diff --git a/openvidu-testapp/src/app/components/test-sessions/test-sessions.component.html b/openvidu-testapp/src/app/components/test-sessions/test-sessions.component.html
index 6e638ae2..89c46561 100644
--- a/openvidu-testapp/src/app/components/test-sessions/test-sessions.component.html
+++ b/openvidu-testapp/src/app/components/test-sessions/test-sessions.component.html
@@ -10,10 +10,10 @@
     <div class="scenario-div">
       <mat-checkbox id="mediasoup-checkbox" class="auto-join-check" [(ngModel)]="useMediasoup" name="useMediasoup">Mediasoup</mat-checkbox>
       <mat-checkbox id="auto-join-checkbox" class="auto-join-check" [(ngModel)]="autoJoin" name="autoJoin">Auto join</mat-checkbox>
-      <button id="one2one-btn" mat-raised-button color="primary" (click)="loadScenario(numberSubs,0,0)">{{numberSubs}}:{{numberSubs}}</button>
+      <button id="one2one-btn" mat-raised-button color="primary" (click)="loadScenario(Math.max(2, numberSubs), 0,0)">{{Math.max(2, numberSubs)}}</button>
       <button id="one2many-btn" mat-raised-button color="primary" (click)="loadScenario(0,1,numberSubs)">1:{{numberSubs}}</button>
       <mat-form-field>
-        <input id="one2many-input" matInput type="number" [(ngModel)]="numberSubs">
+        <input id="one2many-input" matInput type="number" min="1" [(ngModel)]="numberSubs">
       </mat-form-field>
     </div>
   </div>
diff --git a/openvidu-testapp/src/app/components/test-sessions/test-sessions.component.ts b/openvidu-testapp/src/app/components/test-sessions/test-sessions.component.ts
index 9d0570da..69166455 100644
--- a/openvidu-testapp/src/app/components/test-sessions/test-sessions.component.ts
+++ b/openvidu-testapp/src/app/components/test-sessions/test-sessions.component.ts
@@ -11,6 +11,8 @@ import { SessionConf } from '../openvidu-instance/openvidu-instance.component';
 })
 export class TestSessionsComponent implements OnInit, OnDestroy {
 
+  Math = Math;
+
   openviduUrl: string;
   openviduSecret: string;
 
@@ -20,7 +22,7 @@ export class TestSessionsComponent implements OnInit, OnDestroy {
   // OpenViduInstance collection
   users: SessionConf[] = [];
 
-  numberSubs = 3;
+  numberSubs = 2;
   autoJoin = false;
   useMediasoup = false;