diff --git a/package.json b/package.json
index a9590c6089f7c043ddc7120edff5a357d5c10554..eedfdc61f25c0ee76b472a86fe14bcf000aef38a 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "mc_frontend",
-  "version": "1.8.0",
+  "version": "1.8.1",
   "author": "Ionic Framework",
   "homepage": "https://ionicframework.com/",
   "scripts": {
diff --git a/src/app/exercise-parameters/exercise-parameters.page.spec.ts b/src/app/exercise-parameters/exercise-parameters.page.spec.ts
index 568a8ceb733d05eb39ceb40a872addb925be5704..0a3ff0c1b94dda226432635d267fb4b1781c2ccc 100644
--- a/src/app/exercise-parameters/exercise-parameters.page.spec.ts
+++ b/src/app/exercise-parameters/exercise-parameters.page.spec.ts
@@ -129,6 +129,7 @@ describe('ExerciseParametersPage', () => {
             Promise.resolve(new AnnisResponse()));
         const navSpy: Spy = spyOn(exerciseParametersPage.helperService, 'goToPreviewPage').and.returnValue(Promise.resolve(true));
         exerciseParametersPage.corpusService.annisResponse = new AnnisResponse();
+        exerciseParametersPage.helperService.applicationState.next(exerciseParametersPage.helperService.deepCopy(MockMC.applicationState));
         exerciseParametersPage.getH5Pexercise(new FormData()).then(() => {
             expect(navSpy).toHaveBeenCalledTimes(1);
             requestSpy.and.callFake(() => Promise.reject());
diff --git a/src/app/preview/preview.page.ts b/src/app/preview/preview.page.ts
index 9bd1010d4de51240577ca47a3a899b7cff08a579..decf3eff7bfc5898db949b9fb3a366dd05b96fa6 100644
--- a/src/app/preview/preview.page.ts
+++ b/src/app/preview/preview.page.ts
@@ -124,7 +124,7 @@ export class PreviewPage implements OnDestroy, OnInit {
         return new Promise<void>((resolve, reject) => {
             const fileUrl: string = configMC.backendBaseUrl + configMC.backendApiFilePath;
             const formData = new FormData();
-            formData.append('learning_result', JSON.stringify(result.statement));
+            formData.append('learning_result', JSON.stringify({0: result.statement}));
             this.helperService.makePostRequest(this.http, this.toastCtrl, fileUrl, formData, '').then(() => {
                 return resolve();
             }, () => {
diff --git a/src/app/test/test.page.html b/src/app/test/test.page.html
index e2af5832bfc8dcb80238390b78cdd27c721147ac..b4a833bc407cfde6389ba0c4cee75aed760e96fd 100644
--- a/src/app/test/test.page.html
+++ b/src/app/test/test.page.html
@@ -118,7 +118,7 @@
                 <ion-col>
                     <ion-card>
                         <ion-item *ngIf="isTestMode">
-                            <ion-icon name="stats" slot="start"></ion-icon>
+                            <ion-icon name="stats-chart" slot="start"></ion-icon>
                             <ion-label position="stacked">
                                 <h2>{{ 'RESULT' | translate }} {{ 'UNIT_DIAGNOSIS_TITLE' | translate}}:</h2></ion-label>
                             <br>