diff --git a/tests/common/mod.rs b/tests/common/mod.rs
index bb16ab7..bb4a88c 100644
--- a/tests/common/mod.rs
+++ b/tests/common/mod.rs
@@ -5,6 +5,7 @@ extern crate embedded_hal_mock as hal;
 use self::hal::i2c::{ Mock as I2cMock, Transaction as I2cTrans };
 use self::hal::spi::{ Mock as SpiMock, Transaction as SpiTrans };
 
+#[allow(unused)]
 pub const DEVICE_ADDRESS   : u8 = 0b110_1000;
 #[allow(unused)]
 pub const CONTROL_POR_VALUE: u8 = 0b0001_1100;