diff --git a/extmod/modujson.c b/extmod/modujson.c
index ea6c8b40f4..80fccc8a11 100644
--- a/extmod/modujson.c
+++ b/extmod/modujson.c
@@ -292,7 +292,7 @@ STATIC mp_obj_t mod_ujson_loads(mp_obj_t obj) {
 STATIC MP_DEFINE_CONST_FUN_OBJ_1(mod_ujson_loads_obj, mod_ujson_loads);
 
 STATIC const mp_rom_map_elem_t mp_module_ujson_globals_table[] = {
-    { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_ujson) },
+    { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_json) },
     { MP_ROM_QSTR(MP_QSTR_dump), MP_ROM_PTR(&mod_ujson_dump_obj) },
     { MP_ROM_QSTR(MP_QSTR_dumps), MP_ROM_PTR(&mod_ujson_dumps_obj) },
     { MP_ROM_QSTR(MP_QSTR_load), MP_ROM_PTR(&mod_ujson_load_obj) },
diff --git a/extmod/modure.c b/extmod/modure.c
index a368ee8fac..6561362a8c 100644
--- a/extmod/modure.c
+++ b/extmod/modure.c
@@ -405,7 +405,7 @@ STATIC MP_DEFINE_CONST_DICT(re_locals_dict, re_locals_dict_table);
 
 STATIC const mp_obj_type_t re_type = {
     { &mp_type_type },
-    .name = MP_QSTR_ure,
+    .name = MP_QSTR_re,
     .print = re_print,
     .locals_dict = (void*)&re_locals_dict,
 };
@@ -462,7 +462,7 @@ MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mod_re_sub_obj, 3, 5, mod_re_sub);
 #endif
 
 STATIC const mp_rom_map_elem_t mp_module_re_globals_table[] = {
-    { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_ure) },
+    { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_re) },
     { MP_ROM_QSTR(MP_QSTR_compile), MP_ROM_PTR(&mod_re_compile_obj) },
     { MP_ROM_QSTR(MP_QSTR_match), MP_ROM_PTR(&mod_re_match_obj) },
     { MP_ROM_QSTR(MP_QSTR_search), MP_ROM_PTR(&mod_re_search_obj) },
diff --git a/py/moduerrno.c b/py/moduerrno.c
index 7ec6699e74..c5daae4687 100644
--- a/py/moduerrno.c
+++ b/py/moduerrno.c
@@ -84,7 +84,7 @@ STATIC const mp_obj_dict_t errorcode_dict = {
 #endif
 
 STATIC const mp_rom_map_elem_t mp_module_uerrno_globals_table[] = {
-    { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_uerrno) },
+    { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_errno) },
     #if MICROPY_PY_UERRNO_ERRORCODE
     { MP_ROM_QSTR(MP_QSTR_errorcode), MP_ROM_PTR(&errorcode_dict) },
     #endif
diff --git a/py/objmodule.c b/py/objmodule.c
index 4ac94311ef..9a56f48516 100644
--- a/py/objmodule.c
+++ b/py/objmodule.c
@@ -149,11 +149,11 @@ STATIC const mp_rom_map_elem_t mp_builtin_module_table[] = {
 #endif
 #if MICROPY_PY_IO
     { MP_ROM_QSTR(MP_QSTR_io), MP_ROM_PTR(&mp_module_io) },
-    { MP_ROM_QSTR(MP_QSTR_uio), MP_ROM_PTR(&mp_module_io) },
 #endif
 #if MICROPY_PY_COLLECTIONS
     { MP_ROM_QSTR(MP_QSTR_collections), MP_ROM_PTR(&mp_module_collections) },
 #endif
+// CircuitPython: Now in shared-bindings/, so not defined here.
 #if MICROPY_PY_STRUCT
     { MP_ROM_QSTR(MP_QSTR_ustruct), MP_ROM_PTR(&mp_module_ustruct) },
 #endif
@@ -179,7 +179,9 @@ STATIC const mp_rom_map_elem_t mp_builtin_module_table[] = {
     // extmod modules
 
 #if MICROPY_PY_UERRNO
-    { MP_ROM_QSTR(MP_QSTR_uerrno), MP_ROM_PTR(&mp_module_uerrno) },
+// CircuitPython: Defined in MICROPY_PORT_BUILTIN_MODULES, so not defined here.
+// TODO: move to shared-bindings/
+//    { MP_ROM_QSTR(MP_QSTR_uerrno), MP_ROM_PTR(&mp_module_uerrno) },
 #endif
 #if MICROPY_PY_UCTYPES
     { MP_ROM_QSTR(MP_QSTR_uctypes), MP_ROM_PTR(&mp_module_uctypes) },
@@ -188,10 +190,14 @@ STATIC const mp_rom_map_elem_t mp_builtin_module_table[] = {
     { MP_ROM_QSTR(MP_QSTR_uzlib), MP_ROM_PTR(&mp_module_uzlib) },
 #endif
 #if MICROPY_PY_UJSON
-    { MP_ROM_QSTR(MP_QSTR_ujson), MP_ROM_PTR(&mp_module_ujson) },
+// CircuitPython: Defined in MICROPY_PORT_BUILTIN_MODULES, so not defined here.
+// TODO: move to shared-bindings/
+//    { MP_ROM_QSTR(MP_QSTR_ujson), MP_ROM_PTR(&mp_module_ujson) },
 #endif
 #if MICROPY_PY_URE
-    { MP_ROM_QSTR(MP_QSTR_ure), MP_ROM_PTR(&mp_module_ure) },
+// CircuitPython: Defined in MICROPY_PORT_BUILTIN_MODULES, so not defined here.
+// TODO: move to shared-bindings/
+//    { MP_ROM_QSTR(MP_QSTR_ure), MP_ROM_PTR(&mp_module_ure) },
 #endif
 #if MICROPY_PY_UHEAPQ
     { MP_ROM_QSTR(MP_QSTR_uheapq), MP_ROM_PTR(&mp_module_uheapq) },