diff --git a/hence/src/lib/lexer.rs b/hence/src/lib/lexer.rs
index b15a625..1260dbe 100644
--- a/hence/src/lib/lexer.rs
+++ b/hence/src/lib/lexer.rs
@@ -279,68 +279,3 @@ pub fn lex(source: &str) -> Result<Vec<Token>> {
 
     Ok(tokens)
 }
-
-#[cfg(test)]
-mod tests {
-    use super::*;
-    use crate::assembler::ToCode;
-
-    #[test]
-    fn test_token_to_assembly() {
-        assert_eq!(
-            Token::Comment(" \"main function\" like definition macro".to_string()).to_code(),
-            "; \"main function\" like definition macro".to_string()
-        );
-        assert_eq!(
-            Token::CharLiteral("\\n".to_string()).to_code(),
-            "'\\n'".to_string()
-        );
-        assert_eq!(
-            Token::MacroLiteral("xyz".to_string()).to_code(),
-            "xyz".to_string()
-        );
-        assert_eq!(
-            Token::Literal("xkcd".to_string()).to_code(),
-            "xkcd".to_string()
-        );
-        assert_eq!(Token::Newline("\n".to_string()).to_code(), "\n".to_string());
-        assert_eq!(
-            Token::Whitespace("     ".to_string()).to_code(),
-            "     ".to_string()
-        );
-    }
-
-    #[test]
-    fn test_lex() -> Result<()> {
-        assert_eq!(
-            lex(";; test".to_string())?,
-            vec![Token::Comment(" test".to_string())]
-        );
-        assert_eq!(
-            lex("@ test".to_string())?,
-            vec![Token::Comment(" test".to_string())]
-        );
-        assert_eq!(
-            lex("# test".to_string())?,
-            vec![Token::Comment(" test".to_string())]
-        );
-        assert_eq!(
-            lex("'\\n'".to_string())?,
-            vec![Token::CharLiteral("\\n".to_string())]
-        );
-        assert_eq!(
-            lex("\"test\"".to_string())?,
-            vec![Token::StringLiteral("test".to_string())]
-        );
-        assert_eq!(
-            lex(".debug CORE_REG_PC".to_string())?,
-            vec![
-                Token::MacroLiteral(".debug".to_string()),
-                Token::Whitespace(" ".to_string()),
-                Token::Literal("CORE_REG_PC".to_string())
-            ]
-        );
-
-        Ok(())
-    }
-}