diff --git a/port/moonlight/src/trap_non_vectored.c b/port/moonlight/src/trap_non_vectored.c
index 90c5d21..0f891d7 100644
--- a/port/moonlight/src/trap_non_vectored.c
+++ b/port/moonlight/src/trap_non_vectored.c
@@ -18,9 +18,6 @@
 
 extern void _tx_timer_interrupt(void);
 extern uintptr_t exception(uintptr_t mcause, uintptr_t mepc, uintptr_t mtval);
-#ifdef TX_REGRESSION_TEST
-extern void test_interrupt_dispatch(void);
-#endif
 
 void (*irq_handler[__riscv_xlen])();
 
@@ -41,9 +38,6 @@ void trap_handler(uintptr_t mcause, uintptr_t mepc, uintptr_t mtval) {
                 printf("Timer interrupt being handled (pc=%lx)\n", mepc);
 #endif
                 hwtimer_handler();
-#ifdef TX_REGRESSION_TEST
-                test_interrupt_dispatch();
-#endif
                 _tx_timer_interrupt();
                 break;
 #ifdef TX_THREAD_SMP_INTER_CORE_INTERRUPT