diff -r 811ccdee6f87 Lib/test/test_io.py
--- a/Lib/test/test_io.py	Wed May 04 09:44:44 2016 +0300
+++ b/Lib/test/test_io.py	Wed May 04 21:07:28 2016 +0200
@@ -264,6 +264,29 @@
     BlockingIOError = pyio.BlockingIOError
 
 
+def _setrlimit_largefile_failure(size):
+    # True when failing to set the maximum size of a file which a process may
+    # create, to the size of a large file.
+    try:
+        import resource
+    except ImportError:
+        pass
+    if hasattr(resource, 'RLIMIT_FSIZE'):
+        code = """if 1:
+            import resource
+
+            soft, hard = resource.getrlimit(resource.RLIMIT_FSIZE)
+            resource.setrlimit(resource.RLIMIT_FSIZE, (%d, hard))
+            print(resource.getrlimit(resource.RLIMIT_FSIZE)[0])
+            """
+        (rc, out, err), _ = run_python_until_end("-c", code % size)
+        try:
+            rlimit = int(out.strip())
+        except ValueError:
+            return True
+        else:
+            return rc != 0 or rlimit != size
+
 class IOTest(unittest.TestCase):
 
     def setUp(self):
@@ -525,6 +548,8 @@
         f = self.BytesIO(data)
         self.read_ops(f, True)
 
+    @unittest.skipIf(_setrlimit_largefile_failure(LARGE + 3),
+                         'large file is not supported')
     def test_large_file_ops(self):
         # On Windows and Mac OSX this test comsumes large resources; It takes
         # a long time to build the >2GB file and takes >2GB of disk space