diff --git a/src/syntax/lexer.rs b/src/syntax/lexer.rs
index e84617b..aeb1392 100644
--- a/src/syntax/lexer.rs
+++ b/src/syntax/lexer.rs
@@ -18,7 +18,7 @@ pub enum Token<'a> {
     Quote,
 
     #[token("#")]
-    Octothrope,
+    Octothorpe,
 
     // Values
     #[regex("\"(\\.|[^\"])*\"", (lex_slice::<1, 1>))]
@@ -56,7 +56,7 @@ impl<'a> Display for Token<'a> {
             Token::RightParen => write!(f, ")"),
             Token::Dot => write!(f, "."),
             Token::Quote => write!(f, "'"),
-            Token::Octothrope => write!(f, "#"),
+            Token::Octothorpe => write!(f, "#"),
             Token::String(s) => write!(f, "\"{s}\""),
             Token::Number(n) => write!(f, "{n}"),
             Token::Symbol(sym) => write!(f, "{sym}"),
@@ -82,7 +82,7 @@ mod tests {
                 LeftParen,
                 RightParen,
                 Quote,
-                Octothrope,
+                Octothorpe,
                 String("ABLE"),
                 Symbol("corp"),
                 Keyword("wisp"),
diff --git a/src/syntax/parser.rs b/src/syntax/parser.rs
index c08cd5e..bc16f55 100644
--- a/src/syntax/parser.rs
+++ b/src/syntax/parser.rs
@@ -26,7 +26,7 @@ fn parser<'a>() -> impl Parser<Token<'a>, Vec<Spanned<Expr<'a>>>, Error = Simple
             .repeated()
             .delimited_by(just(Token::LeftParen), just(Token::RightParen));
 
-        let vector = just(Token::Octothrope)
+        let vector = just(Token::Octothorpe)
             .ignore_then(list.clone())
             .map(Expr::Vector);
 
@@ -60,7 +60,36 @@ fn parser<'a>() -> impl Parser<Token<'a>, Vec<Spanned<Expr<'a>>>, Error = Simple
 mod tests {
     use super::*;
 
-    fn assert_parse<'a>(src: &'a str, expected: &'a [Spanned<Expr<'a>>]) {
-        assert_eq!(parse(src).unwrap(), expected);
+    #[test]
+    fn function() {
+        assert_eq!(
+            parse(r#"(defun hello (name) (log (concat "Hello, " name "!")))"#).unwrap(),
+            &[Spanned::new(
+                Expr::List(vec![
+                    Spanned::new(Expr::Symbol("defun".into()), 1..6),
+                    Spanned::new(Expr::Symbol("hello".into()), 7..12),
+                    Spanned::new(
+                        Expr::List(vec![Spanned::new(Expr::Symbol("name".into()), 14..18),]),
+                        13..19,
+                    ),
+                    Spanned::new(
+                        Expr::List(vec![
+                            Spanned::new(Expr::Symbol("log".into()), 21..24),
+                            Spanned::new(
+                                Expr::List(vec![
+                                    Spanned::new(Expr::Symbol("concat".into()), 26..32),
+                                    Spanned::new(Expr::String("Hello, ".into()), 33..42),
+                                    Spanned::new(Expr::Symbol("name".into()), 43..47),
+                                    Spanned::new(Expr::String("!".into()), 48..51),
+                                ]),
+                                48..51
+                            )
+                        ]),
+                        20..53
+                    )
+                ]),
+                0..54,
+            )]
+        );
     }
 }