diff --git a/gbproxy/GBProxy_Tests.ttcn b/gbproxy/GBProxy_Tests.ttcn
index 035a47d..f569eaf 100644
--- a/gbproxy/GBProxy_Tests.ttcn
+++ b/gbproxy/GBProxy_Tests.ttcn
@@ -1158,6 +1158,21 @@
 	setverdict(pass);
 }
 
+private function f_disable_ns_pcu(integer pcu_idx) runs on test_CT
+{
+	var integer i;
+
+	connect(self:NS_CTRL, g_pcu[pcu_idx].vc_NS:NS_CTRL);
+	for (i := 0; i < lengthof(mp_nsconfig_pcu[pcu_idx].nsvc); i := i + 1) {
+		var uint16_t nsvci := mp_nsconfig_pcu[pcu_idx].nsvc[i].nsvci;
+		var NsDisableVcRequest tx_disar;
+		tx_disar.nsvci := nsvci;
+		log(tx_disar);
+		NS_CTRL.send(tx_disar);
+	}
+	disconnect(self:NS_CTRL, g_pcu[pcu_idx].vc_NS:NS_CTRL);
+}
+
 testcase TC_ul_unitdata_pool_failure() runs on test_CT
 {
 	var integer i;
@@ -2707,6 +2722,7 @@
 	deactivate(d);
 	setverdict(pass);
 }
+
 /* Send a BVC-RESET for a PTP BVC from the SGSN side: expect it to propagate */
 testcase TC_bvc_reset_ptp_from_sgsn() runs on test_CT
 {
@@ -2716,6 +2732,41 @@
 	f_cleanup();
 }
 
+/* Send a BVC-RESET for a blocked PTP BVC from the SGSN side: expect NS-STATUS with cause BVCI unknown */
+testcase TC_bvc_reset_blocked_ptp_from_sgsn() runs on GlobalTest_CT
+{
+	f_init();
+	f_global_init();
+	f_sleep(3.0);
+	/* Make sure NS for BVC is down and try again */
+	f_disable_ns_pcu(0);
+	f_sleep(10.0);
+
+	var BssgpBvcConfig bvc_cfg := g_pcu[0].cfg.bvc[0];
+	SGSN_MGMT.send(BssgpResetRequest:{cause:=BSSGP_CAUSE_OM_INTERVENTION}) to f_get_sgsn_bvc_ct(0, bvc_cfg.bvci);
+
+	/* Check for NS-STATUS with BVCI unknown, ignore other messages */
+	var template (present) PDU_BSSGP exp_rx :=
+		tr_BSSGP_STATUS(bvc_cfg.bvci, BSSGP_CAUSE_BVCI_UNKNOWN, ?);
+
+	alt {
+	[] G_SGSN[0].receive(exp_rx) {
+		setverdict(pass);
+		}
+	[] SGSN_MGMT.receive(BssgpStatusIndication:{*, bvc_cfg.bvci, BVC_S_UNBLOCKED}) {
+		setverdict(fail, "BVC unblocked that should be gone on BSS side");
+	}
+	[] SGSN_MGMT.receive {
+		repeat;
+	}
+	[] G_SGSN[0].receive {
+		repeat;
+	}
+	}
+
+	f_cleanup();
+}
+
 private altstep as_ignore_mgmt(BSSGP_BVC_MGMT_PT pt) {
 	[] pt.receive {repeat; }
 }
@@ -3531,6 +3582,7 @@
 	execute( TC_bvc_reset_ptp_from_bss() );
 	execute( TC_bvc_reset_sig_from_bss() );
 	execute( TC_bvc_reset_ptp_from_sgsn() );
+	execute( TC_bvc_reset_blocked_ptp_from_sgsn() );
 	execute( TC_bvc_reset_sig_from_sgsn() );
 	if (mp_enable_bss_load_sharing) {
 		/* don't enable this by default, as we don't yet have any automatic test setup for FR with 4 NS-VC */