diff --git a/src/ex_node.rs b/src/ex_node.rs
index d9aa8f594baefcd577c04ae0f3caa2e6acb9fb26..ee745e57bf4a438ce52a16745524c7d3d178c2d9 100644
--- a/src/ex_node.rs
+++ b/src/ex_node.rs
@@ -53,6 +53,6 @@ impl ops::DerefMut for ExNode {
 }
 
 #[test]
-fn ex_node_size_test(){
+fn ex_node_size_test() {
     assert_eq!(mem::size_of::<ExNode>(), 512);
 }
diff --git a/src/header.rs b/src/header.rs
index 83175fb7132a6930ab9a1083cca4a89cb31cf642..589339a00b02ff00635ca932c7e89a6c82eef6d8 100644
--- a/src/header.rs
+++ b/src/header.rs
@@ -8,7 +8,7 @@ pub struct Header {
     pub signature: [u8; 8],
     /// Version, should be 1
     pub version: u64,
-    /// Disk ID, a 128-byte unique identifier
+    /// Disk ID, a 128-bit unique identifier
     pub uuid: [u8; 16],
     /// Disk size, in 512-byte sectors
     pub size: u64,
@@ -84,6 +84,6 @@ impl DerefMut for Header {
 }
 
 #[test]
-fn header_size_test(){
+fn header_size_test() {
     assert_eq!(mem::size_of::<Header>(), 512);
 }
diff --git a/src/node.rs b/src/node.rs
index 56a1b975e359d57653d891d18be1b6c93b08eb5c..2c87fcc838f311e78df5e1eb7860a1365eeff754 100644
--- a/src/node.rs
+++ b/src/node.rs
@@ -125,6 +125,6 @@ impl ops::DerefMut for Node {
 }
 
 #[test]
-fn node_size_test(){
+fn node_size_test() {
     assert_eq!(mem::size_of::<Node>(), 512);
 }