diff -r b11b71aaf864 Lib/test/test_mmap.py
--- a/Lib/test/test_mmap.py	Sat May 21 14:56:53 2016 +0300
+++ b/Lib/test/test_mmap.py	Sun May 22 11:51:34 2016 +0200
@@ -738,7 +738,7 @@
             f.seek(num_zeroes)
             f.write(tail)
             f.flush()
-        except (OSError, OverflowError):
+        except (OSError, OverflowError, ValueError):
             try:
                 f.close()
             except (OSError, OverflowError):