diff --git a/configs/z16f2800100zcog/ostest/defconfig b/configs/z16f2800100zcog/ostest/defconfig
index 4e95b886ad..2c9815678e 100644
--- a/configs/z16f2800100zcog/ostest/defconfig
+++ b/configs/z16f2800100zcog/ostest/defconfig
@@ -144,7 +144,7 @@ CONFIG_DEBUG_VERBOSE=n
 CONFIG_MM_REGIONS=1
 CONFIG_ARCH_LOWPUTC=n
 CONFIG_ARCH_LOWGETC=n
-CONFIG_RR_INTERVAL=0
+CONFIG_RR_INTERVAL=200
 CONFIG_SCHED_INSTRUMENTATION=n
 CONFIG_TASK_NAME_SIZE=0
 CONFIG_START_YEAR=2008
@@ -172,7 +172,7 @@ CONFIG_DEV_LOWCONSOLE=y
 CONFIG_DISABLE_CLOCK=n
 CONFIG_DISABLE_POSIX_TIMERS=n
 CONFIG_DISABLE_PTHREAD=n
-CONFIG_DISABLE_SIGNALS=y
+CONFIG_DISABLE_SIGNALS=n
 CONFIG_DISABLE_MQUEUE=n
 CONFIG_DISABLE_MOUNTPOINT=n
 CONFIG_DISABLE_ENVIRON=n
@@ -331,8 +331,8 @@ CONFIG_EXAMPLES_NSH_NETMASK=(255<<24|255<<16|255<<8|0)
 #
 CONFIG_BOOT_FROM_FLASH=n
 CONFIG_CUSTOM_STACK=n
-CONFIG_PROC_STACK_SIZE=1024
+CONFIG_PROC_STACK_SIZE=4096
 CONFIG_PTHREAD_STACK_MIN=256
-CONFIG_PTHREAD_STACK_DEFAULT=1024
+CONFIG_PTHREAD_STACK_DEFAULT=4096
 CONFIG_HEAP_SIZE=
 CONFIG_HEAP_BASE=