fix python3 (?)

tests/functional/simple_test.py

@@ -8,7 +8,8 @@
 TOP = Path(__file__) / '../../..'
 SCENARIOS = TOP/'tests/scenarios'
 
-from sys import builtin_module_names
+from sys import version_info, builtin_module_names
+PY33 = (version_info >= (3, 3))
 PYPY = ('__pypy__' in builtin_module_names)
 
 
@@ -68,7 +69,11 @@ def test_arguments_version(capfd):
     assert excinfo.value.returncode == 1
     out, err = capfd.readouterr()
     lasterr = strip_coverage_warnings(err).rsplit('\n', 2)[-2]
-    assert lasterr == 'OSError: [Errno 2] No such file or directory', err
+    if PY33:
+        errname = 'FileNotFoundError'
+    else:
+        errname = 'OSError'
+    assert lasterr == errname + ': [Errno 2] No such file or directory', err
 
     lines = out.split('\n')
     assert lines[-3] == ('> virtualenv virtualenv_run --version'), out
@@ -195,8 +200,9 @@ def pipe_output(read, write):
 
     from os import fdopen
     fdopen(write, 'w').close()
-    with fdopen(read) as output:
-        result = output.read()
+    read = fdopen(read)
+    result = read.read()
+    read.close()
     vupdate.wait()
     return result