-#ifndef REGTEST
- TESTCASE( rename( filename1 + 6, filename2 ) == -1 );
-#else
- /* glibc rename() overwrites existing destination file. */
- TESTCASE( rename( filename1 + 6, filename2 ) == 0 );
-#endif
+ /* NOREG as glibc overwrites existing destination file. */
+ TESTCASE_NOREG( rename( testfile1, testfile2 ) != 0 );