diff --git a/tests/extmod_hardware/machine_encoder.py b/tests/extmod_hardware/machine_encoder.py
index f28eb6de6f..c218c8bfb6 100644
--- a/tests/extmod_hardware/machine_encoder.py
+++ b/tests/extmod_hardware/machine_encoder.py
@@ -11,22 +11,16 @@ except ImportError:
     raise SystemExit
 
 import sys
+import unittest
 from machine import Pin
+from target_wiring import encoder_loopback_id, encoder_loopback_out_pins, encoder_loopback_in_pins
 
 PRINT = False
 PIN_INIT_VALUE = 1
 
-if "esp32" in sys.platform:
-    id = 0
-    out0_pin = 4
-    in0_pin = 5
-    out1_pin = 12
-    in1_pin = 13
-else:
-    print("Please add support for this test on this platform.")
-    raise SystemExit
-
-import unittest
+id = encoder_loopback_id
+out0_pin, out1_pin = encoder_loopback_out_pins
+in0_pin, in1_pin = encoder_loopback_in_pins
 
 out0_pin = Pin(out0_pin, mode=Pin.OUT)
 in0_pin = Pin(in0_pin, mode=Pin.IN)
diff --git a/tests/run-tests.py b/tests/run-tests.py
index d8d2c42ad2..b4654c2e6b 100755
--- a/tests/run-tests.py
+++ b/tests/run-tests.py
@@ -309,6 +309,7 @@ tests_requiring_slice = (
 tests_requiring_target_wiring = (
     "extmod/machine_uart_irq_txidle.py",
     "extmod/machine_uart_tx.py",
+    "extmod_hardware/machine_encoder.py",
     "extmod_hardware/machine_uart_irq_break.py",
     "extmod_hardware/machine_uart_irq_rx.py",
     "extmod_hardware/machine_uart_irq_rxidle.py",
diff --git a/tests/target_wiring/esp32.py b/tests/target_wiring/esp32.py
index 63d7a81a2d..2767cd5acb 100644
--- a/tests/target_wiring/esp32.py
+++ b/tests/target_wiring/esp32.py
@@ -2,6 +2,11 @@
 #
 # Connect:
 # - GPIO4 to GPIO5
+# - GPIO12 to GPIO13
 
 uart_loopback_args = (1,)
 uart_loopback_kwargs = {"tx": 4, "rx": 5}
+
+encoder_loopback_id = 0
+encoder_loopback_out_pins = (4, 12)
+encoder_loopback_in_pins = (5, 13)