diff --git a/extmod/machine_signal.c b/extmod/machine_signal.c
index 3f9f5af947..c494490b60 100644
--- a/extmod/machine_signal.c
+++ b/extmod/machine_signal.c
@@ -49,7 +49,7 @@ STATIC mp_obj_t signal_make_new(const mp_obj_type_t *type, size_t n_args, size_t
     #if defined(MICROPY_PY_MACHINE_PIN_MAKE_NEW)
     mp_pin_p_t *pin_p = NULL;
 
-    if (MP_OBJ_IS_OBJ(pin)) {
+    if (mp_obj_is_obj(pin)) {
         mp_obj_base_t *pin_base = (mp_obj_base_t*)MP_OBJ_TO_PTR(args[0]);
         pin_p = (mp_pin_p_t*)pin_base->type->protocol;
     }
diff --git a/extmod/moductypes.c b/extmod/moductypes.c
index 68cd5fca9e..9b46371f36 100644
--- a/extmod/moductypes.c
+++ b/extmod/moductypes.c
@@ -137,13 +137,13 @@ STATIC void uctypes_struct_print(const mp_print_t *print, mp_obj_t self_in, mp_p
     (void)kind;
     mp_obj_uctypes_struct_t *self = MP_OBJ_TO_PTR(self_in);
     const char *typen = "unk";
-    if (MP_OBJ_IS_TYPE(self->desc, &mp_type_dict)
+    if (mp_obj_is_type(self->desc, &mp_type_dict)
       #if MICROPY_PY_COLLECTIONS_ORDEREDDICT
-        || MP_OBJ_IS_TYPE(self->desc, &mp_type_ordereddict)
+        || mp_obj_is_type(self->desc, &mp_type_ordereddict)
       #endif
       ) {
         typen = "STRUCT";
-    } else if (MP_OBJ_IS_TYPE(self->desc, &mp_type_tuple)) {
+    } else if (mp_obj_is_type(self->desc, &mp_type_tuple)) {
         mp_obj_tuple_t *t = MP_OBJ_TO_PTR(self->desc);
         mp_int_t offset = MP_OBJ_SMALL_INT_VALUE(t->items[0]);
         uint agg_type = GET_TYPE(offset, AGG_TYPE_BITS);
@@ -210,14 +210,14 @@ STATIC mp_uint_t uctypes_struct_agg_size(mp_obj_tuple_t *t, int layout_type, mp_
 }
 
 STATIC mp_uint_t uctypes_struct_size(mp_obj_t desc_in, int layout_type, mp_uint_t *max_field_size) {
-    if (!MP_OBJ_IS_TYPE(desc_in, &mp_type_dict)
+    if (!mp_obj_is_type(desc_in, &mp_type_dict)
       #if MICROPY_PY_COLLECTIONS_ORDEREDDICT
-        && !MP_OBJ_IS_TYPE(desc_in, &mp_type_ordereddict)
+        && !mp_obj_is_type(desc_in, &mp_type_ordereddict)
       #endif
       ) {
-        if (MP_OBJ_IS_TYPE(desc_in, &mp_type_tuple)) {
+        if (mp_obj_is_type(desc_in, &mp_type_tuple)) {
             return uctypes_struct_agg_size((mp_obj_tuple_t*)MP_OBJ_TO_PTR(desc_in), layout_type, max_field_size);
-        } else if (MP_OBJ_IS_SMALL_INT(desc_in)) {
+        } else if (mp_obj_is_small_int(desc_in)) {
             // We allow sizeof on both type definitions and structures/structure fields,
             // but scalar structure field is lowered into native Python int, so all
             // type info is lost. So, we cannot say if it's scalar type description,
@@ -231,9 +231,9 @@ STATIC mp_uint_t uctypes_struct_size(mp_obj_t desc_in, int layout_type, mp_uint_
     mp_uint_t total_size = 0;
 
     for (mp_uint_t i = 0; i < d->map.alloc; i++) {
-        if (MP_MAP_SLOT_IS_FILLED(&d->map, i)) {
+        if (mp_map_slot_is_filled(&d->map, i)) {
             mp_obj_t v = d->map.table[i].value;
-            if (MP_OBJ_IS_SMALL_INT(v)) {
+            if (mp_obj_is_small_int(v)) {
                 mp_uint_t offset = MP_OBJ_SMALL_INT_VALUE(v);
                 mp_uint_t val_type = GET_TYPE(offset, VAL_TYPE_BITS);
                 offset &= VALUE_MASK(VAL_TYPE_BITS);
@@ -248,7 +248,7 @@ STATIC mp_uint_t uctypes_struct_size(mp_obj_t desc_in, int layout_type, mp_uint_
                     total_size = offset + s;
                 }
             } else {
-                if (!MP_OBJ_IS_TYPE(v, &mp_type_tuple)) {
+                if (!mp_obj_is_type(v, &mp_type_tuple)) {
                     syntax_error();
                 }
                 mp_obj_tuple_t *t = MP_OBJ_TO_PTR(v);
@@ -272,13 +272,13 @@ STATIC mp_uint_t uctypes_struct_size(mp_obj_t desc_in, int layout_type, mp_uint_
 STATIC mp_obj_t uctypes_struct_sizeof(size_t n_args, const mp_obj_t *args) {
     mp_obj_t obj_in = args[0];
     mp_uint_t max_field_size = 0;
-    if (MP_OBJ_IS_TYPE(obj_in, &mp_type_bytearray)) {
+    if (mp_obj_is_type(obj_in, &mp_type_bytearray)) {
         return mp_obj_len(obj_in);
     }
     int layout_type = LAYOUT_NATIVE;
     // We can apply sizeof either to structure definition (a dict)
     // or to instantiated structure
-    if (MP_OBJ_IS_TYPE(obj_in, &uctypes_struct_type)) {
+    if (mp_obj_is_type(obj_in, &uctypes_struct_type)) {
         if (n_args != 1) {
             mp_raise_TypeError(NULL);
         }
@@ -406,16 +406,16 @@ STATIC void set_aligned(uint val_type, void *p, mp_int_t index, mp_obj_t val) {
 STATIC mp_obj_t uctypes_struct_attr_op(mp_obj_t self_in, qstr attr, mp_obj_t set_val) {
     mp_obj_uctypes_struct_t *self = MP_OBJ_TO_PTR(self_in);
 
-    if (!MP_OBJ_IS_TYPE(self->desc, &mp_type_dict)
+    if (!mp_obj_is_type(self->desc, &mp_type_dict)
       #if MICROPY_PY_COLLECTIONS_ORDEREDDICT
-        && !MP_OBJ_IS_TYPE(self->desc, &mp_type_ordereddict)
+        && !mp_obj_is_type(self->desc, &mp_type_ordereddict)
       #endif
       ) {
             mp_raise_TypeError("struct: no fields");
     }
 
     mp_obj_t deref = mp_obj_dict_get(self->desc, MP_OBJ_NEW_QSTR(attr));
-    if (MP_OBJ_IS_SMALL_INT(deref)) {
+    if (mp_obj_is_small_int(deref)) {
         mp_int_t offset = MP_OBJ_SMALL_INT_VALUE(deref);
         mp_uint_t val_type = GET_TYPE(offset, VAL_TYPE_BITS);
         offset &= VALUE_MASK(VAL_TYPE_BITS);
@@ -476,7 +476,7 @@ STATIC mp_obj_t uctypes_struct_attr_op(mp_obj_t self_in, qstr attr, mp_obj_t set
         return MP_OBJ_NULL;
     }
 
-    if (!MP_OBJ_IS_TYPE(deref, &mp_type_tuple)) {
+    if (!mp_obj_is_type(deref, &mp_type_tuple)) {
         syntax_error();
     }
 
@@ -543,7 +543,7 @@ STATIC mp_obj_t uctypes_struct_subscr(mp_obj_t self_in, mp_obj_t index_in, mp_ob
         return MP_OBJ_NULL; // op not supported
     } else {
         // load / store
-        if (!MP_OBJ_IS_TYPE(self->desc, &mp_type_tuple)) {
+        if (!mp_obj_is_type(self->desc, &mp_type_tuple)) {
             mp_raise_TypeError("struct: cannot index");
         }
 
@@ -594,7 +594,7 @@ STATIC mp_obj_t uctypes_struct_subscr(mp_obj_t self_in, mp_obj_t index_in, mp_ob
 
         } else if (agg_type == PTR) {
             byte *p = *(void**)self->addr;
-            if (MP_OBJ_IS_SMALL_INT(t->items[1])) {
+            if (mp_obj_is_small_int(t->items[1])) {
                 uint val_type = GET_TYPE(MP_OBJ_SMALL_INT_VALUE(t->items[1]), VAL_TYPE_BITS);
                 return get_aligned(val_type, p, index);
             } else {
@@ -618,7 +618,7 @@ STATIC mp_obj_t uctypes_struct_unary_op(mp_unary_op_t op, mp_obj_t self_in) {
     mp_obj_uctypes_struct_t *self = MP_OBJ_TO_PTR(self_in);
     switch (op) {
         case MP_UNARY_OP_INT:
-            if (MP_OBJ_IS_TYPE(self->desc, &mp_type_tuple)) {
+            if (mp_obj_is_type(self->desc, &mp_type_tuple)) {
                 mp_obj_tuple_t *t = MP_OBJ_TO_PTR(self->desc);
                 mp_int_t offset = MP_OBJ_SMALL_INT_VALUE(t->items[0]);
                 uint agg_type = GET_TYPE(offset, AGG_TYPE_BITS);
diff --git a/extmod/moduheapq.c b/extmod/moduheapq.c
index 71c15368bf..bdaf191e94 100644
--- a/extmod/moduheapq.c
+++ b/extmod/moduheapq.c
@@ -32,7 +32,7 @@
 // the algorithm here is modelled on CPython's heapq.py
 
 STATIC mp_obj_list_t *get_heap(mp_obj_t heap_in) {
-    if (!MP_OBJ_IS_TYPE(heap_in, &mp_type_list)) {
+    if (!mp_obj_is_type(heap_in, &mp_type_list)) {
         mp_raise_TypeError("heap must be a list");
     }
     return MP_OBJ_TO_PTR(heap_in);
diff --git a/extmod/moduselect.c b/extmod/moduselect.c
index 582814b0b6..13bf5611e7 100644
--- a/extmod/moduselect.c
+++ b/extmod/moduselect.c
@@ -77,7 +77,7 @@ STATIC void poll_map_add(mp_map_t *poll_map, const mp_obj_t *obj, mp_uint_t obj_
 STATIC mp_uint_t poll_map_poll(mp_map_t *poll_map, size_t *rwx_num) {
     mp_uint_t n_ready = 0;
     for (mp_uint_t i = 0; i < poll_map->alloc; ++i) {
-        if (!MP_MAP_SLOT_IS_FILLED(poll_map, i)) {
+        if (!mp_map_slot_is_filled(poll_map, i)) {
             continue;
         }
 
@@ -155,7 +155,7 @@ STATIC mp_obj_t select_select(uint n_args, const mp_obj_t *args) {
             list_array[2] = mp_obj_new_list(rwx_len[2], NULL);
             rwx_len[0] = rwx_len[1] = rwx_len[2] = 0;
             for (mp_uint_t i = 0; i < poll_map.alloc; ++i) {
-                if (!MP_MAP_SLOT_IS_FILLED(&poll_map, i)) {
+                if (!mp_map_slot_is_filled(&poll_map, i)) {
                     continue;
                 }
                 poll_obj_t *poll_obj = MP_OBJ_TO_PTR(poll_map.table[i].value);
@@ -266,7 +266,7 @@ STATIC mp_obj_t poll_poll(size_t n_args, const mp_obj_t *args) {
     mp_obj_list_t *ret_list = MP_OBJ_TO_PTR(mp_obj_new_list(n_ready, NULL));
     n_ready = 0;
     for (mp_uint_t i = 0; i < self->poll_map.alloc; ++i) {
-        if (!MP_MAP_SLOT_IS_FILLED(&self->poll_map, i)) {
+        if (!mp_map_slot_is_filled(&self->poll_map, i)) {
             continue;
         }
         poll_obj_t *poll_obj = MP_OBJ_TO_PTR(self->poll_map.table[i].value);
@@ -309,7 +309,7 @@ STATIC mp_obj_t poll_iternext(mp_obj_t self_in) {
 
     for (mp_uint_t i = self->iter_idx; i < self->poll_map.alloc; ++i) {
         self->iter_idx++;
-        if (!MP_MAP_SLOT_IS_FILLED(&self->poll_map, i)) {
+        if (!mp_map_slot_is_filled(&self->poll_map, i)) {
             continue;
         }
         poll_obj_t *poll_obj = MP_OBJ_TO_PTR(self->poll_map.table[i].value);
diff --git a/extmod/modutimeq.c b/extmod/modutimeq.c
index 620e7484b9..26f5a78fae 100644
--- a/extmod/modutimeq.c
+++ b/extmod/modutimeq.c
@@ -145,7 +145,7 @@ STATIC mp_obj_t mod_utimeq_heappop(mp_obj_t heap_in, mp_obj_t list_ref) {
         nlr_raise(mp_obj_new_exception_msg(&mp_type_IndexError, "empty heap"));
     }
     mp_obj_list_t *ret = MP_OBJ_TO_PTR(list_ref);
-    if (!MP_OBJ_IS_TYPE(list_ref, &mp_type_list) || ret->len < 3) {
+    if (!mp_obj_is_type(list_ref, &mp_type_list) || ret->len < 3) {
         mp_raise_TypeError(NULL);
     }
 
diff --git a/extmod/vfs.c b/extmod/vfs.c
index fd7f2a4feb..f99be3098b 100644
--- a/extmod/vfs.c
+++ b/extmod/vfs.c
@@ -227,7 +227,7 @@ mp_obj_t mp_vfs_umount(mp_obj_t mnt_in) {
     mp_vfs_mount_t *vfs = NULL;
     size_t mnt_len;
     const char *mnt_str = NULL;
-    if (MP_OBJ_IS_STR(mnt_in)) {
+    if (mp_obj_is_str(mnt_in)) {
         mnt_str = mp_obj_str_get_data(mnt_in, &mnt_len);
     }
     for (mp_vfs_mount_t **vfsp = &MP_STATE_VM(vfs_mount_table); *vfsp != NULL; vfsp = &(*vfsp)->next) {
@@ -270,7 +270,7 @@ mp_obj_t mp_vfs_open(size_t n_args, const mp_obj_t *pos_args, mp_map_t *kw_args)
 
     #if MICROPY_VFS_POSIX
     // If the file is an integer then delegate straight to the POSIX handler
-    if (MP_OBJ_IS_SMALL_INT(args[ARG_file].u_obj)) {
+    if (mp_obj_is_small_int(args[ARG_file].u_obj)) {
         return mp_vfs_posix_file_open(&mp_type_textio, args[ARG_file].u_obj, args[ARG_mode].u_obj);
     }
     #endif
diff --git a/extmod/vfs_posix.c b/extmod/vfs_posix.c
index 4ca7f9b908..4ef761956c 100644
--- a/extmod/vfs_posix.c
+++ b/extmod/vfs_posix.c
@@ -130,7 +130,7 @@ STATIC mp_obj_t vfs_posix_open(mp_obj_t self_in, mp_obj_t path_in, mp_obj_t mode
         && (strchr(mode, 'w') != NULL || strchr(mode, 'a') != NULL || strchr(mode, '+') != NULL)) {
         mp_raise_OSError(MP_EROFS);
     }
-    if (!MP_OBJ_IS_SMALL_INT(path_in)) {
+    if (!mp_obj_is_small_int(path_in)) {
         path_in = vfs_posix_get_path_obj(self, path_in);
     }
     return mp_vfs_posix_file_open(&mp_type_textio, path_in, mode_in);
diff --git a/extmod/vfs_posix_file.c b/extmod/vfs_posix_file.c
index 435ac65cd4..44cb85dcc7 100644
--- a/extmod/vfs_posix_file.c
+++ b/extmod/vfs_posix_file.c
@@ -94,7 +94,7 @@ mp_obj_t mp_vfs_posix_file_open(const mp_obj_type_t *type, mp_obj_t file_in, mp_
 
     mp_obj_t fid = file_in;
 
-    if (MP_OBJ_IS_SMALL_INT(fid)) {
+    if (mp_obj_is_small_int(fid)) {
         o->fd = MP_OBJ_SMALL_INT_VALUE(fid);
         return MP_OBJ_FROM_PTR(o);
     }