diff --git a/test/test_pinephone_lcd.c b/test/test_pinephone_lcd.c
new file mode 100644
index 0000000..438d388
--- /dev/null
+++ b/test/test_pinephone_lcd.c
@@ -0,0 +1,11 @@
+// Test Code for PinePhone LCD Panel
+// Add `#include "../../pinephone-nuttx/test/test_pinephone_lcd.c"` to the end of pinephone_lcd_backlight_enable(), before `return OK` in this file:
+// https://github.com/apache/nuttx/blob/master/boards/arm64/a64/pinephone/src/pinephone_lcd.c
+
+{
+  DEBUGASSERT(percent == 90);
+  DEBUGASSERT(R_PWM_CTRL_REG == 0x1f03800);
+  DEBUGASSERT(R_PWM_CH0_PERIOD == 0x1f03804);
+  DEBUGASSERT(period == 0x4af0437);
+  DEBUGASSERT(ctrl == 0x5f);
+}