diff --git a/tests/tbf/TbfTest.cpp b/tests/tbf/TbfTest.cpp
index 04e711c..096b071 100644
--- a/tests/tbf/TbfTest.cpp
+++ b/tests/tbf/TbfTest.cpp
@@ -277,8 +277,8 @@
 		llc_data[i] = i%256;
 
 	/* Schedule two LLC frames */
-	dl_tbf->append_data(ms_class, 1000, llc_data, sizeof(llc_data));
-	dl_tbf->append_data(ms_class, 1000, llc_data, sizeof(llc_data));
+	dl_tbf->append_data(1000, llc_data, sizeof(llc_data));
+	dl_tbf->append_data(1000, llc_data, sizeof(llc_data));
 
 
 	/* Send only a few RLC/MAC blocks */
@@ -362,8 +362,8 @@
 	OSMO_ASSERT(dl_tbf->state_is(GPRS_RLCMAC_FLOW));
 
 	/* Schedule two LLC frames */
-	dl_tbf->append_data(ms_class, 1000, llc_data, sizeof(llc_data));
-	dl_tbf->append_data(ms_class, 1000, llc_data, sizeof(llc_data));
+	dl_tbf->append_data(1000, llc_data, sizeof(llc_data));
+	dl_tbf->append_data(1000, llc_data, sizeof(llc_data));
 
 	OSMO_ASSERT(dl_tbf->state_is(GPRS_RLCMAC_FLOW));
 
@@ -2668,7 +2668,7 @@
 	OSMO_ASSERT(dl_tbf->state_is(GPRS_RLCMAC_FLOW));
 
 	/* Schedule a small LLC frame */
-	dl_tbf->append_data(ms_class, 1000, test_data, 10);
+	dl_tbf->append_data(1000, test_data, 10);
 
 	OSMO_ASSERT(dl_tbf->state_is(GPRS_RLCMAC_FLOW));
 
@@ -2678,7 +2678,7 @@
 		request_dl_rlc_block(dl_tbf, &fn);
 
 	/* Schedule a large LLC frame */
-	dl_tbf->append_data(ms_class, 1000, test_data, sizeof(test_data));
+	dl_tbf->append_data(1000, test_data, sizeof(test_data));
 
 	OSMO_ASSERT(dl_tbf->state_is(GPRS_RLCMAC_FLOW));
 
@@ -2726,7 +2726,7 @@
 	 * 2 RLC data blocks. Which are enough to test Header Type 1
 	 * cases
 	 */
-	dl_tbf->append_data(ms_class, 1000, test_data, 100);
+	dl_tbf->append_data(1000, test_data, 100);
 
 	OSMO_ASSERT(dl_tbf->state_is(GPRS_RLCMAC_FLOW));