diff --git a/drivers/bluetooth/hci/Kconfig b/drivers/bluetooth/hci/Kconfig
index 8a50caa92f0..195faef0985 100644
--- a/drivers/bluetooth/hci/Kconfig
+++ b/drivers/bluetooth/hci/Kconfig
@@ -99,6 +99,7 @@ config BT_PSOC6_BLESS
 
 config BT_NO_DRIVER
 	bool "No default HCI driver"
+	select BT_HAS_HCI_VS
 	help
 	  This is intended for unit tests where no internal driver
 	  should be selected.
diff --git a/subsys/testsuite/boards/unit_testing/unit_testing/Kconfig.defconfig b/subsys/testsuite/boards/unit_testing/unit_testing/Kconfig.defconfig
index b2efdb2bee7..939f1c97e71 100644
--- a/subsys/testsuite/boards/unit_testing/unit_testing/Kconfig.defconfig
+++ b/subsys/testsuite/boards/unit_testing/unit_testing/Kconfig.defconfig
@@ -2,4 +2,7 @@
 #
 # Copyright (c) 2022 Nordic Semiconductor
 
-# Intentionally left empty
+# Bluetooth unit tests expect this backend
+choice BT_HCI_BUS_TYPE
+	default BT_NO_DRIVER
+endchoice