diff --git a/core/src/services/swift/core.rs b/core/src/services/swift/core.rs
index bac9f48b4f55..1eb0f3d2a94e 100644
--- a/core/src/services/swift/core.rs
+++ b/core/src/services/swift/core.rs
@@ -271,10 +271,7 @@ mod tests {
                 hash: "5e6b5b70b0426b1cc1968003e1afa5ad".to_string(),
                 name: "test.txt".to_string(),
                 last_modified: "2023-11-01T03:00:23.147480".to_string(),
-                content_type: Some(
-                    "multipart/form-data;boundary=------------------------25004a866ee9c0cb"
-                        .to_string()
-                ),
+                content_type: Some("text/plain".to_string()),
             }
         );
 
diff --git a/core/src/services/swift/lister.rs b/core/src/services/swift/lister.rs
index cb3af9b2c06b..ee90a1753777 100644
--- a/core/src/services/swift/lister.rs
+++ b/core/src/services/swift/lister.rs
@@ -95,7 +95,9 @@ impl oio::PageList for SwiftLister {
                     meta.set_content_length(bytes);
                     meta.set_content_md5(hash.as_str());
 
-                    // we'll change "2023-10-28T19:18:11.682610" to "2023-10-28T19:18:11.682610Z"
+                    // OpenStack Swift returns time without 'Z' at the end,
+                    // which causes an error in parse_datetime_from_rfc3339.
+                    // we'll change "2023-10-28T19:18:11.682610" to "2023-10-28T19:18:11.682610Z".
                     if !last_modified.ends_with('Z') {
                         last_modified.push('Z');
                     }