diff --git a/src/main.rs b/src/main.rs
--- a/src/main.rs
+++ b/src/main.rs
@@ -2,7 +2,7 @@ use regexp::Regexp;
 
 fn main() {
 	let tests = ["", "a", "ab", "aabb", "abab", "abcd", "abcbcdbcd"];
-	for pattern in ["*", "((a)", "a)", "+a"] {
+	for pattern in ["a(b|c)", "a*b*", "a+b+", "(ab)*", "(ab)+", "a((bc)*d)*"] {
 		println!("# {pattern}");
 		let r = match Regexp::new(&pattern.to_string()) {
 			Ok(r1) => r1.determinize(),