diff --git a/Lib/test/test_tarfile.py b/Lib/test/test_tarfile.py
index 7a0d677..c73b7b2 100644
--- a/Lib/test/test_tarfile.py
+++ b/Lib/test/test_tarfile.py
@@ -350,7 +350,7 @@
                         return "{} ({})".format(mtime, mtime.hex())
                     else:
                         return "{!r} (int)".format(mtime)
-                file_mtime = os.path.getmtime(path) + 0.001
+                file_mtime = os.path.getmtime(path)
                 errmsg = "tar mtime {0} != file time {1} of path {2!a}".format(
                     format_mtime(tarinfo.mtime),
                     format_mtime(file_mtime),