diff --git a/boards/nordic/nrf54h20dk/nrf54h20dk_nrf54h20_cpuapp.dts b/boards/nordic/nrf54h20dk/nrf54h20dk_nrf54h20_cpuapp.dts
index 9325b63a7a1d7..95d557bf944de 100644
--- a/boards/nordic/nrf54h20dk/nrf54h20dk_nrf54h20_cpuapp.dts
+++ b/boards/nordic/nrf54h20dk/nrf54h20dk_nrf54h20_cpuapp.dts
@@ -143,11 +143,16 @@
 };
 
 &cpusec_cpuapp_ipc {
+	status = "okay";
 	mbox-names = "tx", "rx";
 	tx-region = <&cpuapp_cpusec_ipc_shm>;
 	rx-region = <&cpusec_cpuapp_ipc_shm>;
 };
 
+&cpusec_bellboard {
+	status = "okay";
+};
+
 ipc0: &cpuapp_cpurad_ipc {
 	status = "okay";
 	mbox-names = "rx", "tx";
diff --git a/boards/nordic/nrf54h20dk/nrf54h20dk_nrf54h20_cpurad.dts b/boards/nordic/nrf54h20dk/nrf54h20dk_nrf54h20_cpurad.dts
index cb8fb9e1a0260..49ca847873f74 100644
--- a/boards/nordic/nrf54h20dk/nrf54h20dk_nrf54h20_cpurad.dts
+++ b/boards/nordic/nrf54h20dk/nrf54h20dk_nrf54h20_cpurad.dts
@@ -38,6 +38,10 @@
 	status = "okay";
 };
 
+&cpurad_ram0x_region {
+	status = "okay";
+};
+
 &cpurad_bellboard {
 	status = "okay";
 	interrupts = <96 NRF_DEFAULT_IRQ_PRIORITY>;
@@ -55,11 +59,16 @@
 };
 
 &cpusec_cpurad_ipc {
+	status = "okay";
 	mbox-names = "tx", "rx";
 	tx-region = <&cpurad_cpusec_ipc_shm>;
 	rx-region = <&cpusec_cpurad_ipc_shm>;
 };
 
+&cpusec_bellboard {
+	status = "okay";
+};
+
 ipc0: &cpuapp_cpurad_ipc {
 	status = "okay";
 	mbox-names = "tx", "rx";
diff --git a/tests/arch/arm/arm_thread_swap/boards/nrf54h20dk_nrf54h20_cpuapp.overlay b/tests/arch/arm/arm_thread_swap/boards/nrf54h20dk_nrf54h20_cpuapp.overlay
new file mode 100644
index 0000000000000..f9615d1b35ecd
--- /dev/null
+++ b/tests/arch/arm/arm_thread_swap/boards/nrf54h20dk_nrf54h20_cpuapp.overlay
@@ -0,0 +1,9 @@
+/* SPDX-License-Identifier: Apache-2.0 */
+
+&cpusec_cpuapp_ipc {
+	status = "disabled";
+};
+
+&cpusec_bellboard {
+	status = "disabled";
+};