diff --git a/README.md b/README.md
index 52c144c..2d28633 100644
--- a/README.md
+++ b/README.md
@@ -112,11 +112,11 @@ CANnectivity supports USB Device Firmware Upgrade
 with boards without an on-board programmer.
 
 To build CANnectivity with MCUboot integration for USB DFU use
-[sysbuild](https://docs.zephyrproject.org/latest/build/sysbuild/index.html) with the
-`sysbuild-dfu.conf` configuration file when building for your board (here `frdm_k64f`):
+[sysbuild](https://docs.zephyrproject.org/latest/build/sysbuild/index.html) when building for your
+board (here `frdm_k64f`):
 
 ```shell
-west build -b frdm_k64f/mk64f12  --sysbuild cannectivity/app/ -- -DSB_CONF_FILE=sysbuild-dfu.conf
+west build -b frdm_k64f/mk64f12 --sysbuild cannectivity/app/
 ```
 
 After building, MCUboot and the CANnectivity firmware can be flashed to the board by running the
diff --git a/app/sample.yaml b/app/sample.yaml
index 4ecb88c..fb5bafb 100644
--- a/app/sample.yaml
+++ b/app/sample.yaml
@@ -113,7 +113,6 @@ tests:
       - canbardo
     extra_args:
       - FILE_SUFFIX=legacy
-      - SB_CONF_FILE=sysbuild-dfu.conf
   app.cannectivity.dfu:
     sysbuild: true
     depends_on:
@@ -124,5 +123,3 @@ tests:
       - frdm_k64f
       - frdm_mcxn947/mcxn947/cpu0
       - lpcxpresso55s16
-    extra_args:
-      - SB_CONF_FILE=sysbuild-dfu.conf
diff --git a/app/sysbuild-dfu.conf b/app/sysbuild.conf
similarity index 100%
rename from app/sysbuild-dfu.conf
rename to app/sysbuild.conf
diff --git a/doc/building.rst b/doc/building.rst
index b88aed1..4847dca 100644
--- a/doc/building.rst
+++ b/doc/building.rst
@@ -47,12 +47,11 @@ CANnectivity supports USB :external+zephyr:ref:`Device Firmware Upgrade <dfu>` (
 `MCUboot`_ bootloader. This is intended for use with boards without an on-board programmer.
 
 To build CANnectivity with MCUboot integration for USB DFU use :external+zephyr:ref:`sysbuild
-<sysbuild>` with the ``sysbuild-dfu.conf`` configuration file when building for your board (here
-``frdm_k64f``):
+<sysbuild>` when building for your board (here ``frdm_k64f``):
 
 .. code-block:: console
 
-   west build -b frdm_k64f/mk64f12  --sysbuild ../custom/cannectivity/app/ -- -DSB_CONF_FILE=sysbuild-dfu.conf
+   west build -b frdm_k64f/mk64f12 --sysbuild ../custom/cannectivity/app/
 
 After building, MCUboot and the CANnectivity firmware can be flashed to the board by running the
 ``west flash`` command.