diff --git a/bsc/BSC_Tests.ttcn b/bsc/BSC_Tests.ttcn
index d1f5c3d..160d662 100644
--- a/bsc/BSC_Tests.ttcn
+++ b/bsc/BSC_Tests.ttcn
@@ -1212,9 +1212,9 @@
 
 	ass_cmd.pdu.bssmap.assignmentRequest.channelType := valueof(ts_BSSMAP_IE_ChannelType);
 	ass_cmd.pdu.bssmap.assignmentRequest.codecList := valueof(ts_BSSMAP_IE_CodecList({ts_CodecFR}));
-	ass_cmd.pdu.bssmap.assignmentRequest.encryptionInformation :=
-							valueof(ts_BSSMAP_IE_EncrInfo(kc, '01'O));
+
 	f_establish_fully(pars, ass_cmd, exp_compl);
+	f_cipher_mode('01'O, kc);
 }
 
 testcase TC_assignment_fr_a5_0() runs on test_CT {
@@ -1239,10 +1239,9 @@
 
 	ass_cmd.pdu.bssmap.assignmentRequest.channelType := valueof(ts_BSSMAP_IE_ChannelType);
 	ass_cmd.pdu.bssmap.assignmentRequest.codecList := valueof(ts_BSSMAP_IE_CodecList({ts_CodecFR}));
-	ass_cmd.pdu.bssmap.assignmentRequest.encryptionInformation :=
-							valueof(ts_BSSMAP_IE_EncrInfo(kc, '02'O));
 
 	f_establish_fully(pars, ass_cmd, exp_compl);
+	f_cipher_mode('02'O, kc);
 }
 
 testcase TC_assignment_fr_a5_1() runs on test_CT {
@@ -1264,8 +1263,6 @@
 	const OCT8 kc := '0001020304050607'O;
 
 	ass_cmd.pdu.bssmap.assignmentRequest.channelType := valueof(ts_BSSMAP_IE_ChannelType);
-	ass_cmd.pdu.bssmap.assignmentRequest.encryptionInformation :=
-							valueof(ts_BSSMAP_IE_EncrInfo(kc, '02'O));
 	f_establish_fully(pars, ass_cmd, exp_fail);
 }
 
@@ -1289,9 +1286,9 @@
 
 	ass_cmd.pdu.bssmap.assignmentRequest.channelType := valueof(ts_BSSMAP_IE_ChannelType);
 	ass_cmd.pdu.bssmap.assignmentRequest.codecList := valueof(ts_BSSMAP_IE_CodecList({ts_CodecFR}));
-	ass_cmd.pdu.bssmap.assignmentRequest.encryptionInformation :=
-							valueof(ts_BSSMAP_IE_EncrInfo(kc, '08'O));
+
 	f_establish_fully(pars, ass_cmd, exp_compl);
+	f_cipher_mode('08'O, kc);
 }
 
 testcase TC_assignment_fr_a5_3() runs on test_CT {
@@ -1315,11 +1312,9 @@
 
 	ass_cmd.pdu.bssmap.assignmentRequest.channelType := valueof(ts_BSSMAP_IE_ChannelType);
 	ass_cmd.pdu.bssmap.assignmentRequest.codecList := valueof(ts_BSSMAP_IE_CodecList({ts_CodecFR}));
-	ass_cmd.pdu.bssmap.assignmentRequest.encryptionInformation :=
-							valueof(ts_BSSMAP_IE_EncrInfo(kc, '10'O));
-	ass_cmd.pdu.bssmap.assignmentRequest.kC128 := valueof(ts_BSSMAP_IE_Kc128(kc128));
 	/* TODO: expect GSM0808_CAUSE_CIPHERING_ALGORITHM_NOT_SUPPORTED cause value */
 	f_establish_fully(pars, ass_cmd, exp_fail);
+	f_cipher_mode('10'O, kc, kc128);
 }
 
 testcase TC_assignment_fr_a5_4() runs on test_CT {