diff --git a/src/testbench_denano.c b/src/testbench_denano.c
index 86228c3..228f1fc 100644
--- a/src/testbench_denano.c
+++ b/src/testbench_denano.c
@@ -18,9 +18,31 @@
 #define	TEST16_ERROR	(ERROR | 0x1600)
 
 extern int paranoia(int argc, char **argv);
-
 gpio_if_t gpio_if;
 
+uint32_t test_icache_instr[] = 
+{
+	0x27bdfff8,		// addiu	sp,sp,-8
+	0xafbe0004,		// sw	s8,4(sp)
+	0xafb00000, 	// sw	s0,0(sp)
+	0x03a0f021, 	// move	s8,sp
+	0x24100001, 	// li	s0,1
+	0x00108040, 	// sll	s0,s0,0x1
+	0x00108040, 	// sll	s0,s0,0x1
+	0x00108040, 	// sll	s0,s0,0x1
+	0x00108040, 	// sll	s0,s0,0x1
+	0x00108040, 	// sll	s0,s0,0x1
+	0x00108040, 	// sll	s0,s0,0x1
+	0x00108040, 	// sll	s0,s0,0x1
+	0x00108040, 	// sll	s0,s0,0x1
+	0x02001021, 	// move	v0,s0
+	0x03c0e821, 	// move	sp,s8
+	0x8fbe0004, 	// lw	s8,4(sp)
+	0x8fb00000, 	// lw	s0,0(sp)
+	0x27bd0008, 	// addiu	sp,sp,8
+	0x03e00008, 	// jr	ra
+	0x00000000		// nop
+};
 
 uint32_t* pf(void)
 {
@@ -809,6 +831,30 @@ int Test16_MemTest(void)
 	return 0;
 }
 
+uint32_t test_Icache()
+{
+	typedef uint32_t (*func_t)(void);
+	
+	uint32_t *pInstr = malloc(sizeof(test_icache_instr));
+	memcpy(pInstr, test_icache_instr, sizeof(test_icache_instr));
+	func_t pF = (func_t)pInstr;
+	
+	uint32_t v = pF();
+	printf("v = %u\n", (unsigned)v);
+	
+	pInstr[4] = 0x24100002;
+	v = pF();
+	printf("v = %u\n", (unsigned)v);
+
+	ICACHE_invalidate_at(&pInstr[4]);
+	v = pF();
+	printf("v = %u\n", (unsigned)v);
+	
+	free(pF);
+	
+	return 0;
+}
+
 int main (void)
 {
 	int result, i, j, cnt, size;
@@ -992,6 +1038,14 @@ int main (void)
 //			break;
 //		printf("passed\n\n");
 
+		printf("-------------------------------------------\n");
+		printf("-- I-Cache test ---------------------------\n");
+		printf("-------------------------------------------\n");
+		result = test_Icache();
+		if (IS_ERROR(result))
+			break;
+		printf("passed\n\n");
+
 		printf("Iteration %d: Passed\n", cnt);
 		curr_date = time(NULL);
 		pDate = gmtime(&curr_date);