diff --git a/src/filemap.rs b/src/filemap.rs
index c6af9a701848..64c892a09297 100644
--- a/src/filemap.rs
+++ b/src/filemap.rs
@@ -80,11 +80,11 @@ pub fn write_system_newlines<T>(writer: T,
     }
 }
 
-fn write_file<T>(text: &StringBuffer,
-                 filename: &str,
-                 out: &mut T,
-                 config: &Config)
-                 -> Result<Option<String>, io::Error>
+pub fn write_file<T>(text: &StringBuffer,
+                     filename: &str,
+                     out: &mut T,
+                     config: &Config)
+                     -> Result<Option<String>, io::Error>
     where T: Write
 {
 
diff --git a/src/lib.rs b/src/lib.rs
index 942fdb06994c..b825059ee208 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -49,7 +49,7 @@ pub use self::summary::Summary;
 mod utils;
 pub mod config;
 pub mod filemap;
-mod visitor;
+pub mod visitor;
 mod checkstyle;
 mod items;
 mod missed_spans;
@@ -61,7 +61,7 @@ mod issues;
 mod rewrite;
 mod string;
 mod comment;
-mod modules;
+pub mod modules;
 pub mod rustfmt_diff;
 mod chains;
 mod macros;