diff --git a/src/librustc_mir/graphviz.rs b/src/librustc_mir/graphviz.rs
index b80e11a63db7..5d91f63ef52a 100644
--- a/src/librustc_mir/graphviz.rs
+++ b/src/librustc_mir/graphviz.rs
@@ -173,5 +173,3 @@ fn node(block: BasicBlock) -> String {
 fn escape<T: Debug>(t: &T) -> String {
     dot::escape_html(&format!("{:?}", t))
 }
-
-// TODO manually test
diff --git a/src/librustc_mir/pretty.rs b/src/librustc_mir/pretty.rs
index b687c52447cd..7b5dbe72c513 100644
--- a/src/librustc_mir/pretty.rs
+++ b/src/librustc_mir/pretty.rs
@@ -355,5 +355,3 @@ fn write_temp_decls(mir: &Mir, w: &mut Write) -> io::Result<()> {
 
     Ok(())
 }
-
-// TODO manually test