Use ValueError, not RuntimeError for a utime flag combination illegal on some systems.
diff --git a/Lib/test/test_posix.py b/Lib/test/test_posix.py
index 776439f..9bedc7d 100644
--- a/Lib/test/test_posix.py
+++ b/Lib/test/test_posix.py
@@ -730,7 +730,7 @@
             if os.utime in os.supports_follow_symlinks:
                 try:
                     posix.utime(support.TESTFN, follow_symlinks=False, dir_fd=f)
-                except RuntimeError:
+                except ValueError:
                     # whoops!  using both together not supported on this platform.
                     pass