diff --git a/Lib/packaging/tests/test_manifest.py b/Lib/packaging/tests/test_manifest.py
--- a/Lib/packaging/tests/test_manifest.py
+++ b/Lib/packaging/tests/test_manifest.py
@@ -1,8 +1,10 @@
 """Tests for packaging.manifest."""
 import os
+import re
 import logging
 from io import StringIO
-from packaging.manifest import Manifest
+from packaging.errors import PackagingTemplateError
+from packaging.manifest import Manifest, _translate_pattern, _glob_to_re
 
 from packaging.tests import unittest, support
 
@@ -34,6 +36,14 @@ class ManifestTestCase(support.TempdirMa
         os.chdir(self.cwd)
         super(ManifestTestCase, self).tearDown()
 
+    def assertNoWarnings(self):
+        self.assertEqual(len(self.get_logs(WARN)), 0)
+        self.clear_logs()
+
+    def assertWarnings(self):
+        self.assertGreater(len(self.get_logs(WARN)), 0)
+        self.clear_logs()
+
     def test_manifest_reader(self):
         tmpdir = self.mkdtemp()
         MANIFEST = os.path.join(tmpdir, 'MANIFEST.in')
@@ -69,6 +79,188 @@ class ManifestTestCase(support.TempdirMa
         manifest.read_template(content)
         self.assertEqual(['README', 'file1'], manifest.files)
 
+    def test_glob_to_re(self):
+        # simple cases
+        self.assertEqual(_glob_to_re('foo*'), 'foo[^/]*\\Z(?ms)')
+        self.assertEqual(_glob_to_re('foo?'), 'foo[^/]\\Z(?ms)')
+        self.assertEqual(_glob_to_re('foo??'), 'foo[^/][^/]\\Z(?ms)')
+
+        # special cases
+        self.assertEqual(_glob_to_re(r'foo\\*'), r'foo\\\\[^/]*\Z(?ms)')
+        self.assertEqual(_glob_to_re(r'foo\\\*'), r'foo\\\\\\[^/]*\Z(?ms)')
+        self.assertEqual(_glob_to_re('foo????'), r'foo[^/][^/][^/][^/]\Z(?ms)')
+        self.assertEqual(_glob_to_re(r'foo\\??'), r'foo\\\\[^/][^/]\Z(?ms)')
+
+    def test_remove_duplicates(self):
+        manifest = Manifest()
+        manifest.files = ['a', 'b', 'a', 'g', 'c', 'g']
+        # files must be sorted beforehand
+        manifest.sort()
+        manifest.remove_duplicates()
+        self.assertEqual(manifest.files, ['a', 'b', 'c', 'g'])
+
+    def test_translate_pattern(self):
+        # blackbox test of a private function
+
+        # not regex
+        self.assertTrue(hasattr(
+            _translate_pattern('a', anchor=True, is_regex=False),
+            'search'))
+
+        # is a regex
+        regex = re.compile('a')
+        self.assertEqual(
+            _translate_pattern(regex, anchor=True, is_regex=True),
+            regex)
+
+        # plain string flagged as regex
+        self.assertTrue(hasattr(
+            _translate_pattern('a', anchor=True, is_regex=True),
+            'search'))
+
+        # glob support
+        self.assertTrue(_translate_pattern(
+            '*.py', anchor=True, is_regex=False).search('filelist.py'))
+
+    def test_exclude_pattern(self):
+        # return False if no match
+        manifest = Manifest()
+        self.assertFalse(manifest.exclude_pattern('*.py'))
+
+        # return True if files match
+        manifest = Manifest()
+        manifest.files = ['a.py', 'b.py']
+        self.assertTrue(manifest.exclude_pattern('*.py'))
+
+        # test excludes
+        manifest = Manifest()
+        manifest.files = ['a.py', 'a.txt']
+        manifest.exclude_pattern('*.py')
+        self.assertEqual(manifest.files, ['a.txt'])
+
+    def test_include_pattern(self):
+        # return False if no match
+        manifest = Manifest()
+        manifest.allfiles = []
+        self.assertFalse(manifest._include_pattern('*.py'))
+
+        # return True if files match
+        manifest = Manifest()
+        manifest.allfiles = ['a.py', 'b.txt']
+        self.assertTrue(manifest._include_pattern('*.py'))
+
+        # test * matches all files
+        manifest = Manifest()
+        self.assertIsNone(manifest.allfiles)
+        manifest._include_pattern('*')
+        self.assertIsNotNone(manifest.allfiles)
+
+    def test_process_template(self):
+        # invalid lines
+        manifest = Manifest()
+        for action in ('include', 'exclude', 'global-include',
+                       'global-exclude', 'recursive-include',
+                       'recursive-exclude', 'graft', 'prune', 'blarg'):
+            self.assertRaises(PackagingTemplateError,
+                              manifest._process_template_line,
+                              action)
+
+        # include
+        manifest = Manifest()
+        manifest.set_allfiles(['a.py', 'b.txt', 'd/c.py'])
+
+        manifest._process_template_line('include *.py')
+        self.assertEqual(manifest.files, ['a.py'])
+        self.assertNoWarnings()
+
+        manifest._process_template_line('include *.rb')
+        self.assertEqual(manifest.files, ['a.py'])
+        self.assertWarnings()
+
+        # exclude
+        manifest = Manifest()
+        manifest.files = ['a.py', 'b.txt', 'd/c.py']
+
+        manifest._process_template_line('exclude *.py')
+        self.assertEqual(manifest.files, ['b.txt', 'd/c.py'])
+        self.assertNoWarnings()
+
+        manifest._process_template_line('exclude *.rb')
+        self.assertEqual(manifest.files, ['b.txt', 'd/c.py'])
+        self.assertWarnings()
+
+        # global-include
+        manifest = Manifest()
+        manifest.set_allfiles(['a.py', 'b.txt', 'd/c.py'])
+
+        manifest._process_template_line('global-include *.py')
+        self.assertEqual(manifest.files, ['a.py', 'd/c.py'])
+        self.assertNoWarnings()
+
+        manifest._process_template_line('global-include *.rb')
+        self.assertEqual(manifest.files, ['a.py', 'd/c.py'])
+        self.assertWarnings()
+
+        # global-exclude
+        manifest = Manifest()
+        manifest.files = ['a.py', 'b.txt', 'd/c.py']
+
+        manifest._process_template_line('global-exclude *.py')
+        self.assertEqual(manifest.files, ['b.txt'])
+        self.assertNoWarnings()
+
+        manifest._process_template_line('global-exclude *.rb')
+        self.assertEqual(manifest.files, ['b.txt'])
+        self.assertWarnings()
+
+        # recursive-include
+        manifest = Manifest()
+        manifest.set_allfiles(['a.py', 'd/b.py', 'd/c.txt', 'd/d/e.py'])
+
+        manifest._process_template_line('recursive-include d *.py')
+        self.assertEqual(manifest.files, ['d/b.py', 'd/d/e.py'])
+        self.assertNoWarnings()
+
+        manifest._process_template_line('recursive-include e *.py')
+        self.assertEqual(manifest.files, ['d/b.py', 'd/d/e.py'])
+        self.assertWarnings()
+
+        # recursive-exclude
+        manifest = Manifest()
+        manifest.files = ['a.py', 'd/b.py', 'd/c.txt', 'd/d/e.py']
+
+        manifest._process_template_line('recursive-exclude d *.py')
+        self.assertEqual(manifest.files, ['a.py', 'd/c.txt'])
+        self.assertNoWarnings()
+
+        manifest._process_template_line('recursive-exclude e *.py')
+        self.assertEqual(manifest.files, ['a.py', 'd/c.txt'])
+        self.assertWarnings()
+
+        # graft
+        manifest = Manifest()
+        manifest.set_allfiles(['a.py', 'd/b.py', 'd/d/e.py', 'f/f.py'])
+
+        manifest._process_template_line('graft d')
+        self.assertEqual(manifest.files, ['d/b.py', 'd/d/e.py'])
+        self.assertNoWarnings()
+
+        manifest._process_template_line('graft e')
+        self.assertEqual(manifest.files, ['d/b.py', 'd/d/e.py'])
+        self.assertWarnings()
+
+        # prune
+        manifest = Manifest()
+        manifest.files = ['a.py', 'd/b.py', 'd/d/e.py', 'f/f.py']
+
+        manifest._process_template_line('prune d')
+        self.assertEqual(manifest.files, ['a.py', 'f/f.py'])
+        self.assertNoWarnings()
+
+        manifest._process_template_line('prune e')
+        self.assertEqual(manifest.files, ['a.py', 'f/f.py'])
+        self.assertWarnings()
+
 
 def test_suite():
     return unittest.makeSuite(ManifestTestCase)