diff --git a/vm/src/callable.rs b/vm/src/callable.rs
deleted file mode 100644
index 9e18779f3..000000000
--- a/vm/src/callable.rs
+++ /dev/null
@@ -1,10 +0,0 @@
-use crate::function::PyFuncArgs;
-use crate::pyobject::{PyResult, PyValue};
-use crate::VirtualMachine;
-
-#[pyimpl]
-pub trait PyBuiltinCallable: PyValue {
-    #[pymethod(magic)]
-    #[pyslot]
-    fn call(&self, args: PyFuncArgs, vm: &VirtualMachine) -> PyResult;
-}
diff --git a/vm/src/lib.rs b/vm/src/lib.rs
index fb4f1ee66..421984e90 100644
--- a/vm/src/lib.rs
+++ b/vm/src/lib.rs
@@ -58,9 +58,7 @@ macro_rules! py_compile_bytecode {
 pub mod macros;
 
 mod builtins;
-mod callable;
 pub mod cformat;
-mod descriptor;
 mod dictdatatype;
 #[cfg(feature = "rustpython-compiler")]
 pub mod eval;
@@ -76,6 +74,7 @@ mod pyhash;
 pub mod pyobject;
 pub mod scope;
 mod sequence;
+mod slots;
 pub mod stdlib;
 mod sysmodule;
 pub mod types;
diff --git a/vm/src/obj/objbuiltinfunc.rs b/vm/src/obj/objbuiltinfunc.rs
index 68ff0ca51..124eb4099 100644
--- a/vm/src/obj/objbuiltinfunc.rs
+++ b/vm/src/obj/objbuiltinfunc.rs
@@ -1,12 +1,11 @@
 use std::fmt;
 
-use crate::callable::PyBuiltinCallable;
-use crate::descriptor::PyBuiltinDescriptor;
 use crate::function::{OptionalArg, PyFuncArgs, PyNativeFunc};
 use crate::obj::objtype::PyClassRef;
 use crate::pyobject::{
     IdProtocol, PyClassImpl, PyContext, PyObjectRef, PyRef, PyResult, PyValue, TypeProtocol,
 };
+use crate::slots::{PyBuiltinCallable, PyBuiltinDescriptor};
 use crate::vm::VirtualMachine;
 
 #[pyclass]
diff --git a/vm/src/obj/objclassmethod.rs b/vm/src/obj/objclassmethod.rs
index 2057c728d..34b652503 100644
--- a/vm/src/obj/objclassmethod.rs
+++ b/vm/src/obj/objclassmethod.rs
@@ -1,9 +1,9 @@
 use super::objtype::PyClassRef;
-use crate::descriptor::PyBuiltinDescriptor;
 use crate::function::OptionalArg;
 use crate::pyobject::{
     PyClassImpl, PyContext, PyObjectRef, PyRef, PyResult, PyValue, TypeProtocol,
 };
+use crate::slots::PyBuiltinDescriptor;
 use crate::vm::VirtualMachine;
 
 /// classmethod(function) -> method
diff --git a/vm/src/obj/objfunction.rs b/vm/src/obj/objfunction.rs
index 33aca496f..f3b0e1fdb 100644
--- a/vm/src/obj/objfunction.rs
+++ b/vm/src/obj/objfunction.rs
@@ -4,8 +4,6 @@ use super::objstr::PyStringRef;
 use super::objtuple::PyTupleRef;
 use super::objtype::PyClassRef;
 use crate::bytecode;
-use crate::callable::PyBuiltinCallable;
-use crate::descriptor::PyBuiltinDescriptor;
 use crate::frame::Frame;
 use crate::function::{OptionalArg, PyFuncArgs};
 use crate::obj::objcoroutine::PyCoroutine;
@@ -15,6 +13,7 @@ use crate::pyobject::{
     TypeProtocol,
 };
 use crate::scope::Scope;
+use crate::slots::{PyBuiltinCallable, PyBuiltinDescriptor};
 use crate::vm::VirtualMachine;
 
 pub type PyFunctionRef = PyRef<PyFunction>;
diff --git a/vm/src/obj/objproperty.rs b/vm/src/obj/objproperty.rs
index 8445243bf..26e53666b 100644
--- a/vm/src/obj/objproperty.rs
+++ b/vm/src/obj/objproperty.rs
@@ -4,12 +4,12 @@
 use std::cell::RefCell;
 
 use super::objtype::PyClassRef;
-use crate::descriptor::PyBuiltinDescriptor;
 use crate::function::{IntoPyNativeFunc, OptionalArg};
 use crate::pyobject::{
     IdProtocol, PyClassImpl, PyContext, PyObject, PyObjectRef, PyRef, PyResult, PyValue,
     TypeProtocol,
 };
+use crate::slots::PyBuiltinDescriptor;
 use crate::vm::VirtualMachine;
 
 // Read-only property, doesn't have __set__ or __delete__
diff --git a/vm/src/obj/objstaticmethod.rs b/vm/src/obj/objstaticmethod.rs
index 3cc2af92e..09c3608a6 100644
--- a/vm/src/obj/objstaticmethod.rs
+++ b/vm/src/obj/objstaticmethod.rs
@@ -1,7 +1,7 @@
 use super::objtype::PyClassRef;
-use crate::descriptor::PyBuiltinDescriptor;
 use crate::function::OptionalArg;
 use crate::pyobject::{PyClassImpl, PyContext, PyObjectRef, PyRef, PyResult, PyValue};
+use crate::slots::PyBuiltinDescriptor;
 use crate::vm::VirtualMachine;
 
 #[pyclass(name = "staticmethod")]
diff --git a/vm/src/obj/objtype.rs b/vm/src/obj/objtype.rs
index 7f607bb47..07625211c 100644
--- a/vm/src/obj/objtype.rs
+++ b/vm/src/obj/objtype.rs
@@ -9,11 +9,12 @@ use super::objproperty::PropertyBuilder;
 use super::objstr::PyStringRef;
 use super::objtuple::PyTuple;
 use super::objweakref::PyWeak;
-use crate::function::{PyFuncArgs, PyNativeFunc};
+use crate::function::PyFuncArgs;
 use crate::pyobject::{
     IdProtocol, PyAttributes, PyContext, PyIterable, PyObject, PyObjectRef, PyRef, PyResult,
     PyValue, TypeProtocol,
 };
+use crate::slots::PyClassSlots;
 use crate::vm::VirtualMachine;
 
 #[derive(Debug)]
@@ -26,19 +27,6 @@ pub struct PyClass {
     pub slots: RefCell<PyClassSlots>,
 }
 
-#[derive(Default)]
-pub struct PyClassSlots {
-    pub new: Option<PyNativeFunc>,
-    pub call: Option<PyNativeFunc>,
-    pub descr_get: Option<PyNativeFunc>,
-}
-
-impl fmt::Debug for PyClassSlots {
-    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
-        f.write_str("PyClassSlots")
-    }
-}
-
 impl fmt::Display for PyClass {
     fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
         fmt::Display::fmt(&self.name, f)
diff --git a/vm/src/descriptor.rs b/vm/src/slots.rs
similarity index 50%
rename from vm/src/descriptor.rs
rename to vm/src/slots.rs
index f298224cf..ecb9660e5 100644
--- a/vm/src/descriptor.rs
+++ b/vm/src/slots.rs
@@ -1,10 +1,30 @@
-use crate::function::OptionalArg;
+use crate::function::{OptionalArg, PyFuncArgs, PyNativeFunc};
 use crate::pyobject::{IdProtocol, PyObjectRef, PyRef, PyResult, PyValue};
 use crate::VirtualMachine;
 
+#[derive(Default)]
+pub struct PyClassSlots {
+    pub new: Option<PyNativeFunc>,
+    pub call: Option<PyNativeFunc>,
+    pub descr_get: Option<PyNativeFunc>,
+}
+
+impl std::fmt::Debug for PyClassSlots {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        f.write_str("PyClassSlots")
+    }
+}
+
+#[pyimpl]
+pub trait PyBuiltinCallable: PyValue {
+    #[pymethod(magic)]
+    #[pyslot]
+    fn call(&self, args: PyFuncArgs, vm: &VirtualMachine) -> PyResult;
+}
+
 #[pyimpl]
 pub trait PyBuiltinDescriptor: PyValue {
-    #[pymethod(name = "__get__")]
+    #[pymethod(magic)]
     #[pyslot(descr_get)]
     fn get(
         zelf: PyRef<Self>,