--- test_codecvt_null.cpp.original	2003-11-01 08:41:00.000000000 +0300
+++ test_codecvt_null.cpp	2003-11-04 10:21:25.000000000 +0300
@@ -91,6 +91,20 @@
     }
 
     BOOST_TEST(ok);
+    
+    {
+	std::wofstream ofs("testfile2");
+	ofs.imbue(null_locale);
+	int i = 10;
+	ofs << i;
+	ofs.close();
+	
+	std::wifstream ifs("testfile2");
+	ifs.imbue(null_locale);
+	int i2;	
+	ifs >> i2;
+	BOOST_CHECK(i == i2);
+    }
 
     return boost::exit_success;
 }