diff --git a/jpegut.c b/jpegut.c
index 70f4fc89..e94d6352 100644
--- a/jpegut.c
+++ b/jpegut.c
@@ -601,16 +601,16 @@ int main(int argc, char *argv[])
 	if(doyuv)
 	{
 		yuv=YUVDECODE;
-		dotest(48, 48, 3, TJ_444, "test");
-		dotest(35, 39, 3, TJ_444, "test");
-		dotest(48, 48, 3, TJ_422, "test");
-		dotest(39, 41, 3, TJ_422, "test");
-		dotest(48, 48, 3, TJ_420, "test");
-		dotest(41, 35, 3, TJ_420, "test");
-		dotest(48, 48, 3, TJ_GRAYSCALE, "test");
-		dotest(35, 39, 3, TJ_GRAYSCALE, "test");
-		dotest(48, 48, 1, TJ_GRAYSCALE, "test");
-		dotest(39, 41, 1, TJ_GRAYSCALE, "test");
+		dotest(48, 48, 3, TJ_444, "test_yuv0");
+		dotest(35, 39, 3, TJ_444, "test_yuv1");
+		dotest(48, 48, 3, TJ_422, "test_yuv0");
+		dotest(39, 41, 3, TJ_422, "test_yuv1");
+		dotest(48, 48, 3, TJ_420, "test_yuv0");
+		dotest(41, 35, 3, TJ_420, "test_yuv1");
+		dotest(48, 48, 3, TJ_GRAYSCALE, "test_yuv0");
+		dotest(35, 39, 3, TJ_GRAYSCALE, "test_yuv1");
+		dotest(48, 48, 1, TJ_GRAYSCALE, "test_yuv0");
+		dotest(39, 41, 1, TJ_GRAYSCALE, "test_yuv1");
 	}
 
 	return exitstatus;