diff --git a/.travis/script.sh b/.travis/script.sh
index c816b0834..254c46ec8 100755
--- a/.travis/script.sh
+++ b/.travis/script.sh
@@ -100,11 +100,12 @@ set -x
     git checkout -- . || die
     git clean -xfd || die
     ./bootstrap || die
-    COMMISSIONER=1 JOINER=1 DHCP6_CLIENT=1 DHCP6_SERVER=1 DNS_CLIENT=1 make -f examples/Makefile-nrf52840 || die
+    BORDER_ROUTER=1 COAP=1 COMMISSIONER=1 DHCP6_CLIENT=1 DHCP6_SERVER=1 DNS_CLIENT=1 FULL_LOGS=1 JOINER=1 MAC_FILTER=1 MTD_NETDIAG=1 SERVICE=1 TMF_PROXY=1 make -f examples/Makefile-nrf52840 || die
     arm-none-eabi-size  output/nrf52840/bin/ot-cli-ftd || die
     arm-none-eabi-size  output/nrf52840/bin/ot-cli-mtd || die
     arm-none-eabi-size  output/nrf52840/bin/ot-ncp-ftd || die
     arm-none-eabi-size  output/nrf52840/bin/ot-ncp-mtd || die
+    arm-none-eabi-size  output/nrf52840/bin/ot-ncp-radio || die
 
     git checkout -- . || die
     git clean -xfd || die
@@ -168,11 +169,12 @@ set -x
     git checkout -- . || die
     git clean -xfd || die
     ./bootstrap || die
-    COMMISSIONER=1 JOINER=1 DHCP6_CLIENT=1 DHCP6_SERVER=1 DNS_CLIENT=1 make -f examples/Makefile-nrf52840 || die
+    BORDER_ROUTER=1 COAP=1 COMMISSIONER=1 DHCP6_CLIENT=1 DHCP6_SERVER=1 DNS_CLIENT=1 FULL_LOGS=1 JOINER=1 MAC_FILTER=1 MTD_NETDIAG=1 SERVICE=1 TMF_PROXY=1 make -f examples/Makefile-nrf52840 || die
     arm-none-eabi-size  output/nrf52840/bin/ot-cli-ftd || die
     arm-none-eabi-size  output/nrf52840/bin/ot-cli-mtd || die
     arm-none-eabi-size  output/nrf52840/bin/ot-ncp-ftd || die
     arm-none-eabi-size  output/nrf52840/bin/ot-ncp-mtd || die
+    arm-none-eabi-size  output/nrf52840/bin/ot-ncp-radio || die
 
     git checkout -- . || die
     git clean -xfd || die
@@ -236,11 +238,12 @@ set -x
     git checkout -- . || die
     git clean -xfd || die
     ./bootstrap || die
-    COMMISSIONER=1 JOINER=1 DHCP6_CLIENT=1 DHCP6_SERVER=1 DNS_CLIENT=1 make -f examples/Makefile-nrf52840 || die
+    BORDER_ROUTER=1 COAP=1 COMMISSIONER=1 DHCP6_CLIENT=1 DHCP6_SERVER=1 DNS_CLIENT=1 FULL_LOGS=1 JOINER=1 MAC_FILTER=1 MTD_NETDIAG=1 SERVICE=1 TMF_PROXY=1 make -f examples/Makefile-nrf52840 || die
     arm-none-eabi-size  output/nrf52840/bin/ot-cli-ftd || die
     arm-none-eabi-size  output/nrf52840/bin/ot-cli-mtd || die
     arm-none-eabi-size  output/nrf52840/bin/ot-ncp-ftd || die
     arm-none-eabi-size  output/nrf52840/bin/ot-ncp-mtd || die
+    arm-none-eabi-size  output/nrf52840/bin/ot-ncp-radio || die
 
     git checkout -- . || die
     git clean -xfd || die
@@ -315,11 +318,12 @@ set -x
     git checkout -- . || die
     git clean -xfd || die
     ./bootstrap || die
-    COMMISSIONER=1 JOINER=1 DHCP6_CLIENT=1 DHCP6_SERVER=1 DNS_CLIENT=1 make -f examples/Makefile-nrf52840 || die
+    BORDER_ROUTER=1 COAP=1 COMMISSIONER=1 DHCP6_CLIENT=1 DHCP6_SERVER=1 DNS_CLIENT=1 FULL_LOGS=1 JOINER=1 MAC_FILTER=1 MTD_NETDIAG=1 SERVICE=1 TMF_PROXY=1 make -f examples/Makefile-nrf52840 || die
     arm-none-eabi-size  output/nrf52840/bin/ot-cli-ftd || die
     arm-none-eabi-size  output/nrf52840/bin/ot-cli-mtd || die
     arm-none-eabi-size  output/nrf52840/bin/ot-ncp-ftd || die
     arm-none-eabi-size  output/nrf52840/bin/ot-ncp-mtd || die
+    arm-none-eabi-size  output/nrf52840/bin/ot-ncp-radio || die
 
     git checkout -- . || die
     git clean -xfd || die
diff --git a/examples/platforms/nrf52840/openthread-core-nrf52840-config.h b/examples/platforms/nrf52840/openthread-core-nrf52840-config.h
index f53caa5ca..1aeda9fe9 100644
--- a/examples/platforms/nrf52840/openthread-core-nrf52840-config.h
+++ b/examples/platforms/nrf52840/openthread-core-nrf52840-config.h
@@ -90,7 +90,9 @@
  * Define to prepend the log level to all log messages
  *
  */
+#ifndef OPENTHREAD_CONFIG_LOG_PREPEND_LEVEL
 #define OPENTHREAD_CONFIG_LOG_PREPEND_LEVEL                     0
+#endif
 
  /**
   * @def OPENTHREAD_CONFIG_ENABLE_SOFTWARE_ACK_TIMEOUT