diff --git a/tests/rftest-rx.c b/tests/rftest-rx.c
index 9c3c4bc30..26d11408c 100644
--- a/tests/rftest-rx.c
+++ b/tests/rftest-rx.c
@@ -50,6 +50,7 @@ void main(void) {
 	reg(UART1_CON) = 0x00000003; /* enable receive and transmit */
 	reg(GPIO_FUNC_SEL0) = ( (0x01 << (14*2)) | (0x01 << (15*2)) ); /* set GPIO15-14 to UART (UART1 TX and RX)*/
 
+	reg(80009000) = 0x00050100;
 
 	reg(MACA_RESET) = 0x3; /* reset, turn on the clock */
 	for(i=0; i<DELAY; i++) { continue; }
diff --git a/tests/rftest-tx.c b/tests/rftest-tx.c
index 1ab05295e..d41916b13 100644
--- a/tests/rftest-tx.c
+++ b/tests/rftest-tx.c
@@ -50,6 +50,8 @@ void main(void) {
 	reg(UART1_CON) = 0x00000003; /* enable receive and transmit */
 	reg(GPIO_FUNC_SEL0) = ( (0x01 << (14*2)) | (0x01 << (15*2)) ); /* set GPIO15-14 to UART (UART1 TX and RX)*/
 
+	reg(80009000) = 0x00050100;
+
 	reg(MACA_RESET) = 0x3; /* reset, turn on the clock */
 	for(i=0; i<DELAY; i++) { continue; }
 	reg(MACA_RESET) = 0x2; /* unreset, turn on the clock */
@@ -73,7 +75,7 @@ void main(void) {
 	while(1) {		
 		puts("\033[H");
 		puts("rftest-tx --- " NL);
-/*
+
 		puts("base +0       +4       +8       +c       +10      +14      +18      +1c      " NL);
 		for (i = 0; i < 96; i ++) { 
 			if ((i & 7) == 0) {
@@ -85,7 +87,7 @@ void main(void) {
 				puts(NL);
 		}
 		puts(NL);
-*/
+
 
 		/* start a sequence */
 		reg(MACA_CONTROL) = 0x00031A03;
diff --git a/tests/uart1-loopback.c b/tests/uart1-loopback.c
index fd6eafdb9..f0bc4b17b 100644
--- a/tests/uart1-loopback.c
+++ b/tests/uart1-loopback.c
@@ -31,12 +31,12 @@ void main(void) {
 
 	uint8_t c;
 	while(1) {
-		*(volatile uint32_t *)UART1_DATA = (uint8_t)'U';
-//		if(*(volatile uint32_t*)UR1CON > 0) {
+//		*(volatile uint32_t *)UART1_DATA = (uint8_t)'U';
+		if(*(volatile uint32_t*)UR1CON > 0) {
 			/* Receive buffer isn't empty */
 			/* read a byte and write it to the transmit buffer */
-//			c = *(volatile uint32_t *)UART1_DATA;
-//			*(volatile uint32_t *)UART1_DATA = c;
-//		}
+			c = *(volatile uint32_t *)UART1_DATA;
+			*(volatile uint32_t *)UART1_DATA = c;
+		}
 	};
 }