diff --git a/pcu/PCU_Tests.ttcn b/pcu/PCU_Tests.ttcn
index 22e3c1f..fb59c13 100644
--- a/pcu/PCU_Tests.ttcn
+++ b/pcu/PCU_Tests.ttcn
@@ -7,7 +7,7 @@
    those NS and BSSGP implementations on the BSS (PCU) side. */
 
 /* (C) 2018-2019 Harald Welte <laforge@gnumonks.org>
- * (C) 2019 Vadim Yanitskiy <axilirator@gmail.com>
+ * (C) 2019-2020 Vadim Yanitskiy <axilirator@gmail.com>
  * All rights reserved.
  *
  * Released under the terms of GNU General Public License, Version 2 or
@@ -1764,6 +1764,74 @@
 	f_shutdown(__BFILE__, __LINE__, final := true);
 }
 
+private function f_TC_egprs_pkt_chan_req_reject(bitstring ra11, uint32_t fn,
+						template IARRestOctets rest := ?,
+						PCUIF_BurstType bt := BURST_TYPE_1)
+runs on RAW_PCU_Test_CT {
+	var template ReqRefWaitInd tr_ref;
+	var GsmRrMessage rr_msg;
+	var boolean ok;
+
+	/* Send RACH.ind with malformed EGPRS Packet Channel Request */
+	BTS.send(ts_PCUIF_RACH_IND(bts_nr := 0, trx_nr := 0, ts_nr := 0,
+				   ra := bit2int(ra11), is_11bit := 1,
+				   burst_type := bt, fn := fn,
+				   arfcn := 871));
+
+	/* Abuse f_pcuif_rx_imm_ass(): wait for Immediate Assignment Reject */
+	ok := f_pcuif_rx_imm_ass(rr_msg, t_imm_ass := tr_IMM_ASS_REJ);
+	if (not ok) {
+		setverdict(fail, "Failed to match Immediate Assignment Reject");
+		f_shutdown(__BFILE__, __LINE__);
+	}
+
+	/* Just to have a short-name reference to the actual message */
+	var ImmediateAssignmentReject iar := rr_msg.payload.imm_ass_rej;
+
+	/* Make sure that Request Reference list contains at least one entry
+	 * with our TDMA frame number, and RA is set to 'reserved' value 127. */
+	tr_ref := tr_ReqRefWaitInd(f_compute_ReqRef(127, fn));
+	if (not match(iar.payload, { *, tr_ref, * })) {
+		setverdict(fail, "Request Reference list does not match");
+		f_shutdown(__BFILE__, __LINE__);
+	}
+
+	/* Match Feature Indicator (must indicate PS domain) */
+	if (not match(iar.feature_ind, FeatureIndicator:{?, false, true})) {
+		setverdict(fail, "Feature Indicator does not match");
+		f_shutdown(__BFILE__, __LINE__);
+	}
+
+	/* Match IAR Rest Octets */
+	if (not match(iar.rest_octets, rest)) {
+		setverdict(fail, "IAR Rest Octets does not match: ",
+			   iar.rest_octets, " vs expected ", rest);
+		f_shutdown(__BFILE__, __LINE__);
+	}
+
+	setverdict(pass);
+}
+
+/* Verify the contents of RR Immediate Assignment Reject message and its
+ * Rest Octets sent in response to EGPRS Packet Channel Request (11 bit). */
+testcase TC_egprs_pkt_chan_req_reject_content() runs on RAW_PCU_Test_CT {
+	var template IARRestOctets rest;
+	var BIT5 ext_ra;
+
+	/* Initialize the PCU interface abstraction */
+	f_init_raw(testcasename());
+
+	for (var integer i := 0; i < 6; i := i + 1) {
+		ext_ra := int2bit(f_rnd_int(32), 5); /* 5 LSB's of RA11 */
+		rest := tr_IARRestOctets({ *, tr_ExtRAOpt(ext_ra), * });
+
+		/* Intentionally incorrect message (see table 11.2.5a.2) */
+		f_TC_egprs_pkt_chan_req_reject('111111'B & ext_ra, 1337 + i, rest);
+	}
+
+	f_shutdown(__BFILE__, __LINE__, final := true);
+}
+
 control {
 	execute( TC_pcuif_suspend() );
 	execute( TC_ta_ptcch_idle() );
@@ -1796,6 +1864,7 @@
 	execute( TC_egprs_pkt_chan_req_signalling() );
 	execute( TC_egprs_pkt_chan_req_one_phase() );
 	execute( TC_egprs_pkt_chan_req_two_phase() );
+	execute( TC_egprs_pkt_chan_req_reject_content() );
 
 	execute( TC_mo_ping_pong_with_ul_racap_egprs_only() );
 }