@@ -44,10 +44,10 @@
 )
 
 
-execute_kwargs = set(('istream', 'with_extended_output',
-                      'with_exceptions', 'as_process', 'stdout_as_string',
-                      'output_stream', 'with_stdout', 'kill_after_timeout',
-                      'universal_newlines', 'shell', 'env'))
+execute_kwargs = {'istream', 'with_extended_output', 'with_exceptions',
+                  'as_process', 'stdout_as_string', 'output_stream',
+                  'with_stdout', 'kill_after_timeout', 'universal_newlines',
+                  'shell', 'env'}
 
 log = logging.getLogger(__name__)
 log.addHandler(logging.NullHandler())
 
@@ -91,7 +91,7 @@ def test_it_transforms_kwargs_into_git_command_arguments(self):
 
         # order is undefined
         res = self.git.transform_kwargs(**{'s': True, 't': True})
-        self.assertEqual(set(['-s', '-t']), set(res))
+        self.assertEqual({'-s', '-t'}, set(res))
 
     def test_it_executes_git_to_shell_and_returns_result(self):
         assert_match(r'^git version [\d\.]{2}.*$', self.git.execute(["git", "version"]))
 
@@ -226,7 +226,7 @@ def test_index_file_from_tree(self, rw_repo):
     def test_index_merge_tree(self, rw_repo):
         # A bit out of place, but we need a different repo for this:
         self.assertNotEqual(self.rorepo, rw_repo)
-        self.assertEqual(len(set((self.rorepo, self.rorepo, rw_repo, rw_repo))), 2)
+        self.assertEqual(len({self.rorepo, self.rorepo, rw_repo, rw_repo}), 2)
 
         # SINGLE TREE MERGE
         # current index is at the (virtual) cur_commit
 
@@ -515,7 +515,7 @@ def test_comparison_and_hash(self):
         # this is only a preliminary test, more testing done in test_index
         self.assertEqual(self.rorepo, self.rorepo)
         self.assertFalse(self.rorepo != self.rorepo)
-        self.assertEqual(len(set((self.rorepo, self.rorepo))), 1)
+        self.assertEqual(len({self.rorepo, self.rorepo}), 1)
 
     @with_rw_directory
     def test_tilde_and_env_vars_in_repo_path(self, rw_dir):