diff --git a/hacking/checks/imports.py b/hacking/checks/imports.py
index 698eca7..610e442 100644
--- a/hacking/checks/imports.py
+++ b/hacking/checks/imports.py
@@ -72,7 +72,7 @@ def hacking_import_rules(logical_line, physical_line, filename, noqa):
         try:
             mod_name = mod
             while '.' in mod_name:
-                pack_name, _sep, mod_name = mod.partition('.')
+                pack_name, _sep, mod_name = mod_name.partition('.')
                 f, p, d = imp.find_module(pack_name, search_path)
                 search_path = [p]
             imp.find_module(mod_name, search_path)
diff --git a/hacking/tests/checks/test_imports.py b/hacking/tests/checks/test_imports.py
index 2e8e162..5a04aeb 100644
--- a/hacking/tests/checks/test_imports.py
+++ b/hacking/tests/checks/test_imports.py
@@ -15,6 +15,7 @@
 
 import mock
 import six
+import sys
 
 from hacking.checks import imports
 from hacking import tests
@@ -29,6 +30,9 @@ def fake_find_module(module, path):
         return (None, './oslo', None)
     elif module == 'db' and path[0] == './oslo':
         return (None, './oslo/db', None)
+    elif module == 'abc' and path[0] == './oslo/db':
+        # Let's fake, there is no abc.py at ./oslo/db/
+        raise ImportError
     elif './oslo/db' in path[0] and module != '_':
         return (None, '%s/%s' % (path[0], module), None)
     raise ImportError
@@ -55,3 +59,23 @@ class ImportTestCase(tests.TestCase):
         mock_import.side_effect = ImportError
         mod_name = 'oslo.db.openstack.common.gettextutils._'
         self.assertEqual('project', imports._get_import_type(mod_name))
+
+    @mock.patch.object(sys, 'path', ['.'])
+    @mock.patch(import_name)
+    @mock.patch('imp.find_module')
+    def test_module_import(self, find_module, mock_import):
+        find_module.side_effect = fake_find_module
+        # API under test
+        aut = imports.hacking_import_rules
+        for num, msg in aut('from oslo.db import xyz', None, 'fake_file.py',
+                            0):
+            # xyz should be found and this generator should be empty
+            self.fail('Module xyz should have been found under oslo.db')
+        for num, msg in aut('from oslo.db import abc', None, 'fake_file.py',
+                            0):
+            # abc should not be found and we should get H302
+            self.assertTrue(msg.startswith('H302'))
+        for num, msg in aut('from oslo.db.myz import *', None, 'fake_file.py',
+                            0):
+            # wildcard import is not allowed as per H303
+            self.assertTrue(msg.startswith('H303'))