diff --git a/tests/llc/LlcTest.cpp b/tests/llc/LlcTest.cpp
index 3083644..13bda3c 100644
--- a/tests/llc/LlcTest.cpp
+++ b/tests/llc/LlcTest.cpp
@@ -61,7 +61,6 @@
 	size_t len, const gprs_llc_queue::MetaInfo *exp_info = 0)
 {
 	struct msgb *llc_msg;
-	uint8_t *msg_data;
 	const gprs_llc_queue::MetaInfo *info_res;
 
 	llc_msg = queue->dequeue(&info_res);
@@ -70,10 +69,8 @@
 	fprintf(stderr, "dequeued msg, length %u (expected %zu), data %s\n",
 		msgb_length(llc_msg), len, msgb_hexdump(llc_msg));
 
-	OSMO_ASSERT(msgb_length(llc_msg) == len);
-	msg_data = msgb_data(llc_msg);
-
-	OSMO_ASSERT(memcmp(msg_data, exp_data, len) == 0);
+	if (!msgb_eq_data_print(llc_msg, exp_data, len))
+		fprintf(stderr, "check failed!\n");
 
 	if (exp_info)
 		OSMO_ASSERT(memcmp(exp_info, info_res, sizeof(*exp_info)) == 0);
@@ -229,7 +226,7 @@
 	log_set_use_color(osmo_stderr_target, 0);
 	log_set_print_filename(osmo_stderr_target, 0);
 	log_set_log_level(osmo_stderr_target, LOGL_INFO);
-	log_parse_category_mask(osmo_stderr_target, "DPCU,3");
+	log_parse_category_mask(osmo_stderr_target, "DPCU,3:DLGLOBAL,1:");
 
 	vty_init(&pcu_vty_info);
 	pcu_vty_init(&gprs_log_info);
diff --git a/tests/rlcmac/RLCMACTest.cpp b/tests/rlcmac/RLCMACTest.cpp
index bf7a605..61026ed 100644
--- a/tests/rlcmac/RLCMACTest.cpp
+++ b/tests/rlcmac/RLCMACTest.cpp
@@ -33,6 +33,7 @@
 #include <osmocom/vty/telnet_interface.h>
 #include <osmocom/vty/logging.h>
 #include <osmocom/core/utils.h>
+#include <osmocom/core/msgb.h>
 #include <osmocom/core/application.h>
 }
 using namespace std;
@@ -216,6 +217,8 @@
 
 void testCsnLeftAlignedVarBmpBounds(void *test_ctx)
 {
+	struct msgb *m = msgb_alloc(80, "test");
+	static uint8_t exp[] = { 0x7f, 0xff, 0xff, 0xee, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00 };
 	bitvec *vector = bitvec_alloc(23, test_ctx);
 
 	bitvec_unhex(vector, "40200bffd161003e0e519ffffffb800000000000000000");
@@ -225,14 +228,17 @@
 		&data.u.Egprs_Packet_Downlink_Ack_Nack.EGPRS_AckNack.Desc;
 	decode_gsm_rlcmac_uplink(vector, &data);
 
-	OSMO_ASSERT(!strcmp(osmo_hexdump(urbb->URBB, 13),
-			    "7f ff ff ee 00 00 00 00 00 00 00 00 00 "));
+	memcpy(msgb_put(m, 13), urbb->URBB, 13);
+	if (!msgb_eq_data_print(m, exp, 13))
+		printf("%s failed!\n", __func__);
+	msgb_free(m);
 }
 
 int main(int argc, char *argv[])
 {
 	void *ctx = talloc_named_const(NULL, 1, "RLCMACTest");
 	osmo_init_logging2(ctx, &gprs_log_info);
+	log_parse_category_mask(osmo_stderr_target, "DPCU,3:DLGLOBAL,1:");
 
 	//printSizeofRLCMAC();
 	testRlcMacDownlink(ctx);
diff --git a/tests/tbf/TbfTest.cpp b/tests/tbf/TbfTest.cpp
index dfed79e..ff73d90 100644
--- a/tests/tbf/TbfTest.cpp
+++ b/tests/tbf/TbfTest.cpp
@@ -527,12 +527,21 @@
 	struct msgb *msg;
 	int fn = 0;
 	uint8_t expected_data = 1;
+	static uint8_t exp[][GSM_MACBLOCK_LEN] = {
+		{ 0x07, 0x00, 0x00, 0x4d, 0x01, 0x01, 0x01,
+		  0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01 },
+		{ 0x07, 0x00, 0x02, 0x4d, 0x02, 0x02, 0x02,
+		  0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02, 0x02 },
+		{ 0x07, 0x01, 0x04, 0x4d, 0x03, 0x03, 0x03,
+		  0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03, 0x03 },
+	};
 
 	while (ms->dl_tbf()->have_data()) {
 		msg = ms->dl_tbf()->create_dl_acked_block(fn += 4, 7);
 		fprintf(stderr, "MSG = %s\n", msgb_hexdump(msg));
-		OSMO_ASSERT(msgb_length(msg) == 23);
-		OSMO_ASSERT(msgb_data(msg)[10] == expected_data);
+		if (!msgb_eq_data_print(msg, exp[expected_data - 1], GSM_MACBLOCK_LEN))
+			printf("%s failed at %u\n", __func__, expected_data);
+
 		expected_data += 1;
 	}
 	OSMO_ASSERT(expected_data-1 == 3);
@@ -732,9 +741,14 @@
 
 	struct msgb *msg1 = ul_tbf->create_ul_ack(*fn, ts_no);
 
-	OSMO_ASSERT(!strcmp(osmo_hexdump(msg1->data, msg1->data_len),
-	"40 24 01 3f 3e 24 46 68 90 87 b0 06 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b "
-	));
+	static uint8_t exp1[] = { 0x40, 0x24, 0x01, 0x3f, 0x3e, 0x24, 0x46, 0x68, 0x90, 0x87, 0xb0, 0x06,
+				  0x2b, 0x2b, 0x2b, 0x2b, 0x2b, 0x2b, 0x2b, 0x2b, 0x2b, 0x2b, 0x2b
+	};
+
+	if (!msgb_eq_data_print(msg1, exp1, GSM_MACBLOCK_LEN)) {
+		printf("%s test failed on 1st segment!\n", __func__);
+		return NULL;
+	}
 
 	egprs3->si = 0;
 	egprs3->r = 1;
@@ -754,10 +768,14 @@
 
 	msg1 = ul_tbf->create_ul_ack(*fn, ts_no);
 
-	OSMO_ASSERT(!strcmp(osmo_hexdump(msg1->data, msg1->data_len),
-	"40 24 01 3f 3e 24 46 68 90 88 b0 06 8b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b "
-	));
+	static uint8_t exp2[] = { 0x40, 0x24, 0x01, 0x3f, 0x3e, 0x24, 0x46, 0x68, 0x90, 0x88, 0xb0, 0x06, 0x8b,
+				  0x2b, 0x2b, 0x2b, 0x2b, 0x2b, 0x2b, 0x2b, 0x2b, 0x2b, 0x2b
+	};
 
+	if (!msgb_eq_data_print(msg1, exp2, GSM_MACBLOCK_LEN)) {
+		printf("%s test failed on 2nd segment!\n", __func__);
+		return NULL;
+	}
 	return ul_tbf;
 }
 
@@ -3205,6 +3223,10 @@
 {
 	BTS the_bts;
 	uint32_t tlli = 0xffeeddcc;
+	static uint8_t exp[] = { 0x40, 0x84, 0x7f, 0xf7, 0x6e, 0xe6, 0x41, 0x4b,
+				 0x2b, 0x2b, 0x2b, 0x2b, 0x2b, 0x2b, 0x2b, 0x2b,
+				 0x2b, 0x2b, 0x2b, 0x2b, 0x2b, 0x2b, 0x2b
+	};
 
 	printf("=== start %s ===\n", __func__);
 	setup_bts(&the_bts, 4);
@@ -3217,8 +3239,9 @@
 	printf("packet reject: %s\n",
 			osmo_hexdump(msg->data, 23));
 
-	OSMO_ASSERT(!strcmp(osmo_hexdump(msg->data, 23),
-			    "40 84 7f f7 6e e6 41 4b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b 2b "));
+	if (!msgb_eq_data_print(msg, exp, GSM_MACBLOCK_LEN))
+		printf("%s test failed!\n", __func__);
+
 	printf("=== end %s ===\n", __func__);
 
 }