diff --git a/src/combinators/map.rs b/src/combinators/map.rs
index 0d72d5a..e43d6be 100644
--- a/src/combinators/map.rs
+++ b/src/combinators/map.rs
@@ -6,9 +6,11 @@ where
     P: Parser<I, O1, E>,
     F: Fn(O1) -> O2,
 {
-    move |input| {
+    let rep = parser.representation();
+    let p = move |input| {
         parser
             .parse(input)
             .map(|(result, rest)| (map_fn(result), rest))
-    }
+    };
+    (p, rep)
 }
diff --git a/src/lib.rs b/src/lib.rs
index a42e8d1..acb73d8 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -4,4 +4,4 @@ mod parser;
 pub mod primitives;
 pub mod sequence;
 
-pub use parser::{ParseResult, Parser, ParserInput};
+pub use parser::{ParseResult, Parser, ParserInput, Representation};
diff --git a/src/parser/boxed_parser.rs b/src/parser/boxed_parser.rs
index a2b9712..53509c1 100644
--- a/src/parser/boxed_parser.rs
+++ b/src/parser/boxed_parser.rs
@@ -23,7 +23,7 @@ where
 
 impl<'a, I: ParserInput, O, E> Parser<I, O, E> for BoxedParser<'a, I, O, E> {
     fn representation(&self) -> Representation {
-        Representation::new("NOT IMPL'D")
+        self.inner.representation()
     }
     fn parse(&self, input: I) -> ParseResult<I, O, E> {
         self.inner.parse(input)
diff --git a/src/parser/representation.rs b/src/parser/representation.rs
index 5b7c0c4..f94dd24 100644
--- a/src/parser/representation.rs
+++ b/src/parser/representation.rs
@@ -1,4 +1,4 @@
-#[derive(Debug, Clone)]
+#[derive(Debug, Clone, PartialEq)]
 pub struct Representation {
     val: String,
 }
diff --git a/src/primitives/mod.rs b/src/primitives/mod.rs
index 047fd1d..b005118 100644
--- a/src/primitives/mod.rs
+++ b/src/primitives/mod.rs
@@ -9,11 +9,12 @@ pub fn literal_char(expected: char) -> impl Fn(&str) -> ParseResult<&str, char,
 
 pub fn literal<'a>(expected: &'static str) -> impl Parser<&'a str, &'a str, &'a str> {
     println!("literal call expected: {}", expected);
+    let rep = Representation::new(expected);
     let p = move |input: &'a str| match input.get(0..expected.len()) {
         Some(next) if next == expected => Ok((expected, &input[expected.len()..])),
         _ => Err(input),
     };
-    (p, Representation::new("yolo"))
+    (p, rep)
 }
 
 pub fn any_char(input: &str) -> ParseResult<&str, char, &str> {
diff --git a/tests/json_parser.rs b/tests/json_parser.rs
index da3f391..7732422 100644
--- a/tests/json_parser.rs
+++ b/tests/json_parser.rs
@@ -3,6 +3,7 @@ use parser_combinator::combinators::repeated;
 use parser_combinator::primitives::{any_char, literal, literal_char, one_of, pred};
 use parser_combinator::sequence::seq;
 use parser_combinator::Parser;
+use parser_combinator::Representation;
 
 use proptest::prelude::*;
 
@@ -53,6 +54,7 @@ impl<'a, T, P> JsonParser<'a, T> for P where P: Parser<&'a str, T, &'a str> {}
 fn json_null<'a>() -> impl JsonParser<'a, JsonValue> {
     literal("null").to(JsonValue::Null)
 }
+
 fn json_bool<'a>() -> impl JsonParser<'a, JsonValue> {
     choice((
         literal("true").to(JsonValue::Bool(true)),
@@ -234,3 +236,8 @@ fn parse_json_document() {
     let parsed_json = json_object().parse(test_json);
     assert!(parsed_json.is_ok());
 }
+
+#[test]
+fn test_representations() {
+    assert_eq!(json_null().representation(), Representation::new("null"));
+}