diff --git a/tests/subsys/dfu/img_util/prj.conf b/tests/subsys/dfu/img_util/prj.conf
index 6beb6b102a0..4f0bc092cef 100644
--- a/tests/subsys/dfu/img_util/prj.conf
+++ b/tests/subsys/dfu/img_util/prj.conf
@@ -7,3 +7,4 @@ CONFIG_IMG_MANAGER=y
 CONFIG_IMG_ENABLE_IMAGE_CHECK=y
 CONFIG_MCUBOOT_IMG_MANAGER=y
 CONFIG_IMG_BLOCK_BUF_SIZE=512
+CONFIG_ZTEST_STACK_SIZE=1536