diff --git a/configs/pic32-starterkit/ostest/defconfig b/configs/pic32-starterkit/ostest/defconfig
index f88505a5c09..1f3ca99c1df 100644
--- a/configs/pic32-starterkit/ostest/defconfig
+++ b/configs/pic32-starterkit/ostest/defconfig
@@ -185,24 +185,52 @@ CONFIG_PIC32MX_ICESEL=0
 #
 CONFIG_UART1_SERIAL_CONSOLE=n
 CONFIG_UART2_SERIAL_CONSOLE=y
+CONFIG_UART3_SERIAL_CONSOLE=n
+CONFIG_UART4_SERIAL_CONSOLE=n
+CONFIG_UART5_SERIAL_CONSOLE=n
+CONFIG_UART6_SERIAL_CONSOLE=n
 
 CONFIG_UART1_TXBUFSIZE=256
 CONFIG_UART2_TXBUFSIZE=256
+CONFIG_UART3_TXBUFSIZE=256
+CONFIG_UART4_TXBUFSIZE=256
+CONFIG_UART5_TXBUFSIZE=256
+CONFIG_UART6_TXBUFSIZE=256
 
 CONFIG_UART1_RXBUFSIZE=256
 CONFIG_UART2_RXBUFSIZE=256
+CONFIG_UART3_RXBUFSIZE=256
+CONFIG_UART4_RXBUFSIZE=256
+CONFIG_UART5_RXBUFSIZE=256
+CONFIG_UART6_RXBUFSIZE=256
 
 CONFIG_UART1_BAUD=115200
 CONFIG_UART2_BAUD=115200
+CONFIG_UART3_BAUD=115200
+CONFIG_UART4_BAUD=115200
+CONFIG_UART5_BAUD=115200
+CONFIG_UART6_BAUD=115200
 
 CONFIG_UART1_BITS=8
 CONFIG_UART2_BITS=8
+CONFIG_UART3_BITS=8
+CONFIG_UART4_BITS=8
+CONFIG_UART5_BITS=8
+CONFIG_UART6_BITS=8
 
 CONFIG_UART1_PARITY=0
 CONFIG_UART2_PARITY=0
+CONFIG_UART3_PARITY=0
+CONFIG_UART4_PARITY=0
+CONFIG_UART5_PARITY=0
+CONFIG_UART6_PARITY=0
 
 CONFIG_UART1_2STOP=0
 CONFIG_UART2_2STOP=0
+CONFIG_UART3_2STOP=0
+CONFIG_UART4_2STOP=0
+CONFIG_UART5_2STOP=0
+CONFIG_UART6_2STOP=0
 
 #
 # General build options