diff --git a/crates/milli/src/index.rs b/crates/milli/src/index.rs
index dd3a6f299..7653bfa2a 100644
--- a/crates/milli/src/index.rs
+++ b/crates/milli/src/index.rs
@@ -1757,7 +1757,7 @@ pub(crate) mod tests {
             indexer.add_documents(&documents).unwrap();
 
             let indexer_alloc = Bump::new();
-            let (document_changes, _operation_stats, primary_key) = indexer.into_changes(
+            let (document_changes, operation_stats, primary_key) = indexer.into_changes(
                 &indexer_alloc,
                 &self.inner,
                 &rtxn,
@@ -1765,6 +1765,10 @@ pub(crate) mod tests {
                 &mut new_fields_ids_map,
             )?;
 
+            if let Some(error) = operation_stats.into_iter().find_map(|stat| stat.error) {
+                return Err(error.into());
+            }
+
             pool.install(|| {
                 indexer::index(
                     wtxn,
@@ -1841,7 +1845,7 @@ pub(crate) mod tests {
             indexer.delete_documents(external_document_ids.as_slice());
 
             let indexer_alloc = Bump::new();
-            let (document_changes, _operation_stats, primary_key) = indexer.into_changes(
+            let (document_changes, operation_stats, primary_key) = indexer.into_changes(
                 &indexer_alloc,
                 &self.inner,
                 &rtxn,
@@ -1849,6 +1853,10 @@ pub(crate) mod tests {
                 &mut new_fields_ids_map,
             )?;
 
+            if let Some(error) = operation_stats.into_iter().find_map(|stat| stat.error) {
+                return Err(error.into());
+            }
+
             pool.install(|| {
                 indexer::index(
                     wtxn,