diff --git a/srsue/test/upper/nas_test.cc b/srsue/test/upper/nas_test.cc
index 4af831f04..fcbc664b4 100644
--- a/srsue/test/upper/nas_test.cc
+++ b/srsue/test/upper/nas_test.cc
@@ -429,8 +429,64 @@ int dedicated_eps_bearer_test()
   return SRSLTE_SUCCESS;
 }
 
+int activate_dedicated_eps_bearer_context_request_test()
+{
+  int ret = SRSLTE_ERROR;
+  srslte::log_filter nas_log("NAS");
+  srslte::log_filter rrc_log("RRC");
+  srslte::log_filter mac_log("MAC");
+  srslte::log_filter usim_log("USIM");
+
+  nas_log.set_level(srslte::LOG_LEVEL_DEBUG);
+  rrc_log.set_level(srslte::LOG_LEVEL_DEBUG);
+  nas_log.set_hex_limit(100000);
+  rrc_log.set_hex_limit(100000);
+
+  rrc_dummy rrc_dummy;
+  gw_dummy gw;
+
+  usim_args_t args;
+  args.algo = "xor";
+  args.imei = "353490069873319";
+  args.imsi = "001010123456789";
+  args.k = "00112233445566778899aabbccddeeff";
+  args.op = "63BFA50EE6523365FF14C1F45F88737D";
+
+  // init USIM
+  srsue::usim usim;
+  bool    net_valid;
+  uint8_t res[16];
+  usim.init(&args, &usim_log);
+
+  srslte::byte_buffer_pool *pool;
+  pool = byte_buffer_pool::get_instance();
+
+  {
+    srsue::nas nas;
+    nas_args_t cfg;
+    cfg.apn_name          = "srslte";
+    nas.init(&usim, &rrc_dummy, &gw, &nas_log, cfg);
+
+    // push ESM info request PDU to NAS to generate response
+    unique_byte_buffer_t tmp = srslte::allocate_unique_buffer(*pool, true);
+    memcpy(tmp->msg, act_ded_bearer_req_pdu, sizeof(act_ded_bearer_req_pdu));
+    tmp->N_bytes = sizeof(act_ded_bearer_req_pdu);
+    nas.write_pdu(LCID, std::move(tmp));
+
+    // check length of generated NAS SDU
+    if (rrc_dummy.get_last_sdu_len() > 3) {
+      ret = SRSLTE_SUCCESS;
+    }
+  }
+
+  pool->cleanup();
+
+  return ret;
+}
+
 int main(int argc, char **argv)
 {
+
   if (security_command_test()) {
     printf("Security command test failed.\n");
     return -1;