diff --git a/mountpoint-s3/src/inode.rs b/mountpoint-s3/src/inode.rs
index bb761745a..c0a6f5183 100644
--- a/mountpoint-s3/src/inode.rs
+++ b/mountpoint-s3/src/inode.rs
@@ -711,14 +711,14 @@ impl SuperblockInner {
 
                     let found_directory = if result
                         .common_prefixes
-                        .get(0)
+                        .first()
                         .map(|prefix| prefix.starts_with(&full_path_suffixed))
                         .unwrap_or(false)
                     {
                         true
                     } else if result
                         .objects
-                        .get(0)
+                        .first()
                         .map(|object| object.key.starts_with(&full_path_suffixed))
                         .unwrap_or(false)
                     {
diff --git a/mountpoint-s3/tests/reftests/reference.rs b/mountpoint-s3/tests/reftests/reference.rs
index 848b2c412..87d7c51fb 100644
--- a/mountpoint-s3/tests/reftests/reference.rs
+++ b/mountpoint-s3/tests/reftests/reference.rs
@@ -141,7 +141,7 @@ impl Reference {
     pub fn new(remote_keys: Vec<(String, MockObject)>) -> Self {
         let local_files = vec![];
         let local_directories = vec![];
-        let materialized = build_reference(remote_keys.iter().map(|(k, o)| (k, o)));
+        let materialized = build_reference(remote_keys.iter().map(|(k, o): &(_, _)| (k, o)));
         Self {
             remote_keys: remote_keys.into_iter().collect(),
             local_files,