-    this.logger.debug('Performing test rest call on', url);
+    this.logger.debug('Performing ' + i + '. test rest call on', url);
     return this.http.get<string>(url);
   }
 }