diff --git a/src/volcano.test.c b/src/volcano.test.c
index 91411b660..05b058e2d 100644
--- a/src/volcano.test.c
+++ b/src/volcano.test.c
@@ -21,6 +21,7 @@ static void test_volcano_update(CuTest *tc) {
     r = test_create_region(0, 0, t_active);
     a_add(&r->attribs, make_reduceproduction(25, 10));
     volcano_update();
+    CuAssertPtrNotNull(tc, test_find_messagetype(r->msgs, "volcanostopsmoke"));
     CuAssertPtrEquals(tc, (void *)t_volcano, (void *)r->terrain);
     test_cleanup();
 }