diff --git a/boards/sim/sim/sim/configs/ostest/defconfig b/boards/sim/sim/sim/configs/ostest/defconfig
new file mode 100644
index 0000000000..37312520c3
--- /dev/null
+++ b/boards/sim/sim/sim/configs/ostest/defconfig
@@ -0,0 +1,32 @@
+#
+# This file is autogenerated: PLEASE DO NOT EDIT IT.
+#
+# You can use "make menuconfig" to make any modifications to the installed .config file.
+# You can then do "make savedefconfig" to generate a new defconfig file that includes your
+# modifications.
+#
+CONFIG_ARCH="sim"
+CONFIG_ARCH_BOARD="sim"
+CONFIG_ARCH_BOARD_SIM=y
+CONFIG_ARCH_CHIP="sim"
+CONFIG_ARCH_SIM=y
+CONFIG_BOARDCTL=y
+CONFIG_BOARDCTL_POWEROFF=y
+CONFIG_BOARD_LOOPSPERMSEC=100
+CONFIG_CANCELLATION_POINTS=y
+CONFIG_DEBUG_SYMBOLS=y
+CONFIG_FS_NAMED_SEMAPHORES=y
+CONFIG_IDLETHREAD_STACKSIZE=4096
+CONFIG_INIT_ENTRYPOINT="ostest_main"
+CONFIG_PTHREAD_CLEANUP=y
+CONFIG_PTHREAD_CLEANUP_STACKSIZE=3
+CONFIG_PTHREAD_MUTEX_TYPES=y
+CONFIG_RAM_START=0x00000000
+CONFIG_SCHED_HAVE_PARENT=y
+CONFIG_SCHED_WAITPID=y
+CONFIG_START_DAY=27
+CONFIG_START_MONTH=2
+CONFIG_START_YEAR=2007
+CONFIG_TESTING_OSTEST=y
+CONFIG_TESTING_OSTEST_LOOPS=5
+CONFIG_TESTING_OSTEST_POWEROFF=y