diff --git a/ports/espressif/bindings/espcamera/Camera.c b/ports/espressif/bindings/espcamera/Camera.c
index 5768427a13997..ed6b542a02ff3 100644
--- a/ports/espressif/bindings/espcamera/Camera.c
+++ b/ports/espressif/bindings/espcamera/Camera.c
@@ -18,6 +18,7 @@
 #include "shared-bindings/displayio/Bitmap.h"
 #include "shared-bindings/microcontroller/Pin.h"
 #include "shared-bindings/util.h"
+#include "shared/runtime/context_manager_helpers.h"
 #include "esp_camera.h"
 #include "sensor.h"
 
@@ -169,11 +170,7 @@ static void check_for_deinit(espcamera_camera_obj_t *self) {
 //|         :ref:`lifetime-and-contextmanagers` for more info."""
 //|         ...
 //|
-static mp_obj_t espcamera_camera_obj___exit__(size_t n_args, const mp_obj_t *args) {
-    (void)n_args;
-    return espcamera_camera_deinit(args[0]);
-}
-static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(espcamera_camera___exit___obj, 4, 4, espcamera_camera_obj___exit__);
+//  Provided by context manager helper.
 
 //|     frame_available: bool
 //|     """True if a frame is available, False otherwise"""
@@ -947,8 +944,8 @@ static const mp_rom_map_elem_t espcamera_camera_locals_table[] = {
     { MP_ROM_QSTR(MP_QSTR_denoise), MP_ROM_PTR(&espcamera_camera_denoise_obj) },
     { MP_ROM_QSTR(MP_QSTR_framebuffer_count), MP_ROM_PTR(&espcamera_camera_framebuffer_count_obj) },
     { MP_ROM_QSTR(MP_QSTR___del__), MP_ROM_PTR(&espcamera_camera_deinit_obj) },
-    { MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&mp_identity_obj) },
-    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&espcamera_camera___exit___obj) },
+    { MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&default___enter___obj) },
+    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&default___exit___obj) },
     { MP_ROM_QSTR(MP_QSTR_exposure_ctrl), MP_ROM_PTR(&espcamera_camera_exposure_ctrl_obj) },
     { MP_ROM_QSTR(MP_QSTR_frame_available), MP_ROM_PTR(&espcamera_camera_frame_available_obj) },
     { MP_ROM_QSTR(MP_QSTR_frame_size), MP_ROM_PTR(&espcamera_camera_frame_size_obj) },
diff --git a/ports/espressif/bindings/espnow/ESPNow.c b/ports/espressif/bindings/espnow/ESPNow.c
index 890873573effd..01cc06e3be48e 100644
--- a/ports/espressif/bindings/espnow/ESPNow.c
+++ b/ports/espressif/bindings/espnow/ESPNow.c
@@ -12,6 +12,7 @@
 #include "py/stream.h"
 
 #include "shared-bindings/util.h"
+#include "shared/runtime/context_manager_helpers.h"
 
 #include "bindings/espnow/ESPNow.h"
 #include "bindings/espnow/Peer.h"
@@ -92,11 +93,7 @@ static MP_DEFINE_CONST_FUN_OBJ_1(espnow_deinit_obj, espnow_deinit);
 //|         :ref:`lifetime-and-contextmanagers` for more info."""
 //|         ...
 //|
-static mp_obj_t espnow_obj___exit__(size_t n_args, const mp_obj_t *args) {
-    (void)n_args;
-    return espnow_deinit(args[0]);
-}
-static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(espnow___exit___obj, 4, 4, espnow_obj___exit__);
+//  Provided by context manager helper.
 
 // --- Send and Read messages ---
 
@@ -270,8 +267,8 @@ MP_PROPERTY_GETTER(espnow_peers_obj,
 
 static const mp_rom_map_elem_t espnow_locals_dict_table[] = {
     // Context managers
-    { MP_ROM_QSTR(MP_QSTR___enter__),    MP_ROM_PTR(&mp_identity_obj) },
-    { MP_ROM_QSTR(MP_QSTR___exit__),     MP_ROM_PTR(&espnow___exit___obj) },
+    { MP_ROM_QSTR(MP_QSTR___enter__),    MP_ROM_PTR(&default___enter___obj) },
+    { MP_ROM_QSTR(MP_QSTR___exit__),     MP_ROM_PTR(&default___exit___obj) },
 
     // Deinit the object
     { MP_ROM_QSTR(MP_QSTR_deinit),       MP_ROM_PTR(&espnow_deinit_obj) },
diff --git a/ports/espressif/bindings/espulp/ULP.c b/ports/espressif/bindings/espulp/ULP.c
index dac1ef914a4b9..294678cb1da65 100644
--- a/ports/espressif/bindings/espulp/ULP.c
+++ b/ports/espressif/bindings/espulp/ULP.c
@@ -6,6 +6,7 @@
 
 #include "shared-bindings/microcontroller/Pin.h"
 #include "shared-bindings/util.h"
+#include "shared/runtime/context_manager_helpers.h"
 #include "bindings/espulp/ULP.h"
 
 #include "py/enum.h"
@@ -69,11 +70,7 @@ static MP_DEFINE_CONST_FUN_OBJ_1(espulp_ulp_deinit_obj, espulp_ulp_deinit);
 //|         :ref:`lifetime-and-contextmanagers` for more info."""
 //|         ...
 //|
-static mp_obj_t espulp_ulp_obj___exit__(size_t n_args, const mp_obj_t *args) {
-    (void)n_args;
-    return espulp_ulp_deinit(args[0]);
-}
-static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(espulp_ulp___exit___obj, 4, 4, espulp_ulp_obj___exit__);
+//  Provided by context manager helper.
 
 //|     def set_wakeup_period(self, period_index: int, period_us: int) -> None:
 //|         """Sets the wakeup period for the ULP.
@@ -188,8 +185,8 @@ MP_PROPERTY_GETTER(espulp_ulp_arch_obj,
 
 static const mp_rom_map_elem_t espulp_ulp_locals_table[] = {
     { MP_ROM_QSTR(MP_QSTR_deinit),              MP_ROM_PTR(&espulp_ulp_deinit_obj) },
-    { MP_ROM_QSTR(MP_QSTR___enter__),           MP_ROM_PTR(&mp_identity_obj) },
-    { MP_ROM_QSTR(MP_QSTR___exit__),            MP_ROM_PTR(&espulp_ulp___exit___obj) },
+    { MP_ROM_QSTR(MP_QSTR___enter__),           MP_ROM_PTR(&default___enter___obj) },
+    { MP_ROM_QSTR(MP_QSTR___exit__),            MP_ROM_PTR(&default___exit___obj) },
     { MP_ROM_QSTR(MP_QSTR_set_wakeup_period),   MP_ROM_PTR(&espulp_ulp_set_wakeup_period_obj) },
     { MP_ROM_QSTR(MP_QSTR_run),                 MP_ROM_PTR(&espulp_ulp_run_obj) },
     { MP_ROM_QSTR(MP_QSTR_halt),                MP_ROM_PTR(&espulp_ulp_halt_obj) },
diff --git a/ports/raspberrypi/bindings/rp2pio/StateMachine.c b/ports/raspberrypi/bindings/rp2pio/StateMachine.c
index 7882577f54250..364e9f0461dab 100644
--- a/ports/raspberrypi/bindings/rp2pio/StateMachine.c
+++ b/ports/raspberrypi/bindings/rp2pio/StateMachine.c
@@ -378,12 +378,6 @@ MP_DEFINE_CONST_FUN_OBJ_1(rp2pio_statemachine_deinit_obj, rp2pio_statemachine_ob
 //|         :ref:`lifetime-and-contextmanagers` for more info."""
 //|         ...
 //|
-static mp_obj_t rp2pio_statemachine_obj___exit__(size_t n_args, const mp_obj_t *args) {
-    (void)n_args;
-    common_hal_rp2pio_statemachine_deinit(args[0]);
-    return mp_const_none;
-}
-static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(rp2pio_statemachine_obj___exit___obj, 4, 4, rp2pio_statemachine_obj___exit__);
 
 
 static void check_for_deinit(rp2pio_statemachine_obj_t *self) {
@@ -1126,7 +1120,7 @@ MP_PROPERTY_GETTER(rp2pio_statemachine_last_write_obj,
 static const mp_rom_map_elem_t rp2pio_statemachine_locals_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&rp2pio_statemachine_deinit_obj) },
     { MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&default___enter___obj) },
-    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&rp2pio_statemachine_obj___exit___obj) },
+    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&default___exit___obj) },
 
     { MP_ROM_QSTR(MP_QSTR_stop), MP_ROM_PTR(&rp2pio_statemachine_stop_obj) },
     { MP_ROM_QSTR(MP_QSTR_restart), MP_ROM_PTR(&rp2pio_statemachine_restart_obj) },
diff --git a/ports/zephyr-cp/bindings/zephyr_serial/UART.c b/ports/zephyr-cp/bindings/zephyr_serial/UART.c
index cd0b849b31449..18e8d75141a3f 100644
--- a/ports/zephyr-cp/bindings/zephyr_serial/UART.c
+++ b/ports/zephyr-cp/bindings/zephyr_serial/UART.c
@@ -85,12 +85,7 @@ static void check_for_deinit(zephyr_serial_uart_obj_t *self) {
 //|         :ref:`lifetime-and-contextmanagers` for more info."""
 //|         ...
 //|
-static mp_obj_t _zephyr_serial_uart_obj___exit__(size_t n_args, const mp_obj_t *args) {
-    (void)n_args;
-    zephyr_serial_uart_deinit(MP_OBJ_TO_PTR(args[0]));
-    return mp_const_none;
-}
-static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(_zephyr_serial_uart___exit___obj, 4, 4, _zephyr_serial_uart_obj___exit__);
+//  Provided by context manager helper.
 
 // These are standard stream methods. Code is in py/stream.c.
 //
@@ -259,7 +254,7 @@ static const mp_rom_map_elem_t _zephyr_serial_uart_locals_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR___del__),      MP_ROM_PTR(&_zephyr_serial_uart_deinit_obj) },
     { MP_ROM_QSTR(MP_QSTR_deinit),       MP_ROM_PTR(&_zephyr_serial_uart_deinit_obj) },
     { MP_ROM_QSTR(MP_QSTR___enter__),    MP_ROM_PTR(&default___enter___obj) },
-    { MP_ROM_QSTR(MP_QSTR___exit__),     MP_ROM_PTR(&_zephyr_serial_uart___exit___obj) },
+    { MP_ROM_QSTR(MP_QSTR___exit__),     MP_ROM_PTR(&default___exit___obj) },
 
     // Standard stream methods.
     { MP_OBJ_NEW_QSTR(MP_QSTR_read),     MP_ROM_PTR(&mp_stream_read_obj) },
diff --git a/shared-bindings/analogbufio/BufferedIn.c b/shared-bindings/analogbufio/BufferedIn.c
index 971c744c32d39..9a8483220cda5 100644
--- a/shared-bindings/analogbufio/BufferedIn.c
+++ b/shared-bindings/analogbufio/BufferedIn.c
@@ -91,12 +91,7 @@ static void check_for_deinit(analogbufio_bufferedin_obj_t *self) {
 //|         :ref:`lifetime-and-contextmanagers` for more info."""
 //|         ...
 //|
-static mp_obj_t analogbufio_bufferedin___exit__(size_t n_args, const mp_obj_t *args) {
-    (void)n_args;
-    common_hal_analogbufio_bufferedin_deinit(args[0]);
-    return mp_const_none;
-}
-static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(analogbufio_bufferedin___exit___obj, 4, 4, analogbufio_bufferedin___exit__);
+//  Provided by context manager helper.
 
 //|     def readinto(self, buffer: WriteableBuffer, loop: bool = False) -> int:
 //|         """Fills the provided buffer with ADC voltage values.
@@ -144,7 +139,7 @@ static const mp_rom_map_elem_t analogbufio_bufferedin_locals_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR___del__),    MP_ROM_PTR(&analogbufio_bufferedin_deinit_obj) },
     { MP_ROM_QSTR(MP_QSTR_deinit),     MP_ROM_PTR(&analogbufio_bufferedin_deinit_obj) },
     { MP_ROM_QSTR(MP_QSTR___enter__),  MP_ROM_PTR(&default___enter___obj) },
-    { MP_ROM_QSTR(MP_QSTR___exit__),   MP_ROM_PTR(&analogbufio_bufferedin___exit___obj) },
+    { MP_ROM_QSTR(MP_QSTR___exit__),   MP_ROM_PTR(&default___exit___obj) },
     { MP_ROM_QSTR(MP_QSTR_readinto),   MP_ROM_PTR(&analogbufio_bufferedin_readinto_obj)},
 };
 
diff --git a/shared-bindings/analogio/AnalogIn.c b/shared-bindings/analogio/AnalogIn.c
index b60c58c4929cd..b68b044ab5238 100644
--- a/shared-bindings/analogio/AnalogIn.c
+++ b/shared-bindings/analogio/AnalogIn.c
@@ -87,12 +87,7 @@ static void check_for_deinit(analogio_analogin_obj_t *self) {
 //|         :ref:`lifetime-and-contextmanagers` for more info."""
 //|         ...
 //|
-static mp_obj_t analogio_analogin___exit__(size_t n_args, const mp_obj_t *args) {
-    (void)n_args;
-    common_hal_analogio_analogin_deinit(args[0]);
-    return mp_const_none;
-}
-static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(analogio_analogin___exit___obj, 4, 4, analogio_analogin___exit__);
+//  Provided by context manager helper.
 
 //|     value: int
 //|     """The value on the analog pin between 0 and 65535 inclusive (16-bit). (read-only)
@@ -135,7 +130,7 @@ MP_PROPERTY_GETTER(analogio_analogin_reference_voltage_obj,
 static const mp_rom_map_elem_t analogio_analogin_locals_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_deinit),             MP_ROM_PTR(&analogio_analogin_deinit_obj) },
     { MP_ROM_QSTR(MP_QSTR___enter__),          MP_ROM_PTR(&default___enter___obj) },
-    { MP_ROM_QSTR(MP_QSTR___exit__),           MP_ROM_PTR(&analogio_analogin___exit___obj) },
+    { MP_ROM_QSTR(MP_QSTR___exit__),           MP_ROM_PTR(&default___exit___obj) },
     { MP_ROM_QSTR(MP_QSTR_value),              MP_ROM_PTR(&analogio_analogin_value_obj)},
     { MP_ROM_QSTR(MP_QSTR_reference_voltage),  MP_ROM_PTR(&analogio_analogin_reference_voltage_obj)},
 };
diff --git a/shared-bindings/analogio/AnalogOut.c b/shared-bindings/analogio/AnalogOut.c
index dfb6e42bfe6e6..9e28b78739acf 100644
--- a/shared-bindings/analogio/AnalogOut.c
+++ b/shared-bindings/analogio/AnalogOut.c
@@ -73,12 +73,7 @@ static MP_DEFINE_CONST_FUN_OBJ_1(analogio_analogout_deinit_obj, analogio_analogo
 //|         :ref:`lifetime-and-contextmanagers` for more info."""
 //|         ...
 //|
-static mp_obj_t analogio_analogout___exit__(size_t n_args, const mp_obj_t *args) {
-    (void)n_args;
-    common_hal_analogio_analogout_deinit(args[0]);
-    return mp_const_none;
-}
-static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(analogio_analogout___exit___obj, 4, 4, analogio_analogout___exit__);
+//  Provided by context manager helper.
 
 //|     value: int
 //|     """The value on the analog pin between 0 and 65535 inclusive (16-bit). (write-only)
@@ -105,9 +100,9 @@ MP_PROPERTY_GETSET(analogio_analogout_value_obj,
 
 static const mp_rom_map_elem_t analogio_analogout_locals_dict_table[] = {
     // instance methods
-    { MP_OBJ_NEW_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&analogio_analogout_deinit_obj) },
+    { MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&analogio_analogout_deinit_obj) },
     { MP_ROM_QSTR(MP_QSTR___enter__),  MP_ROM_PTR(&default___enter___obj) },
-    { MP_ROM_QSTR(MP_QSTR___exit__),   MP_ROM_PTR(&analogio_analogout___exit___obj) },
+    { MP_ROM_QSTR(MP_QSTR___exit__),   MP_ROM_PTR(&default___exit___obj) },
 
     // Properties
     { MP_OBJ_NEW_QSTR(MP_QSTR_value), (mp_obj_t)&analogio_analogout_value_obj },
diff --git a/shared-bindings/audiobusio/I2SOut.c b/shared-bindings/audiobusio/I2SOut.c
index 7b7d0b172c290..9aaf7421c653c 100644
--- a/shared-bindings/audiobusio/I2SOut.c
+++ b/shared-bindings/audiobusio/I2SOut.c
@@ -135,12 +135,7 @@ static void check_for_deinit(audiobusio_i2sout_obj_t *self) {
 //|         :ref:`lifetime-and-contextmanagers` for more info."""
 //|         ...
 //|
-static mp_obj_t audiobusio_i2sout_obj___exit__(size_t n_args, const mp_obj_t *args) {
-    (void)n_args;
-    common_hal_audiobusio_i2sout_deinit(args[0]);
-    return mp_const_none;
-}
-static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(audiobusio_i2sout___exit___obj, 4, 4, audiobusio_i2sout_obj___exit__);
+//  Provided by context manager helper.
 
 
 //|     def play(self, sample: circuitpython_typing.AudioSample, *, loop: bool = False) -> None:
@@ -248,7 +243,7 @@ static const mp_rom_map_elem_t audiobusio_i2sout_locals_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR___del__), MP_ROM_PTR(&audiobusio_i2sout_deinit_obj) },
     { MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&audiobusio_i2sout_deinit_obj) },
     { MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&default___enter___obj) },
-    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&audiobusio_i2sout___exit___obj) },
+    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&default___exit___obj) },
     { MP_ROM_QSTR(MP_QSTR_play), MP_ROM_PTR(&audiobusio_i2sout_play_obj) },
     { MP_ROM_QSTR(MP_QSTR_stop), MP_ROM_PTR(&audiobusio_i2sout_stop_obj) },
     { MP_ROM_QSTR(MP_QSTR_pause), MP_ROM_PTR(&audiobusio_i2sout_pause_obj) },
diff --git a/shared-bindings/audiobusio/PDMIn.c b/shared-bindings/audiobusio/PDMIn.c
index b681263882a46..2a3fd3540c38f 100644
--- a/shared-bindings/audiobusio/PDMIn.c
+++ b/shared-bindings/audiobusio/PDMIn.c
@@ -152,12 +152,7 @@ static void check_for_deinit(audiobusio_pdmin_obj_t *self) {
 //|         """Automatically deinitializes the hardware when exiting a context."""
 //|         ...
 //|
-static mp_obj_t audiobusio_pdmin_obj___exit__(size_t n_args, const mp_obj_t *args) {
-    (void)n_args;
-    common_hal_audiobusio_pdmin_deinit(args[0]);
-    return mp_const_none;
-}
-static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(audiobusio_pdmin___exit___obj, 4, 4, audiobusio_pdmin_obj___exit__);
+//  Provided by context manager helper.
 
 
 //|     def record(self, destination: WriteableBuffer, destination_length: int) -> None:
@@ -220,7 +215,7 @@ static const mp_rom_map_elem_t audiobusio_pdmin_locals_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR___del__), MP_ROM_PTR(&audiobusio_pdmin_deinit_obj) },
     { MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&audiobusio_pdmin_deinit_obj) },
     { MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&default___enter___obj) },
-    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&audiobusio_pdmin___exit___obj) },
+    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&default___exit___obj) },
     { MP_ROM_QSTR(MP_QSTR_record), MP_ROM_PTR(&audiobusio_pdmin_record_obj) },
     { MP_ROM_QSTR(MP_QSTR_sample_rate), MP_ROM_PTR(&audiobusio_pdmin_sample_rate_obj) }
 };
diff --git a/shared-bindings/audiocore/RawSample.c b/shared-bindings/audiocore/RawSample.c
index 7036ca9a40f6a..30c1d1ad600d3 100644
--- a/shared-bindings/audiocore/RawSample.c
+++ b/shared-bindings/audiocore/RawSample.c
@@ -132,12 +132,7 @@ static MP_DEFINE_CONST_FUN_OBJ_1(audioio_rawsample_deinit_obj, audioio_rawsample
 //|         :ref:`lifetime-and-contextmanagers` for more info."""
 //|         ...
 //|
-static mp_obj_t audioio_rawsample_obj___exit__(size_t n_args, const mp_obj_t *args) {
-    (void)n_args;
-    common_hal_audioio_rawsample_deinit(args[0]);
-    return mp_const_none;
-}
-static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(audioio_rawsample___exit___obj, 4, 4, audioio_rawsample_obj___exit__);
+//  Provided by context manager helper.
 
 //|     sample_rate: Optional[int]
 //|     """32 bit value that dictates how quickly samples are played in Hertz (cycles per second).
@@ -151,7 +146,7 @@ static const mp_rom_map_elem_t audioio_rawsample_locals_dict_table[] = {
     // Methods
     { MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&audioio_rawsample_deinit_obj) },
     { MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&default___enter___obj) },
-    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&audioio_rawsample___exit___obj) },
+    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&default___exit___obj) },
 
     // Properties
     AUDIOSAMPLE_FIELDS,
diff --git a/shared-bindings/audiocore/WaveFile.c b/shared-bindings/audiocore/WaveFile.c
index c88f8b7622eb6..4ba7d24bfd2c5 100644
--- a/shared-bindings/audiocore/WaveFile.c
+++ b/shared-bindings/audiocore/WaveFile.c
@@ -100,12 +100,7 @@ static MP_DEFINE_CONST_FUN_OBJ_1(audioio_wavefile_deinit_obj, audioio_wavefile_d
 //|         :ref:`lifetime-and-contextmanagers` for more info."""
 //|         ...
 //|
-static mp_obj_t audioio_wavefile_obj___exit__(size_t n_args, const mp_obj_t *args) {
-    (void)n_args;
-    common_hal_audioio_wavefile_deinit(args[0]);
-    return mp_const_none;
-}
-static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(audioio_wavefile___exit___obj, 4, 4, audioio_wavefile_obj___exit__);
+//  Provided by context manager helper.
 
 //|     sample_rate: int
 //|     """32 bit value that dictates how quickly samples are loaded into the DAC
@@ -124,7 +119,7 @@ static const mp_rom_map_elem_t audioio_wavefile_locals_dict_table[] = {
     // Methods
     { MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&audioio_wavefile_deinit_obj) },
     { MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&default___enter___obj) },
-    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&audioio_wavefile___exit___obj) },
+    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&default___exit___obj) },
 
     // Properties
     AUDIOSAMPLE_FIELDS,
diff --git a/shared-bindings/audiodelays/Echo.c b/shared-bindings/audiodelays/Echo.c
index f867bd361c080..71e533055573f 100644
--- a/shared-bindings/audiodelays/Echo.c
+++ b/shared-bindings/audiodelays/Echo.c
@@ -137,12 +137,7 @@ static void check_for_deinit(audiodelays_echo_obj_t *self) {
 //|         :ref:`lifetime-and-contextmanagers` for more info."""
 //|         ...
 //|
-static mp_obj_t audiodelays_echo_obj___exit__(size_t n_args, const mp_obj_t *args) {
-    (void)n_args;
-    common_hal_audiodelays_echo_deinit(args[0]);
-    return mp_const_none;
-}
-static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(audiodelays_echo___exit___obj, 4, 4, audiodelays_echo_obj___exit__);
+//  Provided by context manager helper.
 
 
 //|     delay_ms: synthio.BlockInput
@@ -281,7 +276,7 @@ static const mp_rom_map_elem_t audiodelays_echo_locals_dict_table[] = {
     // Methods
     { MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&audiodelays_echo_deinit_obj) },
     { MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&default___enter___obj) },
-    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&audiodelays_echo___exit___obj) },
+    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&default___exit___obj) },
     { MP_ROM_QSTR(MP_QSTR_play), MP_ROM_PTR(&audiodelays_echo_play_obj) },
     { MP_ROM_QSTR(MP_QSTR_stop), MP_ROM_PTR(&audiodelays_echo_stop_obj) },
 
diff --git a/shared-bindings/audiofilters/Distortion.c b/shared-bindings/audiofilters/Distortion.c
index d89a7e72a4453..cb888d0c71b7b 100644
--- a/shared-bindings/audiofilters/Distortion.c
+++ b/shared-bindings/audiofilters/Distortion.c
@@ -176,12 +176,7 @@ static void check_for_deinit(audiofilters_distortion_obj_t *self) {
 //|         :ref:`lifetime-and-contextmanagers` for more info."""
 //|         ...
 //|
-static mp_obj_t audiofilters_distortion_obj___exit__(size_t n_args, const mp_obj_t *args) {
-    (void)n_args;
-    common_hal_audiofilters_distortion_deinit(args[0]);
-    return mp_const_none;
-}
-static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(audiofilters_distortion___exit___obj, 4, 4, audiofilters_distortion_obj___exit__);
+//  Provided by context manager helper.
 
 
 //|     drive: synthio.BlockInput
@@ -357,7 +352,7 @@ static const mp_rom_map_elem_t audiofilters_distortion_locals_dict_table[] = {
     // Methods
     { MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&audiofilters_distortion_deinit_obj) },
     { MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&default___enter___obj) },
-    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&audiofilters_distortion___exit___obj) },
+    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&default___exit___obj) },
     { MP_ROM_QSTR(MP_QSTR_play), MP_ROM_PTR(&audiofilters_distortion_play_obj) },
     { MP_ROM_QSTR(MP_QSTR_stop), MP_ROM_PTR(&audiofilters_distortion_stop_obj) },
 
diff --git a/shared-bindings/audiofilters/Filter.c b/shared-bindings/audiofilters/Filter.c
index 8a5f51fd1d560..900fff68d3c89 100644
--- a/shared-bindings/audiofilters/Filter.c
+++ b/shared-bindings/audiofilters/Filter.c
@@ -124,12 +124,7 @@ static void check_for_deinit(audiofilters_filter_obj_t *self) {
 //|         :ref:`lifetime-and-contextmanagers` for more info."""
 //|         ...
 //|
-static mp_obj_t audiofilters_filter_obj___exit__(size_t n_args, const mp_obj_t *args) {
-    (void)n_args;
-    common_hal_audiofilters_filter_deinit(args[0]);
-    return mp_const_none;
-}
-static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(audiofilters_filter___exit___obj, 4, 4, audiofilters_filter_obj___exit__);
+//  Provided by context manager helper.
 
 
 //|     filter: synthio.Biquad | Tuple[synthio.Biquad] | None
@@ -229,7 +224,7 @@ static const mp_rom_map_elem_t audiofilters_filter_locals_dict_table[] = {
     // Methods
     { MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&audiofilters_filter_deinit_obj) },
     { MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&default___enter___obj) },
-    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&audiofilters_filter___exit___obj) },
+    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&default___exit___obj) },
     { MP_ROM_QSTR(MP_QSTR_play), MP_ROM_PTR(&audiofilters_filter_play_obj) },
     { MP_ROM_QSTR(MP_QSTR_stop), MP_ROM_PTR(&audiofilters_filter_stop_obj) },
 
diff --git a/shared-bindings/audioio/AudioOut.c b/shared-bindings/audioio/AudioOut.c
index 82ad7e6f3e2b0..1bfc51cb9ab27 100644
--- a/shared-bindings/audioio/AudioOut.c
+++ b/shared-bindings/audioio/AudioOut.c
@@ -124,13 +124,7 @@ static void check_for_deinit(audioio_audioout_obj_t *self) {
 //|         :ref:`lifetime-and-contextmanagers` for more info."""
 //|         ...
 //|
-static mp_obj_t audioio_audioout_obj___exit__(size_t n_args, const mp_obj_t *args) {
-    (void)n_args;
-    common_hal_audioio_audioout_deinit(args[0]);
-    return mp_const_none;
-}
-static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(audioio_audioout___exit___obj, 4, 4, audioio_audioout_obj___exit__);
-
+//  Provided by context manager helper.
 
 //|     def play(self, sample: circuitpython_typing.AudioSample, *, loop: bool = False) -> None:
 //|         """Plays the sample once when loop=False and continuously when loop=True.
@@ -237,7 +231,7 @@ static const mp_rom_map_elem_t audioio_audioout_locals_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR___del__), MP_ROM_PTR(&audioio_audioout_deinit_obj) },
     { MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&audioio_audioout_deinit_obj) },
     { MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&default___enter___obj) },
-    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&audioio_audioout___exit___obj) },
+    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&default___exit___obj) },
     { MP_ROM_QSTR(MP_QSTR_play), MP_ROM_PTR(&audioio_audioout_play_obj) },
     { MP_ROM_QSTR(MP_QSTR_stop), MP_ROM_PTR(&audioio_audioout_stop_obj) },
     { MP_ROM_QSTR(MP_QSTR_pause), MP_ROM_PTR(&audioio_audioout_pause_obj) },
diff --git a/shared-bindings/audiomixer/Mixer.c b/shared-bindings/audiomixer/Mixer.c
index 633d362b3f4e3..dda6d06bd500c 100644
--- a/shared-bindings/audiomixer/Mixer.c
+++ b/shared-bindings/audiomixer/Mixer.c
@@ -123,12 +123,7 @@ static void check_for_deinit(audiomixer_mixer_obj_t *self) {
 //|         :ref:`lifetime-and-contextmanagers` for more info."""
 //|         ...
 //|
-static mp_obj_t audiomixer_mixer_obj___exit__(size_t n_args, const mp_obj_t *args) {
-    (void)n_args;
-    common_hal_audiomixer_mixer_deinit(args[0]);
-    return mp_const_none;
-}
-static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(audiomixer_mixer___exit___obj, 4, 4, audiomixer_mixer_obj___exit__);
+//  Provided by context manager helper.
 
 //|     playing: bool
 //|     """True when any voice is being output. (read-only)"""
@@ -228,7 +223,7 @@ static const mp_rom_map_elem_t audiomixer_mixer_locals_dict_table[] = {
     // Methods
     { MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&audiomixer_mixer_deinit_obj) },
     { MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&default___enter___obj) },
-    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&audiomixer_mixer___exit___obj) },
+    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&default___exit___obj) },
     { MP_ROM_QSTR(MP_QSTR_play), MP_ROM_PTR(&audiomixer_mixer_play_obj) },
     { MP_ROM_QSTR(MP_QSTR_stop_voice), MP_ROM_PTR(&audiomixer_mixer_stop_voice_obj) },
 
diff --git a/shared-bindings/audiomp3/MP3Decoder.c b/shared-bindings/audiomp3/MP3Decoder.c
index 9ea5fa62e4c52..ff6c77e85726b 100644
--- a/shared-bindings/audiomp3/MP3Decoder.c
+++ b/shared-bindings/audiomp3/MP3Decoder.c
@@ -137,12 +137,7 @@ static void check_for_deinit(audiomp3_mp3file_obj_t *self) {
 //|         :ref:`lifetime-and-contextmanagers` for more info."""
 //|         ...
 //|
-static mp_obj_t audiomp3_mp3file_obj___exit__(size_t n_args, const mp_obj_t *args) {
-    (void)n_args;
-    common_hal_audiomp3_mp3file_deinit(args[0]);
-    return mp_const_none;
-}
-static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(audiomp3_mp3file___exit___obj, 4, 4, audiomp3_mp3file_obj___exit__);
+//  Provided by context manager helper.
 
 //|     file: typing.BinaryIO
 //|     """File to play back."""
@@ -231,7 +226,7 @@ static const mp_rom_map_elem_t audiomp3_mp3file_locals_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&audiomp3_mp3file_deinit_obj) },
     { MP_ROM_QSTR(MP_QSTR___del__), MP_ROM_PTR(&audiomp3_mp3file_deinit_obj) },
     { MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&default___enter___obj) },
-    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&audiomp3_mp3file___exit___obj) },
+    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&default___exit___obj) },
 
     // Properties
     { MP_ROM_QSTR(MP_QSTR_file), MP_ROM_PTR(&audiomp3_mp3file_file_obj) },
diff --git a/shared-bindings/audiopwmio/PWMAudioOut.c b/shared-bindings/audiopwmio/PWMAudioOut.c
index 5078c54e003b4..3c96143364183 100644
--- a/shared-bindings/audiopwmio/PWMAudioOut.c
+++ b/shared-bindings/audiopwmio/PWMAudioOut.c
@@ -133,12 +133,7 @@ static void check_for_deinit(audiopwmio_pwmaudioout_obj_t *self) {
 //|         :ref:`lifetime-and-contextmanagers` for more info."""
 //|         ...
 //|
-static mp_obj_t audiopwmio_pwmaudioout_obj___exit__(size_t n_args, const mp_obj_t *args) {
-    (void)n_args;
-    common_hal_audiopwmio_pwmaudioout_deinit(args[0]);
-    return mp_const_none;
-}
-static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(audiopwmio_pwmaudioout___exit___obj, 4, 4, audiopwmio_pwmaudioout_obj___exit__);
+//  Provided by context manager helper.
 
 
 //|     def play(self, sample: circuitpython_typing.AudioSample, *, loop: bool = False) -> None:
@@ -245,7 +240,7 @@ static const mp_rom_map_elem_t audiopwmio_pwmaudioout_locals_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&audiopwmio_pwmaudioout_deinit_obj) },
     { MP_ROM_QSTR(MP_QSTR___del__), MP_ROM_PTR(&audiopwmio_pwmaudioout_deinit_obj) },
     { MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&default___enter___obj) },
-    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&audiopwmio_pwmaudioout___exit___obj) },
+    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&default___exit___obj) },
     { MP_ROM_QSTR(MP_QSTR_play), MP_ROM_PTR(&audiopwmio_pwmaudioout_play_obj) },
     { MP_ROM_QSTR(MP_QSTR_stop), MP_ROM_PTR(&audiopwmio_pwmaudioout_stop_obj) },
     { MP_ROM_QSTR(MP_QSTR_pause), MP_ROM_PTR(&audiopwmio_pwmaudioout_pause_obj) },
diff --git a/shared-bindings/bitbangio/I2C.c b/shared-bindings/bitbangio/I2C.c
index f219144c60df2..d1a200d39b52f 100644
--- a/shared-bindings/bitbangio/I2C.c
+++ b/shared-bindings/bitbangio/I2C.c
@@ -93,12 +93,7 @@ static void check_for_deinit(bitbangio_i2c_obj_t *self) {
 //|         :ref:`lifetime-and-contextmanagers` for more info."""
 //|         ...
 //|
-static mp_obj_t bitbangio_i2c_obj___exit__(size_t n_args, const mp_obj_t *args) {
-    (void)n_args;
-    shared_module_bitbangio_i2c_deinit(args[0]);
-    return mp_const_none;
-}
-static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(bitbangio_i2c_obj___exit___obj, 4, 4, bitbangio_i2c_obj___exit__);
+//  Provided by context manager helper.
 
 static void check_lock(bitbangio_i2c_obj_t *self) {
     if (!shared_module_bitbangio_i2c_has_lock(self)) {
@@ -360,7 +355,7 @@ MP_DEFINE_CONST_FUN_OBJ_KW(bitbangio_i2c_writeto_then_readfrom_obj, 1, bitbangio
 static const mp_rom_map_elem_t bitbangio_i2c_locals_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&bitbangio_i2c_deinit_obj) },
     { MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&default___enter___obj) },
-    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&bitbangio_i2c_obj___exit___obj) },
+    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&default___exit___obj) },
     { MP_ROM_QSTR(MP_QSTR_probe), MP_ROM_PTR(&bitbangio_i2c_probe_obj) },
     { MP_ROM_QSTR(MP_QSTR_scan), MP_ROM_PTR(&bitbangio_i2c_scan_obj) },
 
diff --git a/shared-bindings/bitbangio/SPI.c b/shared-bindings/bitbangio/SPI.c
index 2ea13ad2b73da..8938ae4898d56 100644
--- a/shared-bindings/bitbangio/SPI.c
+++ b/shared-bindings/bitbangio/SPI.c
@@ -102,12 +102,7 @@ static void check_for_deinit(bitbangio_spi_obj_t *self) {
 //|         :ref:`lifetime-and-contextmanagers` for more info."""
 //|         ...
 //|
-static mp_obj_t bitbangio_spi_obj___exit__(size_t n_args, const mp_obj_t *args) {
-    (void)n_args;
-    shared_module_bitbangio_spi_deinit(args[0]);
-    return mp_const_none;
-}
-static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(bitbangio_spi_obj___exit___obj, 4, 4, bitbangio_spi_obj___exit__);
+//  Provided by context manager helper.
 
 
 static void check_lock(bitbangio_spi_obj_t *self) {
@@ -391,7 +386,7 @@ MP_DEFINE_CONST_FUN_OBJ_KW(bitbangio_spi_write_readinto_obj, 1, bitbangio_spi_wr
 static const mp_rom_map_elem_t bitbangio_spi_locals_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&bitbangio_spi_deinit_obj) },
     { MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&default___enter___obj) },
-    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&bitbangio_spi_obj___exit___obj) },
+    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&default___exit___obj) },
 
     { MP_ROM_QSTR(MP_QSTR_configure), MP_ROM_PTR(&bitbangio_spi_configure_obj) },
     { MP_ROM_QSTR(MP_QSTR_try_lock), MP_ROM_PTR(&bitbangio_spi_try_lock_obj) },
diff --git a/shared-bindings/busio/I2C.c b/shared-bindings/busio/I2C.c
index 12c6ce4cbf4c4..1b26a5659abc1 100644
--- a/shared-bindings/busio/I2C.c
+++ b/shared-bindings/busio/I2C.c
@@ -100,12 +100,7 @@ static void check_for_deinit(busio_i2c_obj_t *self) {
 //|         :ref:`lifetime-and-contextmanagers` for more info."""
 //|         ...
 //|
-static mp_obj_t busio_i2c_obj___exit__(size_t n_args, const mp_obj_t *args) {
-    (void)n_args;
-    common_hal_busio_i2c_deinit(MP_OBJ_TO_PTR(args[0]));
-    return mp_const_none;
-}
-static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(busio_i2c___exit___obj, 4, 4, busio_i2c_obj___exit__);
+//  Provided by context manager helper.
 
 static void check_lock(busio_i2c_obj_t *self) {
     asm ("");
@@ -395,7 +390,7 @@ static const mp_rom_map_elem_t busio_i2c_locals_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&busio_i2c_deinit_obj) },
     { MP_ROM_QSTR(MP_QSTR___del__), MP_ROM_PTR(&busio_i2c_deinit_obj) },
     { MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&default___enter___obj) },
-    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&busio_i2c___exit___obj) },
+    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&default___exit___obj) },
     { MP_ROM_QSTR(MP_QSTR_probe), MP_ROM_PTR(&busio_i2c_probe_obj) },
     { MP_ROM_QSTR(MP_QSTR_scan), MP_ROM_PTR(&busio_i2c_scan_obj) },
 
diff --git a/shared-bindings/busio/SPI.c b/shared-bindings/busio/SPI.c
index 375da6fb65e09..f54c039658868 100644
--- a/shared-bindings/busio/SPI.c
+++ b/shared-bindings/busio/SPI.c
@@ -135,12 +135,7 @@ MP_DEFINE_CONST_FUN_OBJ_1(busio_spi_deinit_obj, busio_spi_obj_deinit);
 //|         :ref:`lifetime-and-contextmanagers` for more info."""
 //|         ...
 //|
-static mp_obj_t busio_spi_obj___exit__(size_t n_args, const mp_obj_t *args) {
-    (void)n_args;
-    common_hal_busio_spi_deinit(MP_OBJ_TO_PTR(args[0]));
-    return mp_const_none;
-}
-static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(busio_spi_obj___exit___obj, 4, 4, busio_spi_obj___exit__);
+//  Provided by context manager helper.
 
 static void check_lock(busio_spi_obj_t *self) {
     asm ("");
@@ -469,7 +464,7 @@ static const mp_rom_map_elem_t busio_spi_locals_dict_table[] = {
     #if CIRCUITPY_BUSIO_SPI
     { MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&busio_spi_deinit_obj) },
     { MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&default___enter___obj) },
-    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&busio_spi_obj___exit___obj) },
+    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&default___exit___obj) },
 
     { MP_ROM_QSTR(MP_QSTR_configure), MP_ROM_PTR(&busio_spi_configure_obj) },
     { MP_ROM_QSTR(MP_QSTR_try_lock), MP_ROM_PTR(&busio_spi_try_lock_obj) },
diff --git a/shared-bindings/busio/UART.c b/shared-bindings/busio/UART.c
index 49809abf852ad..2c52ccbe325e7 100644
--- a/shared-bindings/busio/UART.c
+++ b/shared-bindings/busio/UART.c
@@ -204,12 +204,7 @@ static void check_for_deinit(busio_uart_obj_t *self) {
 //|         :ref:`lifetime-and-contextmanagers` for more info."""
 //|         ...
 //|
-static mp_obj_t busio_uart_obj___exit__(size_t n_args, const mp_obj_t *args) {
-    (void)n_args;
-    common_hal_busio_uart_deinit(MP_OBJ_TO_PTR(args[0]));
-    return mp_const_none;
-}
-static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(busio_uart___exit___obj, 4, 4, busio_uart_obj___exit__);
+//  Provided by context manager helper.
 
 // These are standard stream methods. Code is in py/stream.c.
 //
@@ -422,7 +417,7 @@ static const mp_rom_map_elem_t busio_uart_locals_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR___del__),      MP_ROM_PTR(&busio_uart_deinit_obj) },
     { MP_ROM_QSTR(MP_QSTR_deinit),       MP_ROM_PTR(&busio_uart_deinit_obj) },
     { MP_ROM_QSTR(MP_QSTR___enter__),    MP_ROM_PTR(&default___enter___obj) },
-    { MP_ROM_QSTR(MP_QSTR___exit__),     MP_ROM_PTR(&busio_uart___exit___obj) },
+    { MP_ROM_QSTR(MP_QSTR___exit__),     MP_ROM_PTR(&default___exit___obj) },
 
     // Standard stream methods.
     { MP_OBJ_NEW_QSTR(MP_QSTR_read),     MP_ROM_PTR(&mp_stream_read_obj) },
diff --git a/shared-bindings/countio/Counter.c b/shared-bindings/countio/Counter.c
index 2a3c3415a2858..c2e3ddc740495 100644
--- a/shared-bindings/countio/Counter.c
+++ b/shared-bindings/countio/Counter.c
@@ -98,12 +98,7 @@ static void check_for_deinit(countio_counter_obj_t *self) {
 //|         """Automatically deinitializes the hardware when exiting a context. See
 //|         :ref:`lifetime-and-contextmanagers` for more info."""
 //|
-static mp_obj_t countio_counter_obj___exit__(size_t n_args, const mp_obj_t *args) {
-    (void)n_args;
-    common_hal_countio_counter_deinit(args[0]);
-    return mp_const_none;
-}
-static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(countio_counter___exit___obj, 4, 4, countio_counter_obj___exit__);
+//  Provided by context manager helper.
 
 
 //|     count: int
@@ -149,7 +144,7 @@ static const mp_rom_map_elem_t countio_counter_locals_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&countio_counter_deinit_obj) },
     { MP_ROM_QSTR(MP_QSTR___del__), MP_ROM_PTR(&countio_counter_deinit_obj) },
     { MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&default___enter___obj) },
-    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&countio_counter___exit___obj) },
+    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&default___exit___obj) },
     { MP_ROM_QSTR(MP_QSTR_count), MP_ROM_PTR(&countio_counter_count_obj) },
     { MP_ROM_QSTR(MP_QSTR_reset), MP_ROM_PTR(&countio_counter_reset_obj) },
 };
diff --git a/shared-bindings/digitalio/DigitalInOut.c b/shared-bindings/digitalio/DigitalInOut.c
index 43d389ca05734..a29fdcc371ca9 100644
--- a/shared-bindings/digitalio/DigitalInOut.c
+++ b/shared-bindings/digitalio/DigitalInOut.c
@@ -100,12 +100,7 @@ MP_DEFINE_CONST_FUN_OBJ_1(digitalio_digitalinout_deinit_obj, digitalio_digitalin
 //|         :ref:`lifetime-and-contextmanagers` for more info."""
 //|         ...
 //|
-static mp_obj_t digitalio_digitalinout_obj___exit__(size_t n_args, const mp_obj_t *args) {
-    (void)n_args;
-    common_hal_digitalio_digitalinout_deinit(MP_OBJ_TO_PTR(args[0]));
-    return mp_const_none;
-}
-static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(digitalio_digitalinout_obj___exit___obj, 4, 4, digitalio_digitalinout_obj___exit__);
+//  Provided by context manager helper.
 
 static inline void check_for_deinit(digitalio_digitalinout_obj_t *self) {
     if (common_hal_digitalio_digitalinout_deinited(self)) {
@@ -333,7 +328,7 @@ static const mp_rom_map_elem_t digitalio_digitalinout_locals_dict_table[] = {
     // instance methods
     { MP_ROM_QSTR(MP_QSTR_deinit),             MP_ROM_PTR(&digitalio_digitalinout_deinit_obj) },
     { MP_ROM_QSTR(MP_QSTR___enter__),          MP_ROM_PTR(&default___enter___obj) },
-    { MP_ROM_QSTR(MP_QSTR___exit__),           MP_ROM_PTR(&digitalio_digitalinout_obj___exit___obj) },
+    { MP_ROM_QSTR(MP_QSTR___exit__),           MP_ROM_PTR(&default___exit___obj) },
     { MP_ROM_QSTR(MP_QSTR_switch_to_output),   MP_ROM_PTR(&digitalio_digitalinout_switch_to_output_obj) },
     { MP_ROM_QSTR(MP_QSTR_switch_to_input),    MP_ROM_PTR(&digitalio_digitalinout_switch_to_input_obj) },
 
diff --git a/shared-bindings/frequencyio/FrequencyIn.c b/shared-bindings/frequencyio/FrequencyIn.c
index 6ab896646804b..d742655b11d3c 100644
--- a/shared-bindings/frequencyio/FrequencyIn.c
+++ b/shared-bindings/frequencyio/FrequencyIn.c
@@ -99,12 +99,7 @@ static void check_for_deinit(frequencyio_frequencyin_obj_t *self) {
 //|         :ref:`lifetime-and-contextmanagers` for more info."""
 //|         ...
 //|
-static mp_obj_t frequencyio_frequencyin_obj___exit__(size_t n_args, const mp_obj_t *args) {
-    (void)n_args;
-    common_hal_frequencyio_frequencyin_deinit(args[0]);
-    return mp_const_none;
-}
-static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(frequencyio_frequencyin___exit___obj, 4, 4, frequencyio_frequencyin_obj___exit__);
+//  Provided by context manager helper.
 
 //|     def pause(self) -> None:
 //|         """Pause frequency capture."""
@@ -197,7 +192,7 @@ static const mp_rom_map_elem_t frequencyio_frequencyin_locals_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&frequencyio_frequencyin_deinit_obj) },
     { MP_ROM_QSTR(MP_QSTR___del__), MP_ROM_PTR(&frequencyio_frequencyin_deinit_obj) },
     { MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&default___enter___obj) },
-    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&frequencyio_frequencyin___exit___obj) },
+    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&default___exit___obj) },
     { MP_ROM_QSTR(MP_QSTR_value), MP_ROM_PTR(&frequencyio_frequencyin_value_obj) },
     { MP_ROM_QSTR(MP_QSTR_pause), MP_ROM_PTR(&frequencyio_frequencyin_pause_obj) },
     { MP_ROM_QSTR(MP_QSTR_resume), MP_ROM_PTR(&frequencyio_frequencyin_resume_obj) },
diff --git a/shared-bindings/gifio/GifWriter.c b/shared-bindings/gifio/GifWriter.c
index 79f65404cb553..f649a9299c0a8 100644
--- a/shared-bindings/gifio/GifWriter.c
+++ b/shared-bindings/gifio/GifWriter.c
@@ -136,7 +136,7 @@ MP_DEFINE_CONST_FUN_OBJ_KW(gifio_gifwriter_add_frame_obj, 1, gifio_gifwriter_add
 static const mp_rom_map_elem_t gifio_gifwriter_locals_table[] = {
     { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_GifWriter) },
     { MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&default___enter___obj) },
-    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&gifio_gifwriter___exit___obj) },
+    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&default___exit___obj) },
     { MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&gifio_gifwriter_deinit_obj) },
     { MP_ROM_QSTR(MP_QSTR_add_frame), MP_ROM_PTR(&gifio_gifwriter_add_frame_obj) },
 };
diff --git a/shared-bindings/gifio/OnDiskGif.c b/shared-bindings/gifio/OnDiskGif.c
index 5d2001eec8358..092d9dd19cf7d 100644
--- a/shared-bindings/gifio/OnDiskGif.c
+++ b/shared-bindings/gifio/OnDiskGif.c
@@ -144,12 +144,7 @@ static void check_for_deinit(gifio_ondiskgif_t *self) {
 //|         :ref:`lifetime-and-contextmanagers` for more info."""
 //|         ...
 //|
-static mp_obj_t gifio_ondiskgif_obj___exit__(size_t n_args, const mp_obj_t *args) {
-    (void)n_args;
-    common_hal_gifio_ondiskgif_deinit(args[0]);
-    return mp_const_none;
-}
-static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(gifio_ondiskgif___exit___obj, 4, 4, gifio_ondiskgif_obj___exit__);
+//  Provided by context manager helper.
 
 //|     width: int
 //|     """Width of the gif. (read only)"""
@@ -293,7 +288,7 @@ MP_DEFINE_CONST_FUN_OBJ_1(gifio_ondiskgif_deinit_obj, gifio_ondiskgif_obj_deinit
 static const mp_rom_map_elem_t gifio_ondiskgif_locals_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&gifio_ondiskgif_deinit_obj) },
     { MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&default___enter___obj) },
-    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&gifio_ondiskgif___exit___obj) },
+    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&default___exit___obj) },
     { MP_ROM_QSTR(MP_QSTR_height), MP_ROM_PTR(&gifio_ondiskgif_height_obj) },
     { MP_ROM_QSTR(MP_QSTR_bitmap), MP_ROM_PTR(&gifio_ondiskgif_bitmap_obj) },
     { MP_ROM_QSTR(MP_QSTR_palette), MP_ROM_PTR(&gifio_ondiskgif_palette_obj) },
diff --git a/shared-bindings/i2ctarget/I2CTarget.c b/shared-bindings/i2ctarget/I2CTarget.c
index b2a1ea03f4a2c..728d9f60e2712 100644
--- a/shared-bindings/i2ctarget/I2CTarget.c
+++ b/shared-bindings/i2ctarget/I2CTarget.c
@@ -110,12 +110,7 @@ static void check_for_deinit(i2ctarget_i2c_target_obj_t *self) {
 //|         :ref:`lifetime-and-contextmanagers` for more info."""
 //|         ...
 //|
-static mp_obj_t i2ctarget_i2c_target_obj___exit__(size_t n_args, const mp_obj_t *args) {
-    i2ctarget_i2c_target_obj_t *self = MP_OBJ_TO_PTR(args[0]);
-    common_hal_i2ctarget_i2c_target_deinit(self);
-    return mp_const_none;
-}
-static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(i2ctarget_i2c_target___exit___obj, 4, 4, i2ctarget_i2c_target_obj___exit__);
+//  Provided by context manager helper.
 
 //|     def request(self, *, timeout: float = -1) -> I2CTargetRequest:
 //|         """Wait for an I2C request.
@@ -195,7 +190,7 @@ static const mp_rom_map_elem_t i2ctarget_i2c_target_locals_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&i2ctarget_i2c_target_deinit_obj) },
     { MP_ROM_QSTR(MP_QSTR___del__), MP_ROM_PTR(&i2ctarget_i2c_target_deinit_obj) },
     { MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&default___enter___obj) },
-    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&i2ctarget_i2c_target___exit___obj) },
+    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&default___exit___obj) },
     { MP_ROM_QSTR(MP_QSTR_request), MP_ROM_PTR(&i2ctarget_i2c_target_request_obj) },
 
 };
@@ -237,14 +232,7 @@ static mp_obj_t i2ctarget_i2c_target_request_make_new(const mp_obj_type_t *type,
 //|         """Close the request."""
 //|         ...
 //|
-static mp_obj_t i2ctarget_i2c_target_request_obj___exit__(size_t n_args, const mp_obj_t *args) {
-    i2ctarget_i2c_target_request_obj_t *self = MP_OBJ_TO_PTR(args[0]);
-    check_for_deinit(self->target);
-
-    common_hal_i2ctarget_i2c_target_close(self->target);
-    return mp_const_none;
-}
-static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(i2ctarget_i2c_target_request___exit___obj, 4, 4, i2ctarget_i2c_target_request_obj___exit__);
+//  Provided by context manager helper.
 
 //|     address: int
 //|     """The I2C address of the request."""
@@ -406,7 +394,7 @@ static MP_DEFINE_CONST_FUN_OBJ_1(i2ctarget_i2c_target_request_close_obj, i2ctarg
 
 static const mp_rom_map_elem_t i2ctarget_i2c_target_request_locals_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&default___enter___obj) },
-    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&i2ctarget_i2c_target_request___exit___obj) },
+    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&default___exit___obj) },
     { MP_ROM_QSTR(MP_QSTR_address), MP_ROM_PTR(&i2ctarget_i2c_target_request_address_obj) },
     { MP_ROM_QSTR(MP_QSTR_is_read), MP_ROM_PTR(&i2ctarget_i2c_target_request_is_read_obj) },
     { MP_ROM_QSTR(MP_QSTR_is_restart), MP_ROM_PTR(&i2ctarget_i2c_target_request_is_restart_obj) },
diff --git a/shared-bindings/imagecapture/ParallelImageCapture.c b/shared-bindings/imagecapture/ParallelImageCapture.c
index 02c58e8ee9e92..866edb489ce3e 100644
--- a/shared-bindings/imagecapture/ParallelImageCapture.c
+++ b/shared-bindings/imagecapture/ParallelImageCapture.c
@@ -154,19 +154,13 @@ static MP_DEFINE_CONST_FUN_OBJ_1(imagecapture_parallelimagecapture_deinit_obj, i
 //|         ...
 //|
 //|
-static mp_obj_t imagecapture_parallelimagecapture___exit__(size_t n_args, const mp_obj_t *args) {
-    (void)n_args;
-    common_hal_imagecapture_parallelimagecapture_deinit(args[0]);
-    return mp_const_none;
-}
-
-static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(imagecapture_parallelimagecapture___exit___obj, 4, 4, imagecapture_parallelimagecapture___exit__);
+//  Provided by context manager helper.
 
 
 static const mp_rom_map_elem_t imagecapture_parallelimagecapture_locals_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&imagecapture_parallelimagecapture_deinit_obj) },
     { MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&default___enter___obj) },
-    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&imagecapture_parallelimagecapture___exit___obj) },
+    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&default___exit___obj) },
 
     { MP_ROM_QSTR(MP_QSTR_capture), MP_ROM_PTR(&imagecapture_parallelimagecapture_capture_obj) },
     { MP_ROM_QSTR(MP_QSTR_continuous_capture_start), MP_ROM_PTR(&imagecapture_parallelimagecapture_continuous_capture_start_obj) },
diff --git a/shared-bindings/keypad/KeyMatrix.c b/shared-bindings/keypad/KeyMatrix.c
index d105cc6255a1a..8303645f20183 100644
--- a/shared-bindings/keypad/KeyMatrix.c
+++ b/shared-bindings/keypad/KeyMatrix.c
@@ -146,12 +146,7 @@ MP_DEFINE_CONST_FUN_OBJ_1(keypad_keymatrix_deinit_obj, keypad_keymatrix_deinit);
 //|         :ref:`lifetime-and-contextmanagers` for more info."""
 //|         ...
 //|
-static mp_obj_t keypad_keymatrix___exit__(size_t n_args, const mp_obj_t *args) {
-    (void)n_args;
-    common_hal_keypad_keymatrix_deinit(args[0]);
-    return MP_ROM_NONE;
-}
-static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(keypad_keymatrix___exit___obj, 4, 4, keypad_keymatrix___exit__);
+//  Provided by context manager helper.
 
 static void check_for_deinit(keypad_keymatrix_obj_t *self) {
     if (common_hal_keypad_deinited(self)) {
@@ -236,7 +231,7 @@ MP_DEFINE_CONST_FUN_OBJ_3(keypad_keymatrix_row_column_to_key_number_obj, keypad_
 static const mp_rom_map_elem_t keypad_keymatrix_locals_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_deinit),                   MP_ROM_PTR(&keypad_keymatrix_deinit_obj) },
     { MP_ROM_QSTR(MP_QSTR___enter__),                MP_ROM_PTR(&default___enter___obj) },
-    { MP_ROM_QSTR(MP_QSTR___exit__),                 MP_ROM_PTR(&keypad_keymatrix___exit___obj) },
+    { MP_ROM_QSTR(MP_QSTR___exit__),                 MP_ROM_PTR(&default___exit___obj) },
 
     { MP_ROM_QSTR(MP_QSTR_events),                   MP_ROM_PTR(&keypad_generic_events_obj) },
     { MP_ROM_QSTR(MP_QSTR_key_count),                MP_ROM_PTR(&keypad_generic_key_count_obj) },
diff --git a/shared-bindings/keypad/Keys.c b/shared-bindings/keypad/Keys.c
index 8e1a4af873bd3..10ac81cf1fb63 100644
--- a/shared-bindings/keypad/Keys.c
+++ b/shared-bindings/keypad/Keys.c
@@ -139,12 +139,7 @@ MP_DEFINE_CONST_FUN_OBJ_1(keypad_keys_deinit_obj, keypad_keys_deinit);
 //|         :ref:`lifetime-and-contextmanagers` for more info."""
 //|         ...
 //|
-static mp_obj_t keypad_keys___exit__(size_t n_args, const mp_obj_t *args) {
-    (void)n_args;
-    common_hal_keypad_keys_deinit(args[0]);
-    return MP_ROM_NONE;
-}
-static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(keypad_keys___exit___obj, 4, 4, keypad_keys___exit__);
+//  Provided by context manager helper.
 
 
 //|     def reset(self) -> None:
@@ -170,7 +165,7 @@ static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(keypad_keys___exit___obj, 4, 4, keypa
 static const mp_rom_map_elem_t keypad_keys_locals_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_deinit),       MP_ROM_PTR(&keypad_keys_deinit_obj) },
     { MP_ROM_QSTR(MP_QSTR___enter__),    MP_ROM_PTR(&default___enter___obj) },
-    { MP_ROM_QSTR(MP_QSTR___exit__),     MP_ROM_PTR(&keypad_keys___exit___obj) },
+    { MP_ROM_QSTR(MP_QSTR___exit__),     MP_ROM_PTR(&default___exit___obj) },
 
     { MP_ROM_QSTR(MP_QSTR_events),       MP_ROM_PTR(&keypad_generic_events_obj) },
     { MP_ROM_QSTR(MP_QSTR_key_count),    MP_ROM_PTR(&keypad_generic_key_count_obj) },
diff --git a/shared-bindings/keypad/ShiftRegisterKeys.c b/shared-bindings/keypad/ShiftRegisterKeys.c
index 070730d4b1733..1347735b5d2f8 100644
--- a/shared-bindings/keypad/ShiftRegisterKeys.c
+++ b/shared-bindings/keypad/ShiftRegisterKeys.c
@@ -194,12 +194,7 @@ MP_DEFINE_CONST_FUN_OBJ_1(keypad_shiftregisterkeys_deinit_obj, keypad_shiftregis
 //|         :ref:`lifetime-and-contextmanagers` for more info."""
 //|         ...
 //|
-static mp_obj_t keypad_shiftregisterkeys___exit__(size_t n_args, const mp_obj_t *args) {
-    (void)n_args;
-    common_hal_keypad_shiftregisterkeys_deinit(args[0]);
-    return MP_ROM_NONE;
-}
-static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(keypad_shiftregisterkeys___exit___obj, 4, 4, keypad_shiftregisterkeys___exit__);
+//  Provided by context manager helper.
 
 //|     def reset(self) -> None:
 //|         """Reset the internal state of the scanner to assume that all keys are now released.
@@ -225,7 +220,7 @@ static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(keypad_shiftregisterkeys___exit___obj
 static const mp_rom_map_elem_t keypad_shiftregisterkeys_locals_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_deinit),       MP_ROM_PTR(&keypad_shiftregisterkeys_deinit_obj) },
     { MP_ROM_QSTR(MP_QSTR___enter__),    MP_ROM_PTR(&default___enter___obj) },
-    { MP_ROM_QSTR(MP_QSTR___exit__),     MP_ROM_PTR(&keypad_shiftregisterkeys___exit___obj) },
+    { MP_ROM_QSTR(MP_QSTR___exit__),     MP_ROM_PTR(&default___exit___obj) },
 
     { MP_ROM_QSTR(MP_QSTR_events),       MP_ROM_PTR(&keypad_generic_events_obj) },
     { MP_ROM_QSTR(MP_QSTR_key_count),    MP_ROM_PTR(&keypad_generic_key_count_obj) },
diff --git a/shared-bindings/keypad_demux/DemuxKeyMatrix.c b/shared-bindings/keypad_demux/DemuxKeyMatrix.c
index 376b76e271b41..d76a20aec9d01 100644
--- a/shared-bindings/keypad_demux/DemuxKeyMatrix.c
+++ b/shared-bindings/keypad_demux/DemuxKeyMatrix.c
@@ -149,12 +149,7 @@ MP_DEFINE_CONST_FUN_OBJ_1(keypad_demux_demuxkeymatrix_deinit_obj, keypad_demux_d
 //|         :ref:`lifetime-and-contextmanagers` for more info."""
 //|         ...
 //|
-static mp_obj_t keypad_demux_demuxkeymatrix___exit__(size_t n_args, const mp_obj_t *args) {
-    (void)n_args;
-    common_hal_keypad_demux_demuxkeymatrix_deinit(args[0]);
-    return MP_ROM_NONE;
-}
-static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(keypad_demux_demuxkeymatrix___exit___obj, 4, 4, keypad_demux_demuxkeymatrix___exit__);
+//  Provided by context manager helper.
 
 static void check_for_deinit(keypad_demux_demuxkeymatrix_obj_t *self) {
     if (common_hal_keypad_deinited(self)) {
@@ -239,7 +234,7 @@ MP_DEFINE_CONST_FUN_OBJ_3(keypad_demux_demuxkeymatrix_row_column_to_key_number_o
 static const mp_rom_map_elem_t keypad_demux_demuxkeymatrix_locals_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_deinit),                   MP_ROM_PTR(&keypad_demux_demuxkeymatrix_deinit_obj) },
     { MP_ROM_QSTR(MP_QSTR___enter__),                MP_ROM_PTR(&default___enter___obj) },
-    { MP_ROM_QSTR(MP_QSTR___exit__),                 MP_ROM_PTR(&keypad_demux_demuxkeymatrix___exit___obj) },
+    { MP_ROM_QSTR(MP_QSTR___exit__),                 MP_ROM_PTR(&default___exit___obj) },
 
     { MP_ROM_QSTR(MP_QSTR_events),                   MP_ROM_PTR(&keypad_generic_events_obj) },
     { MP_ROM_QSTR(MP_QSTR_key_count),                MP_ROM_PTR(&keypad_generic_key_count_obj) },
diff --git a/shared-bindings/onewireio/OneWire.c b/shared-bindings/onewireio/OneWire.c
index ff18ee2f74712..a3750ae5e074d 100644
--- a/shared-bindings/onewireio/OneWire.c
+++ b/shared-bindings/onewireio/OneWire.c
@@ -76,12 +76,7 @@ static void check_for_deinit(onewireio_onewire_obj_t *self) {
 //|         :ref:`lifetime-and-contextmanagers` for more info."""
 //|         ...
 //|
-static mp_obj_t onewireio_onewire_obj___exit__(size_t n_args, const mp_obj_t *args) {
-    (void)n_args;
-    common_hal_onewireio_onewire_deinit(args[0]);
-    return mp_const_none;
-}
-static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(onewireio_onewire___exit___obj, 4, 4, onewireio_onewire_obj___exit__);
+//  Provided by context manager helper.
 
 //|     def reset(self) -> bool:
 //|         """Reset the OneWire bus and read presence
@@ -131,7 +126,7 @@ static const mp_rom_map_elem_t onewireio_onewire_locals_dict_table[] = {
     // Methods
     { MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&onewireio_onewire_deinit_obj) },
     { MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&default___enter___obj) },
-    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&onewireio_onewire___exit___obj) },
+    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&default___exit___obj) },
     { MP_ROM_QSTR(MP_QSTR_reset), MP_ROM_PTR(&onewireio_onewire_reset_obj) },
     { MP_ROM_QSTR(MP_QSTR_read_bit), MP_ROM_PTR(&onewireio_onewire_read_bit_obj) },
     { MP_ROM_QSTR(MP_QSTR_write_bit), MP_ROM_PTR(&onewireio_onewire_write_bit_obj) },
diff --git a/shared-bindings/ps2io/Ps2.c b/shared-bindings/ps2io/Ps2.c
index 82174420fff5d..8766ea7a2a11b 100644
--- a/shared-bindings/ps2io/Ps2.c
+++ b/shared-bindings/ps2io/Ps2.c
@@ -92,13 +92,7 @@ static void check_for_deinit(ps2io_ps2_obj_t *self) {
 //|         :ref:`lifetime-and-contextmanagers` for more info."""
 //|         ...
 //|
-static mp_obj_t ps2io_ps2_obj___exit__(size_t n_args, const mp_obj_t *args) {
-    mp_check_self(mp_obj_is_type(args[0], &ps2io_ps2_type));
-    ps2io_ps2_obj_t *self = MP_OBJ_TO_PTR(args[0]);
-    common_hal_ps2io_ps2_deinit(self);
-    return mp_const_none;
-}
-static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(ps2io_ps2___exit___obj, 4, 4, ps2io_ps2_obj___exit__);
+//  Provided by context manager helper.
 
 //|     def popleft(self) -> int:
 //|         """Removes and returns the oldest received byte. When buffer
@@ -205,7 +199,7 @@ static const mp_rom_map_elem_t ps2io_ps2_locals_dict_table[] = {
     // Methods
     { MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&ps2io_ps2_deinit_obj) },
     { MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&default___enter___obj) },
-    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&ps2io_ps2___exit___obj) },
+    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&default___exit___obj) },
     { MP_ROM_QSTR(MP_QSTR_popleft), MP_ROM_PTR(&ps2io_ps2_popleft_obj) },
     { MP_ROM_QSTR(MP_QSTR_sendcmd), MP_ROM_PTR(&ps2io_ps2_sendcmd_obj) },
     { MP_ROM_QSTR(MP_QSTR_clear_errors), MP_ROM_PTR(&ps2io_ps2_clear_errors_obj) },
diff --git a/shared-bindings/pulseio/PulseIn.c b/shared-bindings/pulseio/PulseIn.c
index 9d663cbe0dede..d9e6bfd7aecc3 100644
--- a/shared-bindings/pulseio/PulseIn.c
+++ b/shared-bindings/pulseio/PulseIn.c
@@ -104,12 +104,7 @@ static void check_for_deinit(pulseio_pulsein_obj_t *self) {
 //|         :ref:`lifetime-and-contextmanagers` for more info."""
 //|         ...
 //|
-static mp_obj_t pulseio_pulsein_obj___exit__(size_t n_args, const mp_obj_t *args) {
-    (void)n_args;
-    common_hal_pulseio_pulsein_deinit(args[0]);
-    return mp_const_none;
-}
-static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(pulseio_pulsein___exit___obj, 4, 4, pulseio_pulsein_obj___exit__);
+//  Provided by context manager helper.
 
 //|     def pause(self) -> None:
 //|         """Pause pulse capture"""
@@ -267,7 +262,7 @@ static const mp_rom_map_elem_t pulseio_pulsein_locals_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&pulseio_pulsein_deinit_obj) },
     { MP_ROM_QSTR(MP_QSTR___del__), MP_ROM_PTR(&pulseio_pulsein_deinit_obj) },
     { MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&default___enter___obj) },
-    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&pulseio_pulsein___exit___obj) },
+    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&default___exit___obj) },
     { MP_ROM_QSTR(MP_QSTR_pause), MP_ROM_PTR(&pulseio_pulsein_pause_obj) },
     { MP_ROM_QSTR(MP_QSTR_resume), MP_ROM_PTR(&pulseio_pulsein_resume_obj) },
     { MP_ROM_QSTR(MP_QSTR_clear), MP_ROM_PTR(&pulseio_pulsein_clear_obj) },
diff --git a/shared-bindings/pulseio/PulseOut.c b/shared-bindings/pulseio/PulseOut.c
index 042515a7138c6..947aa4b518ec8 100644
--- a/shared-bindings/pulseio/PulseOut.c
+++ b/shared-bindings/pulseio/PulseOut.c
@@ -91,12 +91,7 @@ static MP_DEFINE_CONST_FUN_OBJ_1(pulseio_pulseout_deinit_obj, pulseio_pulseout_d
 //|         :ref:`lifetime-and-contextmanagers` for more info."""
 //|         ...
 //|
-static mp_obj_t pulseio_pulseout_obj___exit__(size_t n_args, const mp_obj_t *args) {
-    (void)n_args;
-    common_hal_pulseio_pulseout_deinit(args[0]);
-    return mp_const_none;
-}
-static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(pulseio_pulseout___exit___obj, 4, 4, pulseio_pulseout_obj___exit__);
+//  Provided by context manager helper.
 
 //|     def send(self, pulses: ReadableBuffer) -> None:
 //|         """Pulse alternating on and off durations in microseconds starting with on.
@@ -133,7 +128,7 @@ static const mp_rom_map_elem_t pulseio_pulseout_locals_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&pulseio_pulseout_deinit_obj) },
     { MP_ROM_QSTR(MP_QSTR___del__), MP_ROM_PTR(&pulseio_pulseout_deinit_obj) },
     { MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&default___enter___obj) },
-    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&pulseio_pulseout___exit___obj) },
+    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&default___exit___obj) },
     { MP_ROM_QSTR(MP_QSTR_send), MP_ROM_PTR(&pulseio_pulseout_send_obj) },
     #endif // CIRCUITPY_PULSEIO_PULSEOUT
 };
diff --git a/shared-bindings/pwmio/PWMOut.c b/shared-bindings/pwmio/PWMOut.c
index 6665ee082fa69..97dbd2079f72b 100644
--- a/shared-bindings/pwmio/PWMOut.c
+++ b/shared-bindings/pwmio/PWMOut.c
@@ -185,12 +185,7 @@ static void check_for_deinit(pwmio_pwmout_obj_t *self) {
 //|         :ref:`lifetime-and-contextmanagers` for more info."""
 //|         ...
 //|
-static mp_obj_t pwmio_pwmout_obj___exit__(size_t n_args, const mp_obj_t *args) {
-    (void)n_args;
-    common_hal_pwmio_pwmout_deinit(args[0]);
-    return mp_const_none;
-}
-static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(pwmio_pwmout___exit___obj, 4, 4, pwmio_pwmout_obj___exit__);
+//  Provided by context manager helper.
 
 //|     duty_cycle: int
 //|     """16 bit value that dictates how much of one cycle is high (1) versus low
@@ -267,7 +262,7 @@ static const mp_rom_map_elem_t pwmio_pwmout_locals_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&pwmio_pwmout_deinit_obj) },
     { MP_ROM_QSTR(MP_QSTR___del__), MP_ROM_PTR(&pwmio_pwmout_deinit_obj) },
     { MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&default___enter___obj) },
-    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&pwmio_pwmout___exit___obj) },
+    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&default___exit___obj) },
 
     // Properties
     { MP_ROM_QSTR(MP_QSTR_duty_cycle), MP_ROM_PTR(&pwmio_pwmout_duty_cycle_obj) },
diff --git a/shared-bindings/rotaryio/IncrementalEncoder.c b/shared-bindings/rotaryio/IncrementalEncoder.c
index 0dd702d2c8b30..810782bc526f6 100644
--- a/shared-bindings/rotaryio/IncrementalEncoder.c
+++ b/shared-bindings/rotaryio/IncrementalEncoder.c
@@ -94,12 +94,7 @@ static void check_for_deinit(rotaryio_incrementalencoder_obj_t *self) {
 //|         :ref:`lifetime-and-contextmanagers` for more info."""
 //|         ...
 //|
-static mp_obj_t rotaryio_incrementalencoder_obj___exit__(size_t n_args, const mp_obj_t *args) {
-    (void)n_args;
-    common_hal_rotaryio_incrementalencoder_deinit(args[0]);
-    return mp_const_none;
-}
-static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(rotaryio_incrementalencoder___exit___obj, 4, 4, rotaryio_incrementalencoder_obj___exit__);
+//  Provided by context manager helper.
 
 
 //|     divisor: int
@@ -158,7 +153,7 @@ static const mp_rom_map_elem_t rotaryio_incrementalencoder_locals_dict_table[] =
     { MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&rotaryio_incrementalencoder_deinit_obj) },
     { MP_ROM_QSTR(MP_QSTR___del__), MP_ROM_PTR(&rotaryio_incrementalencoder_deinit_obj) },
     { MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&default___enter___obj) },
-    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&rotaryio_incrementalencoder___exit___obj) },
+    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&default___exit___obj) },
     { MP_ROM_QSTR(MP_QSTR_position), MP_ROM_PTR(&rotaryio_incrementalencoder_position_obj) },
     { MP_ROM_QSTR(MP_QSTR_divisor), MP_ROM_PTR(&rotaryio_incrementalencoder_divisor_obj) },
 };
diff --git a/shared-bindings/sdioio/SDCard.c b/shared-bindings/sdioio/SDCard.c
index 9b616eba2e8d2..98cec5bc11bdf 100644
--- a/shared-bindings/sdioio/SDCard.c
+++ b/shared-bindings/sdioio/SDCard.c
@@ -234,17 +234,12 @@ MP_DEFINE_CONST_FUN_OBJ_1(sdioio_sdcard_deinit_obj, sdioio_sdcard_obj_deinit);
 //|         ...
 //|
 //|
-static mp_obj_t sdioio_sdcard_obj___exit__(size_t n_args, const mp_obj_t *args) {
-    (void)n_args;
-    common_hal_sdioio_sdcard_deinit(args[0]);
-    return mp_const_none;
-}
-static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(sdioio_sdcard_obj___exit___obj, 4, 4, sdioio_sdcard_obj___exit__);
+//  Provided by context manager helper.
 
 static const mp_rom_map_elem_t sdioio_sdcard_locals_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&sdioio_sdcard_deinit_obj) },
     { MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&default___enter___obj) },
-    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&sdioio_sdcard_obj___exit___obj) },
+    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&default___exit___obj) },
 
     { MP_ROM_QSTR(MP_QSTR_configure), MP_ROM_PTR(&sdioio_sdcard_configure_obj) },
     { MP_ROM_QSTR(MP_QSTR_frequency), MP_ROM_PTR(&sdioio_sdcard_frequency_obj) },
diff --git a/shared-bindings/synthio/MidiTrack.c b/shared-bindings/synthio/MidiTrack.c
index 665e7e853c29c..9add8f1745c83 100644
--- a/shared-bindings/synthio/MidiTrack.c
+++ b/shared-bindings/synthio/MidiTrack.c
@@ -109,12 +109,7 @@ static void check_for_deinit(synthio_miditrack_obj_t *self) {
 //|         :ref:`lifetime-and-contextmanagers` for more info."""
 //|         ...
 //|
-static mp_obj_t synthio_miditrack_obj___exit__(size_t n_args, const mp_obj_t *args) {
-    (void)n_args;
-    common_hal_synthio_miditrack_deinit(args[0]);
-    return mp_const_none;
-}
-static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(synthio_miditrack___exit___obj, 4, 4, synthio_miditrack_obj___exit__);
+//  Provided by context manager helper.
 
 //|     sample_rate: int
 //|     """32 bit value that tells how quickly samples are played in Hertz (cycles per second)."""
@@ -142,7 +137,7 @@ static const mp_rom_map_elem_t synthio_miditrack_locals_dict_table[] = {
     // Methods
     { MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&synthio_miditrack_deinit_obj) },
     { MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&default___enter___obj) },
-    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&synthio_miditrack___exit___obj) },
+    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&default___exit___obj) },
 
     // Properties
     { MP_ROM_QSTR(MP_QSTR_error_location), MP_ROM_PTR(&synthio_miditrack_error_location_obj) },
diff --git a/shared-bindings/synthio/Synthesizer.c b/shared-bindings/synthio/Synthesizer.c
index 219f83954184e..23b549a2ac57f 100644
--- a/shared-bindings/synthio/Synthesizer.c
+++ b/shared-bindings/synthio/Synthesizer.c
@@ -203,12 +203,7 @@ static MP_DEFINE_CONST_FUN_OBJ_1(synthio_synthesizer_deinit_obj, synthio_synthes
 //|         :ref:`lifetime-and-contextmanagers` for more info."""
 //|         ...
 //|
-static mp_obj_t synthio_synthesizer_obj___exit__(size_t n_args, const mp_obj_t *args) {
-    (void)n_args;
-    common_hal_synthio_synthesizer_deinit(args[0]);
-    return mp_const_none;
-}
-static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(synthio_synthesizer___exit___obj, 4, 4, synthio_synthesizer_obj___exit__);
+//  Provided by context manager helper.
 
 //|     envelope: Optional[Envelope]
 //|     """The envelope to apply to all notes. `None`, the default envelope, instantly turns notes on and off. The envelope may be changed dynamically, but it affects all notes (even currently playing notes)"""
@@ -405,7 +400,7 @@ static const mp_rom_map_elem_t synthio_synthesizer_locals_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR_release_all_then_press), MP_ROM_PTR(&synthio_synthesizer_release_all_then_press_obj) },
     { MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&synthio_synthesizer_deinit_obj) },
     { MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&default___enter___obj) },
-    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&synthio_synthesizer___exit___obj) },
+    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&default___exit___obj) },
 
     { MP_ROM_QSTR(MP_QSTR_low_pass_filter), MP_ROM_PTR(&synthio_synthesizer_lpf_fun_obj) },
     { MP_ROM_QSTR(MP_QSTR_high_pass_filter), MP_ROM_PTR(&synthio_synthesizer_hpf_fun_obj) },
diff --git a/shared-bindings/touchio/TouchIn.c b/shared-bindings/touchio/TouchIn.c
index 8dae515546f12..9539a43860c5d 100644
--- a/shared-bindings/touchio/TouchIn.c
+++ b/shared-bindings/touchio/TouchIn.c
@@ -79,12 +79,7 @@ static void check_for_deinit(touchio_touchin_obj_t *self) {
 //|         :ref:`lifetime-and-contextmanagers` for more info."""
 //|         ...
 //|
-static mp_obj_t touchio_touchin_obj___exit__(size_t n_args, const mp_obj_t *args) {
-    (void)n_args;
-    common_hal_touchio_touchin_deinit(args[0]);
-    return mp_const_none;
-}
-static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(touchio_touchin___exit___obj, 4, 4, touchio_touchin_obj___exit__);
+//  Provided by context manager helper.
 
 //|     value: bool
 //|     """Whether the touch pad is being touched or not. (read-only)
@@ -156,7 +151,7 @@ MP_PROPERTY_GETSET(touchio_touchin_threshold_obj,
 
 static const mp_rom_map_elem_t touchio_touchin_locals_dict_table[] = {
     { MP_ROM_QSTR(MP_QSTR___enter__), MP_ROM_PTR(&default___enter___obj) },
-    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&touchio_touchin___exit___obj) },
+    { MP_ROM_QSTR(MP_QSTR___exit__), MP_ROM_PTR(&default___exit___obj) },
     { MP_ROM_QSTR(MP_QSTR_deinit), MP_ROM_PTR(&touchio_touchin_deinit_obj) },
 
     { MP_OBJ_NEW_QSTR(MP_QSTR_value), MP_ROM_PTR(&touchio_touchin_value_obj)},
diff --git a/shared/runtime/context_manager_helpers.c b/shared/runtime/context_manager_helpers.c
index 56955da089c32..5b025209ff7f2 100644
--- a/shared/runtime/context_manager_helpers.c
+++ b/shared/runtime/context_manager_helpers.c
@@ -7,8 +7,12 @@
 #include "shared/runtime/context_manager_helpers.h"
 
 #include "py/obj.h"
+#include "py/runtime.h"
 
-static mp_obj_t default___enter__(mp_obj_t self_in) {
-    return self_in;
+static mp_obj_t default___exit__(size_t n_args, const mp_obj_t *args) {
+    mp_obj_t dest[2];
+    mp_load_method(args[0], MP_QSTR_deinit, dest);
+    mp_call_method_n_kw(0, 0, dest);
+    return mp_const_none;
 }
-MP_DEFINE_CONST_FUN_OBJ_1(default___enter___obj, default___enter__);
+MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(default___exit___obj, 4, 4, default___exit__);
diff --git a/shared/runtime/context_manager_helpers.h b/shared/runtime/context_manager_helpers.h
index d8ec102ac5a54..10970ce1a1a92 100644
--- a/shared/runtime/context_manager_helpers.h
+++ b/shared/runtime/context_manager_helpers.h
@@ -8,4 +8,13 @@
 
 #include "py/obj.h"
 
-MP_DECLARE_CONST_FUN_OBJ_1(default___enter___obj);
+// An object that has a `deinit` method can use `default___enter___obj` and
+// `default___exit___obj` to define the `__enter__` and `__exit__` members in
+// its object table.
+//
+// `__enter__` returns the object itself, and `__exit__` calls its `deinit`.
+//
+// If enter/exit do anything else, such as taking & releasing a lock, these are
+// not suitable.
+#define default___enter___obj (mp_identity_obj)
+MP_DECLARE_CONST_FUN_OBJ_VAR_BETWEEN(default___exit___obj);