diff --git a/lib/src/config/dictionaries.rs b/lib/src/config/dictionaries.rs
index f9f2fd82..30178051 100644
--- a/lib/src/config/dictionaries.rs
+++ b/lib/src/config/dictionaries.rs
@@ -56,7 +56,7 @@ impl Dictionary {
     /// Reads the contents of a JSON dictionary file.
     fn read_json_contents(file: &Path) -> Result<HashMap<String, String>, DictionaryConfigError> {
         // Read the contents of the given file.
-        let data = fs::read_to_string(&file).map_err(DictionaryConfigError::IoError)?;
+        let data = fs::read_to_string(file).map_err(DictionaryConfigError::IoError)?;
 
         // Deserialize the contents of the given JSON file.
         let json = match serde_json::from_str(&data)
diff --git a/lib/src/config/object_store.rs b/lib/src/config/object_store.rs
index f17fe8b4..6602d54d 100644
--- a/lib/src/config/object_store.rs
+++ b/lib/src/config/object_store.rs
@@ -70,7 +70,7 @@ impl TryFrom<Table> for ObjectStoreConfig {
                                 err: ObjectStoreConfigError::PathNotAString(key.to_string()),
                             }
                         })?;
-                        fs::read(&path).map_err(|e| {
+                        fs::read(path).map_err(|e| {
                             FastlyConfigError::InvalidObjectStoreDefinition {
                                 name: store.to_string(),
                                 err: ObjectStoreConfigError::IoError(e),
diff --git a/lib/src/session.rs b/lib/src/session.rs
index 05edd48e..990aaf47 100644
--- a/lib/src/session.rs
+++ b/lib/src/session.rs
@@ -710,8 +710,7 @@ impl Session {
     /// stored within each [`SelectTarget`].
     pub fn reinsert_select_targets(&mut self, targets: Vec<SelectTarget>) {
         for target in targets {
-            let async_handle: AsyncItemHandle = target.handle.into();
-            self.async_items[async_handle] = Some(target.item);
+            self.async_items[target.handle] = Some(target.item);
         }
     }
 
@@ -732,7 +731,7 @@ impl Session {
         self.async_items
             .get_mut(handle)
             .map(|ai| ai.as_mut())
-            .ok_or(HandleError::InvalidAsyncItemHandle(handle.into()))
+            .ok_or_else(|| HandleError::InvalidAsyncItemHandle(handle.into()))
     }
 
     pub fn take_async_item(&mut self, handle: AsyncItemHandle) -> Result<AsyncItem, HandleError> {
@@ -742,7 +741,7 @@ impl Session {
         self.async_items
             .get_mut(handle)
             .and_then(|tracked| tracked.take())
-            .ok_or(HandleError::InvalidAsyncItemHandle(handle.into()))
+            .ok_or_else(|| HandleError::InvalidAsyncItemHandle(handle.into()))
     }
 
     pub async fn select_impl(
diff --git a/lib/src/wiggle_abi/req_impl.rs b/lib/src/wiggle_abi/req_impl.rs
index 2bb39070..b1754d54 100644
--- a/lib/src/wiggle_abi/req_impl.rs
+++ b/lib/src/wiggle_abi/req_impl.rs
@@ -202,7 +202,7 @@ impl FastlyHttpReq for Session {
                 .as_array(config.host_override_len)
                 .as_slice()?;
 
-            Some(HeaderValue::from_bytes(&*byte_slice)?)
+            Some(HeaderValue::from_bytes(&byte_slice)?)
         } else {
             None
         };