diff --git a/drivers/net/tg3.c b/drivers/net/tg3.c
index fb168855b2559a39440c0ec0ebd68d96cd6561c2..2bb022ab668250bc4699c354f9c22c7086a9bad4 100644
--- a/drivers/net/tg3.c
+++ b/drivers/net/tg3.c
@@ -8996,7 +8996,7 @@ static int __devinit tg3_do_test_dma(struct tg3 *tp, u32 *buf, dma_addr_t buf_dm
 	return ret;
 }
 
-#define TEST_BUFFER_SIZE	0x400
+#define TEST_BUFFER_SIZE	0x2000
 
 static int __devinit tg3_test_dma(struct tg3 *tp)
 {