diff --git a/src/metadata_map.rs b/src/metadata_map.rs
index 97d35d47..6f84b0e7 100644
--- a/src/metadata_map.rs
+++ b/src/metadata_map.rs
@@ -220,7 +220,7 @@ impl MetadataMap {
     ///
     /// assert_eq!(2, map.len());
     ///
-    /// map.append("x-host-ip", "text/html".parse().unwrap());
+    /// map.append("x-mime-type", "text/html".parse().unwrap());
     ///
     /// assert_eq!(3, map.len());
     /// ```
@@ -241,12 +241,12 @@ impl MetadataMap {
     ///
     /// assert_eq!(0, map.keys_len());
     ///
-    /// map.insert("x-host-ip", "127.0.0.1".parse().unwrap());
-    /// map.insert("x-host-name", "localhost".parse().unwrap());
+    /// map.insert("x-mime", "text/plain".parse().unwrap());
+    /// map.insert("x-host", "localhost".parse().unwrap());
     ///
     /// assert_eq!(2, map.keys_len());
     ///
-    /// map.append("x-host-ip", "text/html".parse().unwrap());
+    /// map.insert("x-mime", "text/html".parse().unwrap());
     ///
     /// assert_eq!(2, map.keys_len());
     /// ```