1 files changed, 9 insertions, 2 deletions
diff --git a/src/test/run-pass/generic-tag-alt.rs b/src/test/run-pass/generic-tag-alt.rs
index 1fcf2c38..302096fb 100644
--- a/src/test/run-pass/generic-tag-alt.rs
+++ b/src/test/run-pass/generic-tag-alt.rs
@@ -1,9 +1,16 @@
 type foo[T] = tag(arm(T));
 
 fn altfoo[T](foo[T] f) {
+  auto hit = false;
   alt (f) {
-    case (arm(x)) {}
+    case (arm(x)) {
+      log "in arm";
+      hit = true;
+    }
   }
+  check (hit);
 }
 
-fn main() {}
+fn main() {
+  altfoo[int](arm[int](10));
+}