diff --git a/boa_engine/src/object/internal_methods/array.rs b/boa_engine/src/object/internal_methods/array.rs
index 82ded2229e5..6e095174f51 100644
--- a/boa_engine/src/object/internal_methods/array.rs
+++ b/boa_engine/src/object/internal_methods/array.rs
@@ -32,15 +32,15 @@ pub(crate) fn array_exotic_define_own_property(
     context: &mut Context<'_>,
 ) -> JsResult<bool> {
     // 1. Assert: IsPropertyKey(P) is true.
-    match key {
+    match *key {
         // 2. If P is "length", then
-        &PropertyKey::String(ref s) if s == utf16!("length") => {
+        PropertyKey::String(ref s) if s == utf16!("length") => {
             // a. Return ? ArraySetLength(A, Desc).
 
             array_set_length(obj, desc, context)
         }
         // 3. Else if P is an array index, then
-        &PropertyKey::Index(index) if index < u32::MAX => {
+        PropertyKey::Index(index) if index < u32::MAX => {
             // a. Let oldLenDesc be OrdinaryGetOwnProperty(A, "length").
             let old_len_desc =
                 super::ordinary_get_own_property(obj, &utf16!("length").into(), context)?
diff --git a/boa_engine/src/object/internal_methods/global.rs b/boa_engine/src/object/internal_methods/global.rs
index 6ce99aedade..41be3c3d052 100644
--- a/boa_engine/src/object/internal_methods/global.rs
+++ b/boa_engine/src/object/internal_methods/global.rs
@@ -66,14 +66,14 @@ pub(crate) fn global_define_own_property(
 ) -> JsResult<bool> {
     let _timer = Profiler::global().start_event("Object::global_define_own_property", "object");
     // 1. Let current be ? O.[[GetOwnProperty]](P).
-    let current = global_get_own_property(obj, &key, context)?;
+    let current = global_get_own_property(obj, key, context)?;
 
     // 2. Let extensible be ? IsExtensible(O).
     let extensible = obj.__is_extensible__(context)?;
 
     // 3. Return ValidateAndApplyPropertyDescriptor(O, P, extensible, Desc, current).
     Ok(validate_and_apply_property_descriptor(
-        &key, extensible, desc, current, context,
+        key, extensible, desc, current, context,
     ))
 }
 
diff --git a/boa_engine/src/object/internal_methods/mod.rs b/boa_engine/src/object/internal_methods/mod.rs
index c679d801b57..00279675f66 100644
--- a/boa_engine/src/object/internal_methods/mod.rs
+++ b/boa_engine/src/object/internal_methods/mod.rs
@@ -468,7 +468,7 @@ pub(crate) fn ordinary_define_own_property(
 ) -> JsResult<bool> {
     let _timer = Profiler::global().start_event("Object::ordinary_define_own_property", "object");
     // 1. Let current be ? O.[[GetOwnProperty]](P).
-    let current = obj.__get_own_property__(&key, context)?;
+    let current = obj.__get_own_property__(key, context)?;
 
     // 2. Let extensible be ? IsExtensible(O).
     let extensible = obj.__is_extensible__(context)?;
@@ -782,7 +782,7 @@ pub(crate) fn validate_and_apply_property_descriptor(
 
         if let Some((obj, key)) = obj_and_key {
             obj.borrow_mut().properties.insert(
-                &key,
+                key,
                 // c. If IsGenericDescriptor(Desc) is true or IsDataDescriptor(Desc) is true, then
                 if desc.is_generic_descriptor() || desc.is_data_descriptor() {
                     // i. If O is not undefined, create an own data property named P of
@@ -899,7 +899,7 @@ pub(crate) fn validate_and_apply_property_descriptor(
         // a. For each field of Desc that is present, set the corresponding attribute of the
         // property named P of object O to the value of the field.
         current.fill_with(&desc);
-        obj.borrow_mut().properties.insert(&key, current);
+        obj.borrow_mut().properties.insert(key, current);
     }
 
     // 10. Return true.
diff --git a/boa_engine/src/object/internal_methods/proxy.rs b/boa_engine/src/object/internal_methods/proxy.rs
index 8fbd308f97c..6874d8d5d9d 100644
--- a/boa_engine/src/object/internal_methods/proxy.rs
+++ b/boa_engine/src/object/internal_methods/proxy.rs
@@ -430,7 +430,7 @@ pub(crate) fn proxy_exotic_define_own_property(
     }
 
     // 10. Let targetDesc be ? target.[[GetOwnProperty]](P).
-    let target_desc = target.__get_own_property__(&key, context)?;
+    let target_desc = target.__get_own_property__(key, context)?;
 
     // 11. Let extensibleTarget be ? IsExtensible(target).
     let extensible_target = target.is_extensible(context)?;
diff --git a/boa_engine/src/object/internal_methods/string.rs b/boa_engine/src/object/internal_methods/string.rs
index 4f4f0c857a1..d0f316a2f6f 100644
--- a/boa_engine/src/object/internal_methods/string.rs
+++ b/boa_engine/src/object/internal_methods/string.rs
@@ -58,7 +58,7 @@ pub(crate) fn string_exotic_define_own_property(
 ) -> JsResult<bool> {
     // 1. Assert: IsPropertyKey(P) is true.
     // 2. Let stringDesc be ! StringGetOwnProperty(S, P).
-    let string_desc = string_get_own_property(obj, &key);
+    let string_desc = string_get_own_property(obj, key);
 
     // 3. If stringDesc is not undefined, then
     if let Some(string_desc) = string_desc {
diff --git a/boa_engine/src/object/mod.rs b/boa_engine/src/object/mod.rs
index 012fe654f91..3f583045378 100644
--- a/boa_engine/src/object/mod.rs
+++ b/boa_engine/src/object/mod.rs
@@ -83,10 +83,10 @@ pub(crate) trait JsObjectType:
 }
 
 /// Const `constructor`, usually set on prototypes as a key to point to their respective constructor object.
-pub const CONSTRUCTOR: &'static [u16] = utf16!("constructor");
+pub const CONSTRUCTOR: &[u16] = utf16!("constructor");
 
 /// Const `prototype`, usually set on constructors as a key to point to their respective prototype object.
-pub const PROTOTYPE: &'static [u16] = utf16!("prototype");
+pub const PROTOTYPE: &[u16] = utf16!("prototype");
 
 /// Common field names.