diff --git a/test/iterator_pair.cpp b/test/iterator_pair.cpp
index d50a1f7..2546817 100755
--- a/test/iterator_pair.cpp
+++ b/test/iterator_pair.cpp
@@ -65,17 +65,17 @@ void check_iterator_pair()
     BOOST_CHECK( begin( pair ) == pair.first );
     BOOST_CHECK( end( pair )   == pair.second );
     BOOST_CHECK( empty( pair ) == (pair.first == pair.second) );
-    BOOST_CHECK( size( pair )  == std::size_t( std::distance( pair.first, pair.second ) ) );
+    BOOST_CHECK( size( pair )  == std::distance( pair.first, pair.second ) );
     
     BOOST_CHECK( begin( const_pair ) == const_pair.first );
     BOOST_CHECK( end( const_pair )   == const_pair.second );
     BOOST_CHECK( empty( const_pair ) == (const_pair.first == const_pair.second) );
-    BOOST_CHECK( size( const_pair )  == std::size_t( std::distance( const_pair.first, const_pair.second ) ) );
+    BOOST_CHECK( size( const_pair )  == std::distance( const_pair.first, const_pair.second ) );
 
     BOOST_CHECK( begin( constness_pair ) == constness_pair.first );
     BOOST_CHECK( end( constness_pair )   == constness_pair.second );
     BOOST_CHECK( empty( constness_pair ) == (constness_pair.first == const_pair.second) );
-    BOOST_CHECK( size( constness_pair )  == std::size_t( std::distance( constness_pair.first, constness_pair.second ) ) );
+    BOOST_CHECK( size( constness_pair )  == std::distance( constness_pair.first, constness_pair.second ) );
 
 }
 
diff --git a/test/std_container.cpp b/test/std_container.cpp
index e26d2a3..e2ee692 100755
--- a/test/std_container.cpp
+++ b/test/std_container.cpp
@@ -48,12 +48,12 @@ void check_std_container()
     BOOST_CHECK( begin( vec ) == vec.begin() );
     BOOST_CHECK( end( vec )   == vec.end() );
     BOOST_CHECK( empty( vec ) == vec.empty() );
-    BOOST_CHECK( size( vec ) == vec.size() );
+    BOOST_CHECK( (std::size_t)size( vec ) == vec.size() );
     
     BOOST_CHECK( begin( cvec ) == cvec.begin() );
     BOOST_CHECK( end( cvec )   == cvec.end() );
     BOOST_CHECK( empty( cvec ) == cvec.empty() );
-    BOOST_CHECK( size( cvec ) == cvec.size() );
+    BOOST_CHECK( (std::size_t)size( cvec ) == cvec.size() );
 
 }