diff --git a/exercises/collections/mod.rs b/exercises/collections/mod.rs
index ee2b4423..f46c1424 100644
--- a/exercises/collections/mod.rs
+++ b/exercises/collections/mod.rs
@@ -1 +1,4 @@
-mod closures1;
+mod hashmap1;
+mod hashmap2;
+mod vec1;
+mod vec2;