diff --git a/Lib/test/test_file.py b/Lib/test/test_file.py
index 2869ce76c6d..0803490add6 100644
--- a/Lib/test/test_file.py
+++ b/Lib/test/test_file.py
@@ -101,7 +101,7 @@ class NonString: pass
 f.close()
 
 try:
-    sys.stdin.seek(0)
+    sys.stdin.seek(-1)
 except IOError:
     pass
 else: