diff --git a/tests/already_exists_error/bool.jou b/tests/already_exists_error/bool.jou
new file mode 100644
index 00000000..6bd869c4
--- /dev/null
+++ b/tests/already_exists_error/bool.jou
@@ -0,0 +1,2 @@
+def foo() -> None:
+    x = True.asdf() # Error: a bool type named 'True' already exists