diff --git a/frontend/index.tsx b/frontend/index.tsx
index 19f44d64..9f6bed48 100644
--- a/frontend/index.tsx
+++ b/frontend/index.tsx
@@ -167,6 +167,7 @@ declare global {
         instructionsPostProcessing?: (() => void)[],
         MathJax: any,
         blocklyUserScale: number,
+        TASK_NEEDS_ADDITIONAL_CHECKS?: boolean,
     }
 }
 
diff --git a/frontend/lang/en-US.ts b/frontend/lang/en-US.ts
index 18fde74c..e5269b3c 100644
--- a/frontend/lang/en-US.ts
+++ b/frontend/lang/en-US.ts
@@ -247,6 +247,7 @@ export default {
     TASK_BLOCK_CATEGORY_UNDEFINED: "Other",
     TASK_LIMIT_TIME: "Time limit:",
     TASK_LIMIT_MEMORY: "Memory limit:",
+    TASK_NOT_READY: "This task needs to be verified. If everything works correctly, remove the line \"window.TASK_NEEDS_ADDITIONAL_CHECKS = true\" at the top of the index.html file, and this banner will disappear.",
 
     LAYOUT_TYPE_REQUIRED_LABEL: "Preview a specific layout:",
     LAYOUT_DefaultLayoutDesktop: 'Desktop',
diff --git a/frontend/lang/fr-FR.ts b/frontend/lang/fr-FR.ts
index fbb52335..12fa1eeb 100644
--- a/frontend/lang/fr-FR.ts
+++ b/frontend/lang/fr-FR.ts
@@ -253,6 +253,7 @@ export default {
     TASK_BLOCK_CATEGORY_UNDEFINED: "Divers",
     TASK_LIMIT_TIME: "Limite de temps :",
     TASK_LIMIT_MEMORY: "Limite de mémoire :",
+    TASK_NOT_READY: "Ce sujet doit être vérifié. Si tout fonctionne bien, retirez la ligne \"window.TASK_NEEDS_ADDITIONAL_CHECKS = true\" en haut du fichier index.html, ce bandeau disparaîtra.",
 
     LAYOUT_TYPE_REQUIRED_LABEL: "Se placer dans un agencement :",
     LAYOUT_DefaultLayoutDesktop: 'Ordinateur',
diff --git a/frontend/task/TaskApp.tsx b/frontend/task/TaskApp.tsx
index 16525d84..022575ad 100644
--- a/frontend/task/TaskApp.tsx
+++ b/frontend/task/TaskApp.tsx
@@ -154,6 +154,10 @@ export function TaskApp() {
                             <span className="task-header__algo">ALGO</span>
                         </div>
 
+                        {!!window.TASK_NEEDS_ADDITIONAL_CHECKS && <div className="task-warning-banner">
+                            <p>{getMessage('TASK_NOT_READY')}</p>
+                        </div>}
+
                         {taskLevels && 1 < Object.keys(taskLevels).length && <TaskLevelTabs/>}
 
                         <div className="task-body">
diff --git a/frontend/task/task.scss b/frontend/task/task.scss
index 93681166..b76ab911 100644
--- a/frontend/task/task.scss
+++ b/frontend/task/task.scss
@@ -1223,3 +1223,17 @@ pre, #app .ace_editor, .stack-view, .subtitles-band-frame {
   align-items: center;
   border: none;
 }
+
+.task-warning-banner {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  background: #efa124;
+  font-weight: bold;
+  text-align: center;
+  padding: 16px;
+
+  p {
+    margin-bottom: 0;
+  }
+}