diff --git a/powerline/segments/common/env.py b/powerline/segments/common/env.py
index 8041e500..1aa991af 100644
--- a/powerline/segments/common/env.py
+++ b/powerline/segments/common/env.py
@@ -122,15 +122,20 @@ try:
 
 	# psutil-2.0.0: psutil.Process.username is unbound method
 	if callable(psutil.Process.username):
-		def _get_user(segment_info):
+		def _get_user():
 			return psutil.Process(os.getpid()).username()
 	# pre psutil-2.0.0: psutil.Process.username has type property
 	else:
-		def _get_user(segment_info):
+		def _get_user():
 			return psutil.Process(os.getpid()).username
 except ImportError:
-	def _get_user(segment_info):
-		return segment_info['environ'].get('USER', None)
+	try:
+		import pwd
+	except ImportError:
+		from getpass import getuser as _get_user
+	else:
+		def _get_user():
+			return pwd.getpwuid(os.geteuid()).pw_name
 
 
 username = False
@@ -138,7 +143,7 @@ username = False
 _geteuid = getattr(os, 'geteuid', lambda: 1)
 
 
-def user(pl, segment_info=None, hide_user=None):
+def user(pl, hide_user=None):
 	'''Return the current user.
 
 	:param str hide_user:
@@ -150,7 +155,7 @@ def user(pl, segment_info=None, hide_user=None):
 	'''
 	global username
 	if username is False:
-		username = _get_user(segment_info)
+		username = _get_user()
 	if username is None:
 		pl.warn('Failed to get username')
 		return None
diff --git a/tests/test_segments.py b/tests/test_segments.py
index 3ee3011b..57f23abb 100644
--- a/tests/test_segments.py
+++ b/tests/test_segments.py
@@ -5,6 +5,7 @@ import sys
 import os
 
 from functools import partial
+from collections import namedtuple
 
 from powerline.segments import shell, tmux, common
 from powerline.lib.vcs import get_fallback_create_watcher
@@ -451,24 +452,27 @@ class TestEnv(TestCommon):
 			if hasattr(self.module, 'psutil') and not callable(self.module.psutil.Process.username):
 				username = property(username)
 
+		struct_passwd = namedtuple('struct_passwd', ('pw_name',))
 		new_psutil = new_module('psutil', Process=Process)
+		new_pwd = new_module('pwd', getpwuid=lambda uid: struct_passwd(pw_name='def'))
+		new_getpass = new_module('getpass', getuser=lambda: 'def')
 		pl = Pl()
-		with replace_env('USER', 'def') as segment_info:
-			common.username = False
-			with replace_attr(self.module, 'os', new_os):
-				with replace_attr(self.module, 'psutil', new_psutil):
-					with replace_attr(self.module, '_geteuid', lambda: 5):
-						self.assertEqual(common.user(pl=pl, segment_info=segment_info), [
-							{'contents': 'def', 'highlight_group': ['user']}
-						])
-						self.assertEqual(common.user(pl=pl, segment_info=segment_info, hide_user='abc'), [
-							{'contents': 'def', 'highlight_group': ['user']}
-						])
-						self.assertEqual(common.user(pl=pl, segment_info=segment_info, hide_user='def'), None)
-					with replace_attr(self.module, '_geteuid', lambda: 0):
-						self.assertEqual(common.user(pl=pl, segment_info=segment_info), [
-							{'contents': 'def', 'highlight_group': ['superuser', 'user']}
-						])
+		with replace_attr(self.module, 'pwd', new_pwd):
+			with replace_attr(self.module, 'getpass', new_getpass):
+				with replace_attr(self.module, 'os', new_os):
+					with replace_attr(self.module, 'psutil', new_psutil):
+						with replace_attr(self.module, '_geteuid', lambda: 5):
+							self.assertEqual(common.user(pl=pl), [
+								{'contents': 'def', 'highlight_group': ['user']}
+							])
+							self.assertEqual(common.user(pl=pl, hide_user='abc'), [
+								{'contents': 'def', 'highlight_group': ['user']}
+							])
+							self.assertEqual(common.user(pl=pl, hide_user='def'), None)
+						with replace_attr(self.module, '_geteuid', lambda: 0):
+							self.assertEqual(common.user(pl=pl), [
+								{'contents': 'def', 'highlight_group': ['superuser', 'user']}
+							])
 
 	def test_cwd(self):
 		new_os = new_module('os', path=os.path, sep='/')