--- a/crates/jsonnet-parser/src/lib.rs
+++ b/crates/jsonnet-parser/src/lib.rs
@@ -195,7 +195,7 @@
 		rule slice_part(s: &ParserSettings) -> Option<LocExpr>
 			= e:(_ e:expr(s) _{e})? {e}
 		pub rule slice_desc(s: &ParserSettings) -> SliceDesc
-			= start:slice_part(s) ":" pair:(end:slice_part(s) ":" step:slice_part(s) {(end, step)})? {
+			= start:slice_part(s) ":" pair:(end:slice_part(s) step:(":" e:slice_part(s){e})? {(end, step.flatten())})? {
 				let (end, step) = if let Some((end, step)) = pair {
 					(end, step)
 				}else{
@@ -357,10 +357,11 @@
 
 	#[test]
 	fn slice() {
-		println!("{:?}", parse!("a[1:]"));
-		println!("{:?}", parse!("a[1::]"));
-		println!("{:?}", parse!("a[:1:]"));
-		println!("{:?}", parse!("a[::1]"));
+		parse!("a[1:]");
+		parse!("a[1::]");
+		parse!("a[:1:]");
+		parse!("a[::1]");
+		parse!("str[:len - 1]");
 	}
 
 	#[test]