diff --git a/src/header/common/access_control_allow_headers.rs b/src/header/common/access_control_allow_headers.rs
index a5cc169d..3820bc34 100644
--- a/src/header/common/access_control_allow_headers.rs
+++ b/src/header/common/access_control_allow_headers.rs
@@ -7,7 +7,17 @@ header! {
     #[doc="The `Access-Control-Allow-Headers` header indicates, as part of the"]
     #[doc="response to a preflight request, which header field names can be used"]
     #[doc="during the actual request."]
+    #[doc=""]
+    #[doc="# ABNF"]
+    #[doc="```plain"]
+    #[doc="Access-Control-Allow-Headers: \"Access-Control-Allow-Headers\" \":\" #field-name"]
+    #[doc="```"]
+    #[doc=""]
+    #[doc="# Example values"]
+    #[doc="* `accept-language, date`"]
     (AccessControlAllowHeaders, "Access-Control-Allow-Headers") => (UniCase<String>)*
-    
-    test_access_control_allow_headers {}
+
+    test_access_control_allow_headers {
+        test_header!(test1, vec![b"accept-language, date"]);
+    }
 }
diff --git a/src/header/common/access_control_allow_methods.rs b/src/header/common/access_control_allow_methods.rs
index da22eb45..40fb63d1 100644
--- a/src/header/common/access_control_allow_methods.rs
+++ b/src/header/common/access_control_allow_methods.rs
@@ -7,7 +7,17 @@ header! {
     #[doc="The `Access-Control-Allow-Methods` header indicates, as part of the"]
     #[doc="response to a preflight request, which methods can be used during the"]
     #[doc="actual request."]
+    #[doc=""]
+    #[doc="# ABNF"]
+    #[doc="```plain"]
+    #[doc="Access-Control-Allow-Methods: \"Access-Control-Allow-Methods\" \":\" #Method"]
+    #[doc="```"]
+    #[doc=""]
+    #[doc="# Example values"]
+    #[doc="* `PUT, DELETE, XMODIFY`"]
     (AccessControlAllowMethods, "Access-Control-Allow-Methods") => (Method)*
 
-    test_access_control_allow_methods {}
+    test_access_control_allow_methods {
+        test_header!(test1, vec![b"PUT, DELETE, XMODIFY"]);
+    }
 }
diff --git a/src/header/common/access_control_allow_origin.rs b/src/header/common/access_control_allow_origin.rs
index 30920450..bf84b20f 100644
--- a/src/header/common/access_control_allow_origin.rs
+++ b/src/header/common/access_control_allow_origin.rs
@@ -1,17 +1,22 @@
-use std::fmt::{self};
+use std::fmt;
 use std::str;
 
 use url::Url;
 use header;
 
 /// The `Access-Control-Allow-Origin` response header,
-/// part of [CORS](http://www.w3.org/TR/cors/).
+/// part of [CORS](www.w3.org/TR/cors/#access-control-allow-origin-response-header)
 ///
-/// > The `Access-Control-Allow-Origin` header indicates whether a resource
-/// > can be shared based by returning the value of the Origin request header,
-/// > "*", or "null" in the response.
+/// The `Access-Control-Allow-Origin` header indicates whether a resource
+/// can be shared based by returning the value of the Origin request header,
+/// "*", or "null" in the response.
 ///
-/// Spec: www.w3.org/TR/cors/#access-control-allow-origin-response-header
+/// # ABNF
+/// ```plain
+/// Access-Control-Allow-Origin = "Access-Control-Allow-Origin" ":" origin-list-or-null | "*"
+/// ```
+// FIXME: The documentation says differently (missing "null" value, "*" not used in practice,
+// orgin list no list but single value)
 #[derive(Clone, PartialEq, Debug)]
 pub enum AccessControlAllowOrigin {
     /// Allow all origins
diff --git a/src/header/common/access_control_max_age.rs b/src/header/common/access_control_max_age.rs
index 036f14e1..6cd88cc2 100644
--- a/src/header/common/access_control_max_age.rs
+++ b/src/header/common/access_control_max_age.rs
@@ -4,7 +4,17 @@ header! {
     #[doc=""]
     #[doc="The `Access-Control-Max-Age` header indicates how long the results of a"]
     #[doc="preflight request can be cached in a preflight result cache."]
+    #[doc=""]
+    #[doc="# ABNF"]
+    #[doc="```plain"]
+    #[doc="Access-Control-Max-Age = \"Access-Control-Max-Age\" \":\" delta-seconds"]
+    #[doc="```"]
+    #[doc=""]
+    #[doc="# Example values"]
+    #[doc="* `531`"]
     (AccessControlMaxAge, "Access-Control-Max-Age") => [u32]
 
-    test_access_control_max_age {}
+    test_access_control_max_age {
+        test_header!(test1, vec![b"531"]);
+    }
 }
diff --git a/src/header/common/access_control_request_headers.rs b/src/header/common/access_control_request_headers.rs
index 0bb09377..35f3ddc2 100644
--- a/src/header/common/access_control_request_headers.rs
+++ b/src/header/common/access_control_request_headers.rs
@@ -7,7 +7,17 @@ header! {
     #[doc="The `Access-Control-Request-Headers` header indicates which headers will"]
     #[doc="be used in the actual request as part of the preflight request."]
     #[doc="during the actual request."]
+    #[doc=""]
+    #[doc="# ABNF"]
+    #[doc="```plain"]
+    #[doc="Access-Control-Allow-Headers: \"Access-Control-Allow-Headers\" \":\" #field-name"]
+    #[doc="```"]
+    #[doc=""]
+    #[doc="# Example values"]
+    #[doc="* `accept-language, date`"]
     (AccessControlRequestHeaders, "Access-Control-Request-Headers") => (UniCase<String>)*
 
-    test_access_control_request_headers {}
+    test_access_control_request_headers {
+        test_header!(test1, vec![b"accept-language, date"]);
+    }
 }
diff --git a/src/header/common/access_control_request_method.rs b/src/header/common/access_control_request_method.rs
index 30f0c152..3ba96754 100644
--- a/src/header/common/access_control_request_method.rs
+++ b/src/header/common/access_control_request_method.rs
@@ -6,7 +6,16 @@ header! {
     #[doc=""]
     #[doc="The `Access-Control-Request-Method` header indicates which method will be"]
     #[doc="used in the actual request as part of the preflight request."]
+    #[doc="# ABNF"]
+    #[doc="```plain"]
+    #[doc="Access-Control-Request-Method: \"Access-Control-Request-Method\" \":\" Method"]
+    #[doc="```"]
+    #[doc=""]
+    #[doc="# Example values"]
+    #[doc="* `GET`"]
     (AccessControlRequestMethod, "Access-Control-Request-Method") => [Method]
 
-    test_access_control_request_method {}
+    test_access_control_request_method {
+        test_header!(test1, vec![b"GET"]);
+    }
 }