diff --git a/src/parse/terms.rs b/src/parse/terms.rs
index a9f3305..eb73a7b 100644
--- a/src/parse/terms.rs
+++ b/src/parse/terms.rs
@@ -702,6 +702,7 @@ mod tests
 		assert_eq!(format_term("f(\na\n+\nb\n,\nc\n+\nd\n)"), "f(a + b, c + d)");
 		assert_eq!(format_term("f( \t a \t + \t b \t , \t c \t + \t d \t)"), "f(a + b, c + d)");
 		assert_eq!(format_term("f( \n a \n + \n b \n , \n c \n + \n d \n)"), "f(a + b, c + d)");
+		// TODO: test other operators
 	}
 
 	#[test]