diff --git a/nimble/controller/test/syscfg.yml b/nimble/controller/test/syscfg.yml
index 979e7a026..217575c09 100644
--- a/nimble/controller/test/syscfg.yml
+++ b/nimble/controller/test/syscfg.yml
@@ -20,3 +20,6 @@
 
 syscfg.vals:
     BLE_LL_CFG_FEAT_LE_CSA2: 1
+
+    # Prevent priority conflict with controller task.
+    MCU_UART_POLLER_PRIO: 16
diff --git a/nimble/host/mesh/syscfg.yml b/nimble/host/mesh/syscfg.yml
index 63622de3f..59905f877 100644
--- a/nimble/host/mesh/syscfg.yml
+++ b/nimble/host/mesh/syscfg.yml
@@ -104,6 +104,7 @@ syscfg.defs:
     BLE_MESH_ADV_TASK_PRIO:
         description: >
             Advertising task prio (FIXME)
+        type: task_priority
         value: 9
 
     BLE_MESH_MSG_CACHE_SIZE:
diff --git a/nimble/transport/emspi/syscfg.yml b/nimble/transport/emspi/syscfg.yml
index 066deb7f1..193944aaa 100644
--- a/nimble/transport/emspi/syscfg.yml
+++ b/nimble/transport/emspi/syscfg.yml
@@ -85,6 +85,7 @@ syscfg.defs:
 
     BLE_HCI_EMSPI_PRIO:
         description: The priority of the emspi task.
+        type: task_priority
         value: 5
 
     BLE_HCI_EMSPI_STACK_SIZE:
diff --git a/nimble/transport/socket/syscfg.yml b/nimble/transport/socket/syscfg.yml
index 530850064..f3b8bb611 100644
--- a/nimble/transport/socket/syscfg.yml
+++ b/nimble/transport/socket/syscfg.yml
@@ -66,6 +66,7 @@ syscfg.defs:
 
     BLE_SOCK_TASK_PRIO:
         description: 'Priority of the HCI socket task.'
+        type: task_priority
         value: 9
 
     BLE_SOCK_STACK_SIZE: