diff --git a/test.py b/test.py
index 32c5d97..abc3fc9 100644
--- a/test.py
+++ b/test.py
@@ -1,9 +1,12 @@
 import importlib
+from pathlib import Path
 
 from lexer.annotations import AnnotationLexer
+from lexer.midas import MidasLexer
 from lexer.token import Token
 
 
+# Frame annotation
 mod = importlib.import_module("examples.00_syntax_prototype.01_simple_types")
 
 annotation: str = mod.__annotations__["df"]
@@ -12,4 +15,14 @@ tokens: list[Token] = lexer.process()
 print([
     f"{t.type.name}('{t.lexeme}')"
     for t in tokens
-])
\ No newline at end of file
+])
+
+# Midas type definitions
+path: Path = Path("examples") / "00_syntax_prototype" / "02_custom_types.midas"
+definitions: str = path.read_text()
+midas_lexer: MidasLexer = MidasLexer(definitions, path.name)
+tokens = midas_lexer.process()
+print([
+    f"{t.type.name}('{t.lexeme}')"
+    for t in tokens
+])