diff --git a/test/common_type_2_test.cpp b/test/common_type_2_test.cpp
index 99ada63..8a4e746 100644
--- a/test/common_type_2_test.cpp
+++ b/test/common_type_2_test.cpp
@@ -90,13 +90,18 @@ TT_TEST_BEGIN(common_type)
 #ifndef __SUNPRO_CC
     assignation_2<C1C2, C1>();
     typedef tt::common_type<C1C2&, C1&>::type T1;
+	BOOST_CHECK_TYPE(T1, C1C2);
     typedef tt::common_type<C3*, C2*>::type T2;
+	BOOST_CHECK_TYPE(T2, C2*);
     typedef tt::common_type<int*, int const*>::type T3;
+	BOOST_CHECK_TYPE(T3, int const*);
 #if defined(BOOST_NO_CXX11_DECLTYPE) && !defined(BOOST_COMMON_TYPE_DONT_USE_TYPEOF)
     // fails if BOOST_COMMON_TYPE_DONT_USE_TYPEOF:
     typedef tt::common_type<int volatile*, int const*>::type T4;
+	BOOST_CHECK_TYPE(T4, int const volatile*);
 #endif
     typedef tt::common_type<int*, int volatile*>::type T5;
+	BOOST_CHECK_TYPE(T5, int volatile*);
 
     assignation_2<C1, C1C2>();
     assignation_2<C1C2, C2>();
diff --git a/test/common_type_test.cpp b/test/common_type_test.cpp
index 87a43e5..111cbb1 100644
--- a/test/common_type_test.cpp
+++ b/test/common_type_test.cpp
@@ -87,13 +87,18 @@ TT_TEST_BEGIN(common_type)
 {
     assignation_2<C1C2, C1>();
     typedef tt::common_type<C1C2&, C1&>::type T1;
+	BOOST_CHECK_TYPE(T1, C1C2);
     typedef tt::common_type<C3*, C2*>::type T2;
+	BOOST_CHECK_TYPE(T2, C2*);
     typedef tt::common_type<int*, int const*>::type T3;
+	BOOST_CHECK_TYPE(T3, int const*);
 #if defined(BOOST_NO_CXX11_DECLTYPE) && !defined(BOOST_COMMON_TYPE_DONT_USE_TYPEOF)
     // fails if BOOST_COMMON_TYPE_DONT_USE_TYPEOF:
     typedef tt::common_type<int volatile*, int const*>::type T4;
+	BOOST_CHECK_TYPE(T4, int const volatile*);
 #endif
     typedef tt::common_type<int*, int volatile*>::type T5;
+	BOOST_CHECK_TYPE(T5, int volatile*);
 
     assignation_2<C1, C1C2>();
     assignation_2<C1C2, C2>();