diff --git a/tests/test-mvariant.c b/tests/test-mvariant.c
index 484d1cb5..3cee92e4 100644
--- a/tests/test-mvariant.c
+++ b/tests/test-mvariant.c
@@ -85,7 +85,10 @@ static void test_pair(void)
   assert (pair_key_p(p));
   i = pair_get_key(p);
   assert (*i == 15);
-  
+
+  pair_clean(p);
+  assert (pair_empty_p(p));
+
   pair_clear(p2);
   pair_clear(p);
 }