diff --git a/tests/extmod_hardware/machine_uart_irq_break.py b/tests/extmod_hardware/machine_uart_irq_break.py
new file mode 100644
index 000000000000..82879c1d6e4a
--- /dev/null
+++ b/tests/extmod_hardware/machine_uart_irq_break.py
@@ -0,0 +1,62 @@
+# Test machine.UART.IRQ_BREAK firing after a break is received.
+#
+# IMPORTANT: This test requires hardware connections: the UART TX and RX
+# pins must be wired together.
+
+try:
+    from machine import UART
+
+    UART.IRQ_BREAK
+except (ImportError, AttributeError):
+    print("SKIP")
+    raise SystemExit
+
+import time, sys
+
+# Configure pins based on the target.
+if "esp32" in sys.platform:
+    if "ESP32S2" in sys.implementation._machine or "ESP32C3" in sys.implementation._machine:
+        print("SKIP")
+        raise SystemExit
+    # ESP32 needs separate UART instances for the test
+    recv_uart_id = 1
+    recv_tx_pin = 14
+    recv_rx_pin = 5
+    send_uart_id = 2
+    send_tx_pin = 4
+    send_rx_pin = 12
+elif "rp2" in sys.platform:
+    recv_uart_id = 0
+    send_uart_id = 0
+    recv_tx_pin = "GPIO0"
+    recv_rx_pin = "GPIO1"
+else:
+    print("Please add support for this test on this platform.")
+    raise SystemExit
+
+
+def irq(u):
+    print("IRQ_BREAK:", bool(u.irq().flags() & u.IRQ_BREAK), "data:", u.read(1))
+
+
+# Test that the IRQ is called for each break received.
+for bits_per_s in (2400, 9600, 57600):
+    recv_uart = UART(recv_uart_id, bits_per_s, tx=recv_tx_pin, rx=recv_rx_pin)
+    if recv_uart_id != send_uart_id:
+        send_uart = UART(send_uart_id, bits_per_s, tx=send_tx_pin, rx=send_rx_pin)
+    else:
+        send_uart = recv_uart
+
+    recv_uart.irq(irq, recv_uart.IRQ_BREAK)
+
+    print("write", bits_per_s)
+    for i in range(3):
+        send_uart.write(str(i))
+        send_uart.flush()
+        time.sleep_ms(10)
+        send_uart.sendbreak()
+        time.sleep_ms(10)
+        if "esp32" in sys.platform:
+            # On esp32 a read is needed to read in the break byte.
+            recv_uart.read()
+    print("done")
diff --git a/tests/extmod_hardware/machine_uart_irq_break.py.exp b/tests/extmod_hardware/machine_uart_irq_break.py.exp
new file mode 100644
index 000000000000..ca8afe8f2b6b
--- /dev/null
+++ b/tests/extmod_hardware/machine_uart_irq_break.py.exp
@@ -0,0 +1,15 @@
+write 2400
+IRQ_BREAK: True data: b'0'
+IRQ_BREAK: True data: b'1'
+IRQ_BREAK: True data: b'2'
+done
+write 9600
+IRQ_BREAK: True data: b'0'
+IRQ_BREAK: True data: b'1'
+IRQ_BREAK: True data: b'2'
+done
+write 57600
+IRQ_BREAK: True data: b'0'
+IRQ_BREAK: True data: b'1'
+IRQ_BREAK: True data: b'2'
+done
diff --git a/tests/extmod_hardware/machine_uart_irq_rx.py b/tests/extmod_hardware/machine_uart_irq_rx.py
new file mode 100644
index 000000000000..0d1cc43357d4
--- /dev/null
+++ b/tests/extmod_hardware/machine_uart_irq_rx.py
@@ -0,0 +1,82 @@
+# Test machine.UART.IRQ_RX firing for each character received.
+#
+# IMPORTANT: This test requires hardware connections: the UART TX and RX
+# pins must be wired together.
+
+try:
+    from machine import UART
+
+    UART.IRQ_RX
+except (ImportError, AttributeError):
+    print("SKIP")
+    raise SystemExit
+
+import time, sys
+
+byte_by_byte = False
+# Configure pins based on the target.
+if "esp32" in sys.platform:
+    uart_id = 1
+    tx_pin = 4
+    rx_pin = 5
+elif "pyboard" in sys.platform:
+    uart_id = 4
+    tx_pin = None  # PA0
+    rx_pin = None  # PA1
+elif "samd" in sys.platform and "ItsyBitsy M0" in sys.implementation._machine:
+    uart_id = 0
+    tx_pin = "D1"
+    rx_pin = "D0"
+    byte_by_byte = True
+elif "samd" in sys.platform and "ItsyBitsy M4" in sys.implementation._machine:
+    uart_id = 3
+    tx_pin = "D1"
+    rx_pin = "D0"
+elif "samd" in sys.platform and "Seeed" in sys.implementation._machine:
+    uart_id = 0
+    tx_pin = "A4_D4"
+    rx_pin = "A5_D5"
+elif "nrf" in sys.platform:
+    uart_id = 0
+    tx_pin = None
+    rx_pin = None
+elif "renesas-ra" in sys.platform:
+    uart_id = 9
+    tx_pin = None  # P602 @ RA6M2
+    rx_pin = None  # P601 @ RA6M2
+elif "CC3200" in sys.implementation._machine:
+    # CC3200 doesn't work because it's too slow and has an allocation error in the handler.
+    print("SKIP")
+    raise SystemExit
+else:
+    print("Please add support for this test on this platform.")
+    raise SystemExit
+
+
+def irq(u):
+    print("IRQ_RX:", bool(u.irq().flags() & u.IRQ_RX), "data:", u.read(1))
+
+
+text = "1234"
+
+# Test that the IRQ is called for each byte received.
+# Use slow baudrates so that the IRQ has time to run.
+for bits_per_s in (2400, 9600):
+    if tx_pin is None:
+        uart = UART(uart_id, bits_per_s)
+    else:
+        uart = UART(uart_id, bits_per_s, tx=tx_pin, rx=rx_pin)
+
+    uart.irq(irq, uart.IRQ_RX)
+
+    print("write", bits_per_s)
+    if byte_by_byte:
+        # slow devices need data to be sent slow
+        for c in text:
+            uart.write(c)
+            uart.flush()
+    else:
+        uart.write(text)
+        uart.flush()
+    time.sleep_ms(100)
+    print("done")
diff --git a/tests/extmod_hardware/machine_uart_irq_rx.py.exp b/tests/extmod_hardware/machine_uart_irq_rx.py.exp
new file mode 100644
index 000000000000..945b1e508fa7
--- /dev/null
+++ b/tests/extmod_hardware/machine_uart_irq_rx.py.exp
@@ -0,0 +1,12 @@
+write 2400
+IRQ_RX: True data: b'1'
+IRQ_RX: True data: b'2'
+IRQ_RX: True data: b'3'
+IRQ_RX: True data: b'4'
+done
+write 9600
+IRQ_RX: True data: b'1'
+IRQ_RX: True data: b'2'
+IRQ_RX: True data: b'3'
+IRQ_RX: True data: b'4'
+done
diff --git a/tests/extmod_hardware/machine_uart_irq_rxidle.py b/tests/extmod_hardware/machine_uart_irq_rxidle.py
new file mode 100644
index 000000000000..851c7bfb2156
--- /dev/null
+++ b/tests/extmod_hardware/machine_uart_irq_rxidle.py
@@ -0,0 +1,70 @@
+# Test machine.UART.IRQ_RXIDLE firing after a set of characters are received.
+#
+# IMPORTANT: This test requires hardware connections: the UART TX and RX
+# pins must be wired together.
+
+try:
+    from machine import UART
+
+    UART.IRQ_RXIDLE
+except (ImportError, AttributeError):
+    print("SKIP")
+    raise SystemExit
+
+import time, sys
+
+# Configure pins based on the target.
+if "esp32" in sys.platform:
+    uart_id = 1
+    tx_pin = 4
+    rx_pin = 5
+elif "mimxrt" in sys.platform and "Teensy 4" in sys.implementation._machine:
+    uart_id = 1
+    tx_pin = None
+elif "pyboard" in sys.platform:
+    uart_id = 4
+    tx_pin = None  # PA0
+    rx_pin = None  # PA1
+elif "renesas-ra" in sys.platform:
+    uart_id = 9
+    tx_pin = None  # P602 @ RA6M2
+    rx_pin = None  # P601 @ RA6M2
+elif "rp2" in sys.platform:
+    uart_id = 0
+    tx_pin = "GPIO0"
+    rx_pin = "GPIO1"
+elif "samd" in sys.platform and "ItsyBitsy M0" in sys.implementation._machine:
+    uart_id = 0
+    tx_pin = "D1"
+    rx_pin = "D0"
+    byte_by_byte = True
+elif "samd" in sys.platform and "ItsyBitsy M4" in sys.implementation._machine:
+    uart_id = 3
+    tx_pin = "D1"
+    rx_pin = "D0"
+else:
+    print("Please add support for this test on this platform.")
+    raise SystemExit
+
+
+def irq(u):
+    print("IRQ_RXIDLE:", bool(u.irq().flags() & u.IRQ_RXIDLE), "data:", u.read())
+
+
+text = "12345678"
+
+# Test that the IRQ is called for each set of byte received.
+for bits_per_s in (2400, 9600, 115200):
+    if tx_pin is None:
+        uart = UART(uart_id, bits_per_s)
+    else:
+        uart = UART(uart_id, bits_per_s, tx=tx_pin, rx=rx_pin)
+
+    uart.irq(irq, uart.IRQ_RXIDLE)
+
+    print("write", bits_per_s)
+    uart.write(text)
+    uart.flush()
+    print("ready")
+    time.sleep_ms(100)
+    print("done")
diff --git a/tests/extmod_hardware/machine_uart_irq_rxidle.py.exp b/tests/extmod_hardware/machine_uart_irq_rxidle.py.exp
new file mode 100644
index 000000000000..ce1890a06a4b
--- /dev/null
+++ b/tests/extmod_hardware/machine_uart_irq_rxidle.py.exp
@@ -0,0 +1,12 @@
+write 2400
+ready
+IRQ_RXIDLE: True data: b'12345678'
+done
+write 9600
+ready
+IRQ_RXIDLE: True data: b'12345678'
+done
+write 115200
+ready
+IRQ_RXIDLE: True data: b'12345678'
+done