diff --git a/srsue/test/ttcn3/hdr/lte_ttcn3_phy.h b/srsue/test/ttcn3/hdr/lte_ttcn3_phy.h
index 389a207ce..75ef2efc3 100644
--- a/srsue/test/ttcn3/hdr/lte_ttcn3_phy.h
+++ b/srsue/test/ttcn3/hdr/lte_ttcn3_phy.h
@@ -134,6 +134,8 @@ private:
 
   std::mutex mutex;
 
+  srslte::task_scheduler task_sched;
+
   uint32_t ra_trans_cnt = 0;
 
   stack_interface_phy_lte* stack  = nullptr;
diff --git a/srsue/test/ttcn3/src/lte_ttcn3_phy.cc b/srsue/test/ttcn3/src/lte_ttcn3_phy.cc
index aa46513a1..2d2635e72 100644
--- a/srsue/test/ttcn3/src/lte_ttcn3_phy.cc
+++ b/srsue/test/ttcn3/src/lte_ttcn3_phy.cc
@@ -83,12 +83,14 @@ void lte_ttcn3_phy::set_activation_deactivation_scell(uint32_t cmd)
 bool lte_ttcn3_phy::set_config(srslte::phy_cfg_t config, uint32_t cc_idx_)
 {
   log.debug("%s not implemented.\n", __FUNCTION__);
+  task_sched.defer_task([this]() { stack->set_config_complete(true); });
   return true;
 }
 
 bool lte_ttcn3_phy::set_scell(srslte_cell_t cell_info, uint32_t cc_idx, uint32_t earfcn)
 {
   log.debug("%s not implemented.\n", __FUNCTION__);
+  task_sched.defer_task([this]() { stack->set_scell_complete(true); });
   return true;
 }
 
@@ -390,6 +392,8 @@ void lte_ttcn3_phy::run_tti()
     sr_pending = false;
     sr_tx_tti  = current_tti;
   }
+
+  task_sched.run_pending_tasks();
 }
 
 void lte_ttcn3_phy::set_cells_to_meas(uint32_t earfcn, const std::set<uint32_t>& pci)