diff --git a/core/src/avm2/globals/boolean.rs b/core/src/avm2/globals/boolean.rs
index b2b06aec3..946d890bb 100644
--- a/core/src/avm2/globals/boolean.rs
+++ b/core/src/avm2/globals/boolean.rs
@@ -82,8 +82,8 @@ fn class_init<'gc>(
             .into(),
             activation,
         )?;
-        boolean_proto.set_local_property_is_enumerable(gc_context, "toString".into(), false)?;
-        boolean_proto.set_local_property_is_enumerable(gc_context, "valueOf".into(), false)?;
+        boolean_proto.set_local_property_is_enumerable(gc_context, "toString".into(), false);
+        boolean_proto.set_local_property_is_enumerable(gc_context, "valueOf".into(), false);
     }
 
     Ok(Value::Undefined)
diff --git a/core/src/avm2/globals/date.rs b/core/src/avm2/globals/date.rs
index 0baa85981..e964f2611 100644
--- a/core/src/avm2/globals/date.rs
+++ b/core/src/avm2/globals/date.rs
@@ -316,7 +316,7 @@ pub fn class_init<'gc>(
                 .into(),
                 activation,
             )?;
-            date_proto.set_local_property_is_enumerable(gc_context, (*name).into(), false)?;
+            date_proto.set_local_property_is_enumerable(gc_context, (*name).into(), false);
         }
     }
     Ok(Value::Undefined)
diff --git a/core/src/avm2/globals/function.rs b/core/src/avm2/globals/function.rs
index 57eeac149..183acfac0 100644
--- a/core/src/avm2/globals/function.rs
+++ b/core/src/avm2/globals/function.rs
@@ -64,12 +64,12 @@ pub fn class_init<'gc>(
             activation.context.gc_context,
             "call".into(),
             false,
-        )?;
+        );
         function_proto.set_local_property_is_enumerable(
             activation.context.gc_context,
             "apply".into(),
             false,
-        )?;
+        );
     }
     Ok(Value::Undefined)
 }
diff --git a/core/src/avm2/globals/int.rs b/core/src/avm2/globals/int.rs
index ee2dca981..6d2723b53 100644
--- a/core/src/avm2/globals/int.rs
+++ b/core/src/avm2/globals/int.rs
@@ -120,11 +120,11 @@ fn class_init<'gc>(
             activation,
         )?;
 
-        int_proto.set_local_property_is_enumerable(gc_context, "toExponential".into(), false)?;
-        int_proto.set_local_property_is_enumerable(gc_context, "toFixed".into(), false)?;
-        int_proto.set_local_property_is_enumerable(gc_context, "toPrecision".into(), false)?;
-        int_proto.set_local_property_is_enumerable(gc_context, "toString".into(), false)?;
-        int_proto.set_local_property_is_enumerable(gc_context, "valueOf".into(), false)?;
+        int_proto.set_local_property_is_enumerable(gc_context, "toExponential".into(), false);
+        int_proto.set_local_property_is_enumerable(gc_context, "toFixed".into(), false);
+        int_proto.set_local_property_is_enumerable(gc_context, "toPrecision".into(), false);
+        int_proto.set_local_property_is_enumerable(gc_context, "toString".into(), false);
+        int_proto.set_local_property_is_enumerable(gc_context, "valueOf".into(), false);
     }
 
     Ok(Value::Undefined)
diff --git a/core/src/avm2/globals/number.rs b/core/src/avm2/globals/number.rs
index 68d7a4b96..25c8640ab 100644
--- a/core/src/avm2/globals/number.rs
+++ b/core/src/avm2/globals/number.rs
@@ -118,11 +118,11 @@ fn class_init<'gc>(
             .into(),
             activation,
         )?;
-        number_proto.set_local_property_is_enumerable(gc_context, "toExponential".into(), false)?;
-        number_proto.set_local_property_is_enumerable(gc_context, "toFixed".into(), false)?;
-        number_proto.set_local_property_is_enumerable(gc_context, "toPrecision".into(), false)?;
-        number_proto.set_local_property_is_enumerable(gc_context, "toString".into(), false)?;
-        number_proto.set_local_property_is_enumerable(gc_context, "valueOf".into(), false)?;
+        number_proto.set_local_property_is_enumerable(gc_context, "toExponential".into(), false);
+        number_proto.set_local_property_is_enumerable(gc_context, "toFixed".into(), false);
+        number_proto.set_local_property_is_enumerable(gc_context, "toPrecision".into(), false);
+        number_proto.set_local_property_is_enumerable(gc_context, "toString".into(), false);
+        number_proto.set_local_property_is_enumerable(gc_context, "valueOf".into(), false);
     }
 
     Ok(Value::Undefined)
diff --git a/core/src/avm2/globals/object.rs b/core/src/avm2/globals/object.rs
index 365b1514e..eb1c0c4e8 100644
--- a/core/src/avm2/globals/object.rs
+++ b/core/src/avm2/globals/object.rs
@@ -139,29 +139,21 @@ pub fn class_init<'gc>(
             activation,
         )?;
 
-        object_proto.set_local_property_is_enumerable(
-            gc_context,
-            "hasOwnProperty".into(),
-            false,
-        )?;
+        object_proto.set_local_property_is_enumerable(gc_context, "hasOwnProperty".into(), false);
         object_proto.set_local_property_is_enumerable(
             gc_context,
             "propertyIsEnumerable".into(),
             false,
-        )?;
+        );
         object_proto.set_local_property_is_enumerable(
             gc_context,
             "setPropertyIsEnumerable".into(),
             false,
-        )?;
-        object_proto.set_local_property_is_enumerable(gc_context, "isPrototypeOf".into(), false)?;
-        object_proto.set_local_property_is_enumerable(gc_context, "toString".into(), false)?;
-        object_proto.set_local_property_is_enumerable(
-            gc_context,
-            "toLocaleString".into(),
-            false,
-        )?;
-        object_proto.set_local_property_is_enumerable(gc_context, "valueOf".into(), false)?;
+        );
+        object_proto.set_local_property_is_enumerable(gc_context, "isPrototypeOf".into(), false);
+        object_proto.set_local_property_is_enumerable(gc_context, "toString".into(), false);
+        object_proto.set_local_property_is_enumerable(gc_context, "toLocaleString".into(), false);
+        object_proto.set_local_property_is_enumerable(gc_context, "valueOf".into(), false);
     }
 
     Ok(Value::Undefined)
@@ -260,7 +252,7 @@ pub fn set_property_is_enumerable<'gc>(
     let name = name?.coerce_to_string(activation)?;
 
     if let Some(Value::Bool(is_enum)) = args.get(1) {
-        this.set_local_property_is_enumerable(activation.context.gc_context, name, *is_enum)?;
+        this.set_local_property_is_enumerable(activation.context.gc_context, name, *is_enum);
     }
 
     Ok(Value::Undefined)
diff --git a/core/src/avm2/globals/qname.rs b/core/src/avm2/globals/qname.rs
index 9efca90ad..3175aabda 100644
--- a/core/src/avm2/globals/qname.rs
+++ b/core/src/avm2/globals/qname.rs
@@ -99,12 +99,12 @@ pub fn class_init<'gc>(
         activation.context.gc_context,
         "toString".into(),
         false,
-    )?;
+    );
     qname_proto.set_local_property_is_enumerable(
         activation.context.gc_context,
         "valueOf".into(),
         false,
-    )?;
+    );
 
     Ok(Value::Undefined)
 }
diff --git a/core/src/avm2/globals/uint.rs b/core/src/avm2/globals/uint.rs
index a97f7fd3f..45b52e064 100644
--- a/core/src/avm2/globals/uint.rs
+++ b/core/src/avm2/globals/uint.rs
@@ -119,11 +119,11 @@ fn class_init<'gc>(
             .into(),
             activation,
         )?;
-        uint_proto.set_local_property_is_enumerable(gc_context, "toExponential".into(), false)?;
-        uint_proto.set_local_property_is_enumerable(gc_context, "toFixed".into(), false)?;
-        uint_proto.set_local_property_is_enumerable(gc_context, "toPrecision".into(), false)?;
-        uint_proto.set_local_property_is_enumerable(gc_context, "toString".into(), false)?;
-        uint_proto.set_local_property_is_enumerable(gc_context, "valueOf".into(), false)?;
+        uint_proto.set_local_property_is_enumerable(gc_context, "toExponential".into(), false);
+        uint_proto.set_local_property_is_enumerable(gc_context, "toFixed".into(), false);
+        uint_proto.set_local_property_is_enumerable(gc_context, "toPrecision".into(), false);
+        uint_proto.set_local_property_is_enumerable(gc_context, "toString".into(), false);
+        uint_proto.set_local_property_is_enumerable(gc_context, "valueOf".into(), false);
     }
 
     Ok(Value::Undefined)
diff --git a/core/src/avm2/globals/vector.rs b/core/src/avm2/globals/vector.rs
index 52d432f21..919c89647 100644
--- a/core/src/avm2/globals/vector.rs
+++ b/core/src/avm2/globals/vector.rs
@@ -227,7 +227,7 @@ pub fn specialized_class_init<'gc>(
                 activation.context.gc_context,
                 (*pubname).into(),
                 false,
-            )?;
+            );
         }
     }
 
diff --git a/core/src/avm2/object.rs b/core/src/avm2/object.rs
index bac003821..e7b9387dc 100644
--- a/core/src/avm2/object.rs
+++ b/core/src/avm2/object.rs
@@ -588,7 +588,7 @@ pub trait TObject<'gc>: 'gc + Collect + Debug + Into<Object<'gc>> + Clone + Copy
         mc: MutationContext<'gc, '_>,
         name: AvmString<'gc>,
         is_enumerable: bool,
-    ) -> Result<(), Error> {
+    ) {
         let mut base = self.base_mut(mc);
 
         base.set_local_property_is_enumerable(name, is_enumerable)
diff --git a/core/src/avm2/object/class_object.rs b/core/src/avm2/object/class_object.rs
index 6df4fc484..7f29a40df 100644
--- a/core/src/avm2/object/class_object.rs
+++ b/core/src/avm2/object/class_object.rs
@@ -293,7 +293,7 @@ impl<'gc> ClassObject<'gc> {
             activation.context.gc_context,
             "constructor".into(),
             false,
-        )?;
+        );
 
         Ok(())
     }
@@ -848,11 +848,11 @@ impl<'gc> TObject<'gc> for ClassObject<'gc> {
         mc: MutationContext<'gc, '_>,
         name: AvmString<'gc>,
         is_enumerable: bool,
-    ) -> Result<(), Error> {
+    ) {
         self.0
             .write(mc)
             .base
-            .set_local_property_is_enumerable(name, is_enumerable)
+            .set_local_property_is_enumerable(name, is_enumerable);
     }
 
     fn apply(
diff --git a/core/src/avm2/object/dictionary_object.rs b/core/src/avm2/object/dictionary_object.rs
index d6cf8c6f2..f92f4cbce 100644
--- a/core/src/avm2/object/dictionary_object.rs
+++ b/core/src/avm2/object/dictionary_object.rs
@@ -142,7 +142,6 @@ impl<'gc> TObject<'gc> for DictionaryObject<'gc> {
         _mc: MutationContext<'gc, '_>,
         _name: AvmString<'gc>,
         _is_enumerable: bool,
-    ) -> Result<(), Error> {
-        Ok(())
+    ) {
     }
 }
diff --git a/core/src/avm2/object/script_object.rs b/core/src/avm2/object/script_object.rs
index 74d587622..5f17e4dfe 100644
--- a/core/src/avm2/object/script_object.rs
+++ b/core/src/avm2/object/script_object.rs
@@ -397,11 +397,7 @@ impl<'gc> ScriptObjectData<'gc> {
         self.enumerants.contains(&name)
     }
 
-    pub fn set_local_property_is_enumerable(
-        &mut self,
-        name: AvmString<'gc>,
-        is_enumerable: bool,
-    ) -> Result<(), Error> {
+    pub fn set_local_property_is_enumerable(&mut self, name: AvmString<'gc>, is_enumerable: bool) {
         if is_enumerable && self.values.contains_key(&name) && !self.enumerants.contains(&name) {
             self.enumerants.push(name);
         } else if !is_enumerable && self.enumerants.contains(&name) {
@@ -416,8 +412,6 @@ impl<'gc> ScriptObjectData<'gc> {
                 self.enumerants.remove(index);
             }
         }
-
-        Ok(())
     }
 
     /// Gets the number of (standard) enumerants.