diff --git a/bts/BTS_Tests.ttcn b/bts/BTS_Tests.ttcn
index 267d7a3..d3bdd62 100644
--- a/bts/BTS_Tests.ttcn
+++ b/bts/BTS_Tests.ttcn
@@ -1013,6 +1013,42 @@
 	vc_conn.done;
 }
 
+/* Send IPA CRCX twice to inactive lchan */
+function f_TC_ipa_crcx_twice_not_active(charstring id) runs on ConnHdlr {
+	f_rsl_transceive(ts_RSL_IPA_CRCX(g_chan_nr), tr_RSL_IPA_CRCX_ACK(g_chan_nr, ?, ?, ?),
+			 "IPA CRCX ACK");
+	f_rsl_transceive(ts_RSL_IPA_CRCX(g_chan_nr), tr_RSL_IPA_CRCX_NACK(g_chan_nr, RSL_ERR_RES_UNAVAIL),
+			 "IPA CRCX NACK");
+}
+testcase TC_ipa_crcx_twice_not_active() runs on test_CT {
+	var ConnHdlrPars pars := valueof(t_Pars(t_RslChanNr_Bm(1), ts_RSL_ChanMode_SIGN));
+	f_init(testcasename());
+	var ConnHdlr vc_conn := f_start_handler(refers(f_TC_ipa_crcx_twice_not_active), pars);
+	vc_conn.done;
+}
+
+/* Regular sequence of CRCX/MDCX/DLCX */
+function f_TC_ipa_crcx_mdcx_dlcx_not_active(charstring id) runs on ConnHdlr {
+	f_rsl_transceive(ts_RSL_IPA_CRCX(g_chan_nr), tr_RSL_IPA_CRCX_ACK(g_chan_nr, ?, ?, ?),
+			 "IPA CRCX ACK");
+	var uint32_t remote_ip := f_rnd_int(c_UINT32_MAX);
+	var uint16_t remote_port := f_rnd_int(c_UINT16_MAX);
+	var uint7_t rtp_pt2 := f_rnd_int(127);
+	var uint16_t fake_conn_id := 23; /* we're too lazy to read it out from the CRCX ACK above */
+	f_rsl_transceive(ts_RSL_IPA_MDCX(g_chan_nr, fake_conn_id, remote_ip, remote_port, rtp_pt2),
+			 tr_RSL_IPA_MDCX_ACK(g_chan_nr, ?, ?, ?, rtp_pt2),
+			 "IPA MDCX ACK");
+	f_rsl_transceive(ts_RSL_IPA_DLCX(g_chan_nr, fake_conn_id), tr_RSL_IPA_DLCX_ACK(g_chan_nr, ?, ?),
+			 "IPA DLCX ACK");
+}
+testcase TC_ipa_crcx_mdcx_dlcx_not_active() runs on test_CT {
+	var ConnHdlrPars pars := valueof(t_Pars(t_RslChanNr_Bm(1), ts_RSL_ChanMode_SIGN));
+	f_init(testcasename());
+	var ConnHdlr vc_conn := f_start_handler(refers(f_TC_ipa_crcx_mdcx_dlcx_not_active), pars);
+	vc_conn.done;
+}
+
+
 /* TODO Areas:
 
 * channel activation
@@ -1064,6 +1100,8 @@
 	execute( TC_rsl_mand_ie_error() );
 	execute( TC_rsl_ie_content_error() );
 	execute( TC_ipa_dlcx_not_active() );
+	execute( TC_ipa_crcx_twice_not_active() );
+	execute( TC_ipa_crcx_mdcx_dlcx_not_active() );
 }