diff --git a/bsc/BSC_Tests.ttcn b/bsc/BSC_Tests.ttcn
index 4cbc256..251801b 100644
--- a/bsc/BSC_Tests.ttcn
+++ b/bsc/BSC_Tests.ttcn
@@ -3711,7 +3711,8 @@
 	f_vty_amr_start_mode_restore(false);
 }
 
-function f_TC_assignment_codec_amr(boolean fr, octetstring mrconf, bitstring s8_s0, bitstring exp_s8_s0)
+function f_TC_assignment_codec_amr(boolean fr, octetstring mrconf, bitstring s8_s0, bitstring exp_s8_s0,
+	charstring start_mode := "1")
 runs on test_CT {
 
 	var TestHdlrParams pars := f_gen_test_hdlr_pars();
@@ -3737,7 +3738,7 @@
 
 	f_init(1, true);
 	f_allow_amr_rate_4_75k_5_90k_7_40k_12_20k();
-	f_vty_amr_start_mode_set(fr, "1");
+	f_vty_amr_start_mode_set(fr, start_mode);
 	f_sleep(1.0);
 
 	vc_conn := f_start_handler(refers(f_TC_assignment_codec), pars);
@@ -3886,6 +3887,16 @@
 	f_shutdown_helper();
 }
 
+testcase TC_assignment_codec_amr_f_start_mode_auto() runs on test_CT {
+	f_TC_assignment_codec_amr(true, '209520882208'O, '11111111'B, '00000010'B,
+		start_mode := "auto");
+}
+
+testcase TC_assignment_codec_amr_h_start_mode_auto() runs on test_CT {
+	f_TC_assignment_codec_amr(false, '2015208820'O, '10010101'B, '00010101'B,
+		start_mode := "auto");
+}
+
 private function f_disable_all_tch_f() runs on test_CT {
 	f_vty_transceive(BSCVTY, "bts 0 trx 0 timeslot 1 sub-slot 0 borken");
 	f_vty_transceive(BSCVTY, "bts 0 trx 0 timeslot 2 sub-slot 0 borken");
@@ -8402,6 +8413,8 @@
 		execute( TC_assignment_codec_amr_f_zero() );
 		execute( TC_assignment_codec_amr_f_unsupp() );
 		execute( TC_assignment_codec_amr_h_S7() );
+		execute( TC_assignment_codec_amr_f_start_mode_auto() );
+		execute( TC_assignment_codec_amr_h_start_mode_auto() );
 	}
 
 	execute( TC_assignment_codec_fr_exhausted_req_hr() );