diff --git a/meilisearch-lib/src/index_resolver/mod.rs b/meilisearch-lib/src/index_resolver/mod.rs
index ff03ed0f8..316528647 100644
--- a/meilisearch-lib/src/index_resolver/mod.rs
+++ b/meilisearch-lib/src/index_resolver/mod.rs
@@ -170,7 +170,7 @@ mod real {
             }
         }
 
-        pub async fn process_document_addition_batch(&self, mut tasks: Vec<Task>) -> Vec<Task> {
+        pub async fn process_document_addition_batch(&self, tasks: &mut [Task]) {
             fn get_content_uuid(task: &Task) -> Uuid {
                 match task {
                     Task {
@@ -218,7 +218,8 @@ mod real {
                                     timestamp: now,
                                 });
                             }
-                            return tasks;
+
+                            return;
                         }
                     };
 
@@ -253,8 +254,6 @@ mod real {
                     for task in tasks.iter_mut() {
                         task.events.push(event.clone());
                     }
-
-                    tasks
                 }
                 _ => panic!("invalid batch!"),
             }
@@ -265,7 +264,7 @@ mod real {
             Ok(())
         }
 
-        pub async fn process_task(&self, task: &Task) -> Result<TaskResult> {
+        async fn process_task_inner(&self, task: &Task) -> Result<TaskResult> {
             match &task.content {
                 TaskContent::DocumentAddition { .. } => {
                     panic!("updates should be handled by batch")
@@ -354,6 +353,13 @@ mod real {
             }
         }
 
+        pub async fn process_task(&self, task: &mut Task) {
+            match self.process_task_inner(task).await {
+                Ok(res) => task.events.push(TaskEvent::succeeded(res)),
+                Err(e) => task.events.push(TaskEvent::failed(e)),
+            }
+        }
+
         pub async fn dump(&self, path: impl AsRef<Path>) -> Result<()> {
             for (_, index) in self.list().await? {
                 index.dump(&path)?;
@@ -502,7 +508,7 @@ mod test {
             Self::Mock(mocker)
         }
 
-        pub async fn process_document_addition_batch(&self, tasks: Vec<Task>) -> Vec<Task> {
+        pub async fn process_document_addition_batch(&self, tasks: &mut [Task]) {
             match self {
                 IndexResolver::Real(r) => r.process_document_addition_batch(tasks).await,
                 IndexResolver::Mock(m) => unsafe {
@@ -511,7 +517,7 @@ mod test {
             }
         }
 
-        pub async fn process_task(&self, task: &Task) -> Result<TaskResult> {
+        pub async fn process_task(&self, task: &mut Task) {
             match self {
                 IndexResolver::Real(r) => r.process_task(task).await,
                 IndexResolver::Mock(m) => unsafe { m.get("process_task").call(task) },
diff --git a/meilisearch-lib/src/tasks/handlers/dump_handler.rs b/meilisearch-lib/src/tasks/handlers/dump_handler.rs
index c708dadcc..c0833e4c7 100644
--- a/meilisearch-lib/src/tasks/handlers/dump_handler.rs
+++ b/meilisearch-lib/src/tasks/handlers/dump_handler.rs
@@ -27,7 +27,7 @@ where
                             .content
                             .push_event(TaskEvent::succeeded(TaskResult::Other));
                     }
-                    Err(e) => batch.content.push_event(TaskEvent::failed(e.into())),
+                    Err(e) => batch.content.push_event(TaskEvent::failed(e)),
                 }
                 batch
             }
diff --git a/meilisearch-lib/src/tasks/handlers/index_resolver_handler.rs b/meilisearch-lib/src/tasks/handlers/index_resolver_handler.rs
index de624106c..0975ba912 100644
--- a/meilisearch-lib/src/tasks/handlers/index_resolver_handler.rs
+++ b/meilisearch-lib/src/tasks/handlers/index_resolver_handler.rs
@@ -1,7 +1,6 @@
 use crate::index_resolver::IndexResolver;
 use crate::index_resolver::{index_store::IndexStore, meta_store::IndexMetaStore};
 use crate::tasks::batch::{Batch, BatchContent};
-use crate::tasks::task::TaskEvent;
 use crate::tasks::BatchHandler;
 
 #[async_trait::async_trait]
@@ -20,14 +19,11 @@ where
     async fn process_batch(&self, mut batch: Batch) -> Batch {
         match batch.content {
             BatchContent::DocumentsAdditionBatch(ref mut tasks) => {
-                *tasks = self
-                    .process_document_addition_batch(std::mem::take(tasks))
-                    .await;
+                self.process_document_addition_batch(tasks).await;
+            }
+            BatchContent::IndexUpdate(ref mut task) => {
+                self.process_task(task).await;
             }
-            BatchContent::IndexUpdate(ref mut task) => match self.process_task(task).await {
-                Ok(success) => task.events.push(TaskEvent::succeeded(success)),
-                Err(err) => task.events.push(TaskEvent::failed(err.into())),
-            },
             _ => unreachable!(),
         }
 
@@ -54,7 +50,6 @@ mod test {
     use crate::index_resolver::{
         error::Result as IndexResult, index_store::MockIndexStore, meta_store::MockIndexMetaStore,
     };
-    use crate::tasks::task::TaskResult;
     use crate::tasks::{
         handlers::test::task_to_batch,
         task::{Task, TaskContent},
@@ -177,11 +172,11 @@ mod test {
                 let mocker = Mocker::default();
                 match task.content {
                     TaskContent::DocumentAddition { .. } => {
-                        mocker.when::<Vec<Task>, Vec<Task>>("process_document_addition_batch").then(|tasks| tasks);
+                        mocker.when::<&mut [Task], ()>("process_document_addition_batch").then(|_| ());
                     }
                     TaskContent::Dump { .. } => (),
                     _ => {
-                        mocker.when::<&Task, IndexResult<TaskResult>>("process_task").then(|_| Ok(TaskResult::Other));
+                        mocker.when::<&mut Task, ()>("process_task").then(|_| ());
                     }
                 }
                 let index_resolver: IndexResolver<HeedMetaStore, MapIndexStore> = IndexResolver::mock(mocker);
diff --git a/meilisearch-lib/src/tasks/task.rs b/meilisearch-lib/src/tasks/task.rs
index f19f6cbfe..cf9ab0520 100644
--- a/meilisearch-lib/src/tasks/task.rs
+++ b/meilisearch-lib/src/tasks/task.rs
@@ -68,9 +68,9 @@ impl TaskEvent {
         }
     }
 
-    pub fn failed(error: ResponseError) -> Self {
+    pub fn failed(error: impl Into<ResponseError>) -> Self {
         Self::Failed {
-            error,
+            error: error.into(),
             timestamp: OffsetDateTime::now_utc(),
         }
     }