diff --git a/test/endian_arithmetic_test.cpp b/test/endian_arithmetic_test.cpp
index d127b5b..a829a3a 100644
--- a/test/endian_arithmetic_test.cpp
+++ b/test/endian_arithmetic_test.cpp
@@ -138,7 +138,8 @@ template<class T> void test( T const& x )
 
 int main()
 {
-    test( 0x01020304 );
+    test( 0xF1F2 );
+    test( 0x01020304u );
 
     return boost::report_errors();
 }