diff --git a/test/boost_no_constexpr.ipp b/test/boost_no_constexpr.ipp
index 5084ae03..7b601379 100644
--- a/test/boost_no_constexpr.ipp
+++ b/test/boost_no_constexpr.ipp
@@ -66,6 +66,13 @@ int test()
 {
   int i = square(5);
   quiet_warning(i);
+
+  switch (i)
+  {
+  case a:
+    break;
+  }
+
   return 0;
 }