diff --git a/src/addons/mod/assign/submission/onlinetext/component/onlinetext.ts b/src/addons/mod/assign/submission/onlinetext/component/onlinetext.ts
index d9f32b708..ca9afe172 100644
--- a/src/addons/mod/assign/submission/onlinetext/component/onlinetext.ts
+++ b/src/addons/mod/assign/submission/onlinetext/component/onlinetext.ts
@@ -111,7 +111,7 @@ export class AddonModAssignSubmissionOnlineTextComponent extends AddonModAssignS
      *
      * @param text The new text.
      */
-    onChange(text: string): void {
+    onChange(text?: string | null): void {
         // Count words if needed.
         if (this.wordLimitEnabled) {
             // Cancel previous wait.
diff --git a/src/addons/mod/forum/components/post/post.ts b/src/addons/mod/forum/components/post/post.ts
index c2f1d5e80..63f44e1b1 100644
--- a/src/addons/mod/forum/components/post/post.ts
+++ b/src/addons/mod/forum/components/post/post.ts
@@ -332,8 +332,8 @@ export class AddonModForumPostComponent implements OnInit, OnDestroy, OnChanges
      *
      * @param text The new text.
      */
-    onMessageChange(text: string): void {
-        this.formData.message = text;
+    onMessageChange(text?: string | null): void {
+        this.formData.message = text ?? null;
     }
 
     /**
diff --git a/src/addons/mod/forum/pages/new-discussion/new-discussion.ts b/src/addons/mod/forum/pages/new-discussion/new-discussion.ts
index 6978faa24..3c4921173 100644
--- a/src/addons/mod/forum/pages/new-discussion/new-discussion.ts
+++ b/src/addons/mod/forum/pages/new-discussion/new-discussion.ts
@@ -511,8 +511,8 @@ export class AddonModForumNewDiscussionPage implements OnInit, OnDestroy, CanLea
      *
      * @param text The new text.
      */
-    onMessageChange(text: string): void {
-        this.newDiscussion.message = text;
+    onMessageChange(text?: string | null): void {
+        this.newDiscussion.message = text ?? null;
     }
 
     /**
diff --git a/src/addons/mod/glossary/pages/edit/edit.ts b/src/addons/mod/glossary/pages/edit/edit.ts
index 882f51daa..d5d9a3ed8 100644
--- a/src/addons/mod/glossary/pages/edit/edit.ts
+++ b/src/addons/mod/glossary/pages/edit/edit.ts
@@ -173,8 +173,8 @@ export class AddonModGlossaryEditPage implements OnInit, CanLeave {
      *
      * @param text The new text.
      */
-    onDefinitionChange(text: string): void {
-        this.data.definition = text;
+    onDefinitionChange(text?: string | null): void {
+        this.data.definition = text ?? '';
     }
 
     /**
diff --git a/src/addons/mod/workshop/assessment/accumulative/services/handler.ts b/src/addons/mod/workshop/assessment/accumulative/services/handler.ts
index b6ca10e7c..563be19b8 100644
--- a/src/addons/mod/workshop/assessment/accumulative/services/handler.ts
+++ b/src/addons/mod/workshop/assessment/accumulative/services/handler.ts
@@ -129,9 +129,7 @@ export class AddonModWorkshopAssessmentStrategyAccumulativeHandlerService implem
                     hasErrors = true;
                 }
 
-                if (currentValues[idx].peercomment) {
-                    data['peercomment__idx_' + idx] = currentValues[idx].peercomment;
-                }
+                data['peercomment__idx_' + idx] = currentValues[idx].peercomment ?? '';
 
                 data['gradeid__idx_' + idx] = parseInt(form.current[idx].gradeid, 10) || 0;
                 data['dimensionid__idx_' + idx] = parseInt(field.dimensionid, 10);
diff --git a/src/addons/mod/workshop/assessment/numerrors/services/handler.ts b/src/addons/mod/workshop/assessment/numerrors/services/handler.ts
index b48e438c6..ce7e5dc39 100644
--- a/src/addons/mod/workshop/assessment/numerrors/services/handler.ts
+++ b/src/addons/mod/workshop/assessment/numerrors/services/handler.ts
@@ -112,9 +112,7 @@ export class AddonModWorkshopAssessmentStrategyNumErrorsHandlerService implement
                     hasErrors = true;
                 }
 
-                if (currentValues[idx].peercomment) {
-                    data['peercomment__idx_' + idx] = currentValues[idx].peercomment;
-                }
+                data['peercomment__idx_' + idx] = currentValues[idx].peercomment ?? '';
 
                 data['gradeid__idx_' + idx] = parseInt(form.current[idx].gradeid, 10) || 0;
                 data['dimensionid__idx_' + idx] = parseInt(field.dimensionid, 10);
diff --git a/src/addons/mod/workshop/components/assessment-strategy/assessment-strategy.ts b/src/addons/mod/workshop/components/assessment-strategy/assessment-strategy.ts
index e2ea393c4..90afcbac2 100644
--- a/src/addons/mod/workshop/components/assessment-strategy/assessment-strategy.ts
+++ b/src/addons/mod/workshop/components/assessment-strategy/assessment-strategy.ts
@@ -403,8 +403,8 @@ export class AddonModWorkshopAssessmentStrategyComponent implements OnInit, OnDe
      *
      * @param text The new text.
      */
-    onFeedbackChange(text: string): void {
-        this.feedbackText = text;
+    onFeedbackChange(text?: string | null): void {
+        this.feedbackText = text ?? '';
     }
 
     /**
diff --git a/src/addons/mod/workshop/components/index/addon-mod-workshop-index.html b/src/addons/mod/workshop/components/index/addon-mod-workshop-index.html
index d5c71c7d2..a9ef7ca64 100644
--- a/src/addons/mod/workshop/components/index/addon-mod-workshop-index.html
+++ b/src/addons/mod/workshop/components/index/addon-mod-workshop-index.html
@@ -23,12 +23,16 @@
             phases[workshop!.phase].tasks.length">
             <ion-item button class="ion-text-wrap" *ngFor="let task of phases[workshop!.phase].tasks"
                 [class.item-dimmed]="task.code == 'submit' && !showSubmit" (click)="runTask(task)" detail="false">
-                <ion-icon slot="start" name="far-circle" *ngIf="task.completed == null" aria-hidden="true"></ion-icon>
-                <ion-icon slot="start" name="fas-circle-xmark" color="danger" *ngIf="task.completed == ''" aria-hidden="true">
+                <ion-icon slot="start" name="far-circle" *ngIf="task.completed == null"
+                    [attr.aria-label]="'addon.mod_workshop.tasktodo' | translate"></ion-icon>
+                <ion-icon slot="start" name="fas-circle-xmark" color="danger" *ngIf="task.completed == ''"
+                    [attr.aria-label]="'addon.mod_workshop.taskfail' | translate">
                 </ion-icon>
-                <ion-icon slot="start" name="fas-circle-info" color="info" *ngIf="task.completed == 'info'" aria-hidden="true">
+                <ion-icon slot="start" name="fas-circle-info" color="info" *ngIf="task.completed == 'info'"
+                    [attr.aria-label]="'addon.mod_workshop.taskinfo' | translate">
                 </ion-icon>
-                <ion-icon slot="start" name="fas-circle-check" color="success" *ngIf="task.completed == '1'" aria-hidden="true">
+                <ion-icon slot="start" name="fas-circle-check" color="success" *ngIf="task.completed == '1'"
+                    [attr.aria-label]="'addon.mod_workshop.taskdone' | translate">
                 </ion-icon>
                 <ion-label>
                     <p class="item-heading">{{task.title}}</p>
diff --git a/src/addons/mod/workshop/services/workshop-helper.ts b/src/addons/mod/workshop/services/workshop-helper.ts
index f73414544..3fc6f6011 100644
--- a/src/addons/mod/workshop/services/workshop-helper.ts
+++ b/src/addons/mod/workshop/services/workshop-helper.ts
@@ -19,7 +19,7 @@ import { FileEntry } from '@ionic-native/file/ngx';
 import { CoreFile } from '@services/file';
 import { CoreFileEntry } from '@services/file-helper';
 import { CoreSites } from '@services/sites';
-import { CoreTextUtils } from '@services/utils/text';
+import { CoreTextUtils, CoreTextFormat } from '@services/utils/text';
 import { CoreUtils } from '@services/utils/utils';
 import { makeSingleton, Translate } from '@singletons';
 import { CoreFormFields } from '@singletons/form';
@@ -531,6 +531,7 @@ export class AddonModWorkshopHelperProvider {
             (await AddonWorkshopAssessmentStrategyDelegate.prepareAssessmentData(workshop.strategy ?? '', selectedValues, form)) ||
             {};
         data.feedbackauthor = feedbackText;
+        data.feedbackauthorformat = CoreTextFormat.FORMAT_HTML;
         data.feedbackauthorattachmentsid = attachmentsId;
         data.nodims = form.dimenssionscount;
 
diff --git a/src/addons/mod/workshop/tests/behat/basic_usage.feature b/src/addons/mod/workshop/tests/behat/basic_usage.feature
new file mode 100644
index 000000000..9d6aee8f5
--- /dev/null
+++ b/src/addons/mod/workshop/tests/behat/basic_usage.feature
@@ -0,0 +1,115 @@
+@mod @mod_workshop @app @javascript
+Feature: Test basic usage of workshop activity in app
+
+  Background:
+    Given the following "courses" exist:
+      | fullname | shortname |
+      | Course 1 | C1        |
+    And the following "users" exist:
+      | username | firstname | lastname |
+      | student1 | First     | Student  |
+      | student2 | Second    | Student  |
+      | teacher1 | First     | Teacher  |
+    And the following "course enrolments" exist:
+      | user     | course | role    |
+      | student1 | C1     | student |
+      | student2 | C1     | student |
+      | teacher1 | C1     | editingteacher |
+    And the following "activities" exist:
+      | activity   | name          | intro                 | course | idnumber |
+      | workshop   | Test workshop | Workshop description  | C1     | workshop |
+
+  Scenario: Take a workshop
+
+    # Setup phase
+    Given I entered the workshop activity "workshop" on course "Course 1" as "teacher1" in the app
+    Then I should find "Setup phase" in the app
+    And I should find "Task done" within "Provide instructions for submission" "ion-item" in the app
+    And I should find "Task done" within "Set the workshop description" "ion-item" in the app
+    And I should find "Task to do" within "Edit assessment form" "ion-item" in the app
+    And I should find "Task to do" within "Switch to the next phase" "ion-item" in the app
+
+    When I press "Edit assessment form" in the app
+    And I press "OK" in the app
+    And I switch to the browser tab opened by the app
+    And I log in as "teacher1"
+    And I set the field "id_description__idx_0_editor" to "Was the submission good?"
+    And I press "Save and close"
+    And I change phase in workshop "Test workshop" to "Submission phase"
+    And I close the browser tab opened by the app
+    And I pull to refresh in the app
+    Then I should find "Submission phase" in the app
+    And I should find "Task done" within "Provide instructions for assessment" "ion-item" in the app
+    And I should find "Task to do" within "Allocate submissions" "ion-item" in the app
+    And I should find "expected: 2" within "Allocate submissions" "ion-item" in the app
+    And I should find "submitted: 0" within "Allocate submissions" "ion-item" in the app
+    And I should find "to allocate: 0" within "Allocate submissions" "ion-item" in the app
+
+    # Submission phase
+    Given I entered the workshop activity "workshop" on course "Course 1" as "student1" in the app
+    Then I should find "Task to do" within "Submit your work" "ion-item" in the app
+
+    When I press "Edit submission" in the app
+    And I set the field "Title" to "The Answer" in the app
+    And I set the field "Submission content" to "42" in the app
+    And I press "Save" in the app
+    Then I should find "Task done" within "Submit your work" "ion-item" in the app
+    And I should find "The Answer" in the app
+    And I should find "42" in the app
+
+    Given I entered the workshop activity "workshop" on course "Course 1" as "teacher1" in the app
+    When I pull to refresh in the app
+    Then I should find "Submission phase" in the app
+    And I should find "Task done" within "Provide instructions for assessment" "ion-item" in the app
+    And I should find "Task to do" within "Allocate submissions" "ion-item" in the app
+    And I should find "expected: 2" within "Allocate submissions" "ion-item" in the app
+    And I should find "submitted: 1" within "Allocate submissions" "ion-item" in the app
+    And I should find "to allocate: 1" within "Allocate submissions" "ion-item" in the app
+
+    When I press "Allocate submissions" in the app
+    And I press "OK" in the app
+    And I switch to the browser tab opened by the app
+    And I allocate submissions in workshop "Test workshop" as:
+      | Participant   | Reviewer       |
+      | First Student | Second Student |
+    And I change phase in workshop "Test workshop" to "Assessment phase"
+    And I close the browser tab opened by the app
+    And I pull to refresh in the app
+    Then I should find "Assessment phase" in the app
+
+    # Assessment phase
+    Given I entered the workshop activity "workshop" on course "Course 1" as "student2" in the app
+    Then I should find "Task to do" within "Assess peers" "ion-item" in the app
+
+    When I press "The Answer" in the app
+    And I press "Grade for Aspect 01" in the app
+    And I press "10 / 10" in the app
+    And I press "Save" in the app
+    Then I should find "Assessed submission" in the app
+
+    # Grading evaluation phase
+    Given I entered the workshop activity "workshop" on course "Course 1" as "teacher1" in the app
+    And I press "Switch to the next phase" in the app
+    And I press "OK" in the app
+    And I switch to the browser tab opened by the app
+    And I press "Continue"
+    Then I should see "Grading evaluation phase"
+
+    When I press "Re-calculate grades"
+    Then I should see "calculated: 1"
+
+    When I close the browser tab opened by the app
+    And I pull to refresh in the app
+    Then I should find "Grading evaluation phase" in the app
+
+    # Closed
+    When I press "Switch to the next phase" in the app
+    And I press "OK" in the app
+    And I switch to the browser tab opened by the app
+    And I press "Continue"
+    Then I should see "Closed"
+
+    When I close the browser tab opened by the app
+    And I pull to refresh in the app
+    Then I should find "Closed" in the app
+    And I should find "Conclusion 1" in the app
diff --git a/src/core/services/utils/text.ts b/src/core/services/utils/text.ts
index 23596a41f..55c2b5fb5 100644
--- a/src/core/services/utils/text.ts
+++ b/src/core/services/utils/text.ts
@@ -332,7 +332,7 @@ export class CoreTextUtilsProvider {
      * @param text Text to count.
      * @returns Number of words.
      */
-    countWords(text: string): number {
+    countWords(text?: string | null): number {
         if (!text || typeof text != 'string') {
             return 0;
         }