diff --git a/jedi/evaluate/imports.py b/jedi/evaluate/imports.py
index ec3ff0ca..8a0da9c4 100644
--- a/jedi/evaluate/imports.py
+++ b/jedi/evaluate/imports.py
@@ -528,7 +528,7 @@ class _Importer(object):
             options = ('declare_namespace(__name__)', 'extend_path(__path__')
             if options[0] in content or options[1] in content:
                 # It is a namespace, now try to find the rest of the modules.
-                return follow_path(iter(import_path), sys.path)
+                return follow_path((str(i) for i in import_path), sys.path)
         return []
 
     def _follow_sys_path(self, sys_path):
@@ -647,7 +647,6 @@ class _Importer(object):
                         if os.path.isdir(flaskext):
                             names += self._get_module_names([flaskext])
 
-                # TODO delete
                 # namespace packages
                 if isinstance(scope, pr.Module) and scope.path.endswith('__init__.py'):
                     pkg_path = os.path.dirname(scope.path)
@@ -661,8 +660,10 @@ class _Importer(object):
                         # os.path is a hardcoded exception, because it's a
                         # ``sys.modules`` modification.
                         names.append(self._generate_name('path'))
+
                     continue
 
+                # TODO delete
                 if False and not self.import_stmt.from_names or False and self.is_partial_import:
                         # from_names must be defined to access module
                         # values plus a partial import means that there
diff --git a/pytest.ini b/pytest.ini
index 9626144c..1168b452 100644
--- a/pytest.ini
+++ b/pytest.ini
@@ -2,7 +2,7 @@
 addopts = --doctest-modules
 
 # Ignore broken files in blackbox test directories
-norecursedirs = .* docs completion refactor absolute_import namespace_package scripts extensions speed static_analysis
+norecursedirs = .* docs completion refactor absolute_import namespace_package scripts extensions speed static_analysis not_in_sys_path buildout_project
 
 # Activate `clean_jedi_cache` fixture for all tests.  This should be
 # fine as long as we are using `clean_jedi_cache` as a session scoped
diff --git a/test/test_evaluate/test_imports.py b/test/test_evaluate/test_imports.py
index e695df79..6c4d293c 100644
--- a/test/test_evaluate/test_imports.py
+++ b/test/test_evaluate/test_imports.py
@@ -39,10 +39,10 @@ def teardown_function(function):
 
 
 @pytest.mark.parametrize("script,name", [
-    ("from flask.ext import foo; foo.", "Foo"), # flask_foo.py
-    ("from flask.ext import bar; bar.", "Bar"), # flaskext/bar.py
-    ("from flask.ext import baz; baz.", "Baz"), # flask_baz/__init__.py
-    ("from flask.ext import moo; moo.", "Moo"), # flaskext/moo/__init__.py
+    ("from flask.ext import foo; foo.", "Foo"),  # flask_foo.py
+    ("from flask.ext import bar; bar.", "Bar"),  # flaskext/bar.py
+    ("from flask.ext import baz; baz.", "Baz"),  # flask_baz/__init__.py
+    ("from flask.ext import moo; moo.", "Moo"),  # flaskext/moo/__init__.py
     ("from flask.ext.", "foo"),
     ("from flask.ext.", "bar"),
     ("from flask.ext.", "baz"),
@@ -56,4 +56,3 @@ def test_flask_ext(script, name):
     """flask.ext.foo is really imported from flaskext.foo or flask_foo.
     """
     assert name in [c.name for c in jedi.Script(script).completions()]
-
diff --git a/test/test_evaluate/test_namespace_package.py b/test/test_evaluate/test_namespace_package.py
index f39f58ef..c9e6cb97 100644
--- a/test/test_evaluate/test_namespace_package.py
+++ b/test/test_evaluate/test_namespace_package.py
@@ -31,7 +31,7 @@ def test_namespace_package():
         names = [str(c.name) for c in completions]  # str because of unicode
         compare = ['foo', 'ns1_file', 'ns1_folder', 'ns2_folder', 'ns2_file']
         # must at least contain these items, other items are not important
-        assert not (set(compare) - set(names))
+        assert set(compare) == set(names)
 
         tests = {
             'from pkg import ns2_folder as x': 'ns2_folder!',