diff --git a/src/sys/block_group.rs b/src/sys/block_group.rs
index 14bff9b..70c6ab2 100644
--- a/src/sys/block_group.rs
+++ b/src/sys/block_group.rs
@@ -1,11 +1,4 @@
-#[cfg(test)]
-use std::mem;
-#[cfg(test)]
-use std::slice;
-
-#[cfg(not(test))]
 use core::mem;
-#[cfg(not(test))]
 use core::slice;
 
 use error::Error;
@@ -52,11 +45,9 @@ impl BlockGroupDescriptor {
             return Err(Error::OutOfBounds(end));
         }
 
-        let ptr = unsafe {
-            haystack.as_mut_ptr().offset(offset as isize)
-                as *mut BlockGroupDescriptor
-        };
-        let slice = unsafe { slice::from_raw_parts_mut(ptr, count) };
+        let ptr = haystack.as_mut_ptr().offset(offset as isize)
+            as *mut BlockGroupDescriptor;
+        let slice = slice::from_raw_parts_mut(ptr, count);
         Ok(slice)
     }
 }
@@ -70,8 +61,9 @@ mod tests {
         let mut buffer = vec![0_u8; 4096];
         let addr = &buffer[2048] as *const _ as usize;
         // magic
-        let table =
-            BlockGroupDescriptor::find_descriptor_table(&mut buffer, 0, 0);
+        let table = unsafe {
+            BlockGroupDescriptor::find_descriptor_table(&mut buffer, 0, 0)
+        };
         assert!(
             table.is_ok(),
             "Err({:?})",
diff --git a/src/sys/superblock.rs b/src/sys/superblock.rs
index 1a26b9b..e89a66c 100644
--- a/src/sys/superblock.rs
+++ b/src/sys/superblock.rs
@@ -1,7 +1,3 @@
-#[cfg(test)]
-use std::mem;
-
-#[cfg(not(test))]
 use core::mem;
 
 use error::Error;
@@ -157,7 +153,7 @@ impl Superblock {
             return Err(Error::OutOfBounds(end));
         }
 
-        let superblock: &mut Superblock = unsafe {
+        let superblock: &mut Superblock = {
             let ptr = haystack.as_mut_ptr().offset(offset as isize)
                 as *mut Superblock;
             ptr.as_mut().unwrap()
@@ -251,7 +247,7 @@ mod tests {
         // magic
         buffer[1024 + 56] = EXT2_MAGIC as u8;
         buffer[1024 + 57] = (EXT2_MAGIC >> 8) as u8;
-        let superblock = Superblock::find(&mut buffer, 0);
+        let superblock = unsafe { Superblock::find(&mut buffer, 0) };
         assert!(
             superblock.is_ok(),
             "Err({:?})",