diff --git a/src/mac.rs b/src/mac.rs
index cd47382..7ce214d 100644
--- a/src/mac.rs
+++ b/src/mac.rs
@@ -22,3 +22,15 @@ impl MacAddress {
         &self.addr
     }
 }
+
+
+#[cfg(test)]
+mod test {
+    use super::*;
+
+    #[test]
+    fn test_mac_from_string() {
+        let mac = MacAddress::from_string("a:bb:cc:dd:ee:ff").unwrap();
+        assert_eq!(&[0xa, 0xbb, 0xcc, 0xdd, 0xee, 0xff], mac.as_bytes());
+    }
+}