diff --git a/src/test/run-pass/box-in-tup.rs b/src/test/run-pass/box-in-tup.rs
new file mode 100644
index 00000000000..53f3dc0ffa2
--- /dev/null
+++ b/src/test/run-pass/box-in-tup.rs
@@ -0,0 +1,4 @@
+fn main() {
+  let tup(mutable @int) i = tup(mutable @10);
+  i._0 = @11;
+}
\ No newline at end of file
diff --git a/src/test/run-pass/vec-in-tup.rs b/src/test/run-pass/vec-in-tup.rs
new file mode 100644
index 00000000000..415554dd374
--- /dev/null
+++ b/src/test/run-pass/vec-in-tup.rs
@@ -0,0 +1,4 @@
+fn main() {
+  let tup(mutable vec[int]) i = tup(mutable vec(1,2,3));
+  i._0 = vec(4,5,6);
+}