diff --git a/quickwit/quickwit-doc-mapper/src/default_doc_mapper/date_time_type.rs b/quickwit/quickwit-doc-mapper/src/default_doc_mapper/date_time_type.rs
index 31461d97f17..a08a7c379b5 100644
--- a/quickwit/quickwit-doc-mapper/src/default_doc_mapper/date_time_type.rs
+++ b/quickwit/quickwit-doc-mapper/src/default_doc_mapper/date_time_type.rs
@@ -345,7 +345,7 @@ mod tests {
             let error = serde_json::from_str::<InputFormats>(input_formats_json)
                 .unwrap_err()
                 .to_string();
-            assert!(error.contains("invalid format specification"));
+            assert!(error.contains("invalid strptime format"));
         }
     }