3 files changed, 24 insertions, 4 deletions
diff --git a/Lib/test/test_importlib/fixtures.py b/Lib/test/test_importlib/fixtures.py
index 3b926ba..0b4ce18 100644
--- a/Lib/test/test_importlib/fixtures.py
+++ b/Lib/test/test_importlib/fixtures.py
@@ -83,6 +83,7 @@ class DistInfoPkg(OnSysPath, SiteDir):
             "entry_points.txt": """
                 [entries]
                 main = mod:main
+                ns:sub = mod:main
             """
             },
         "mod.py": """
diff --git a/Lib/test/test_importlib/test_main.py b/Lib/test/test_importlib/test_main.py
index 5e2cb26..bc42b83 100644
--- a/Lib/test/test_importlib/test_main.py
+++ b/Lib/test/test_importlib/test_main.py
@@ -32,7 +32,7 @@ class BasicTests(fixtures.DistInfoPkg, unittest.TestCase):
 class ImportTests(fixtures.DistInfoPkg, unittest.TestCase):
     def test_import_nonexistent_module(self):
         # Ensure that the MetadataPathFinder does not crash an import of a
-        # nonexistent module.
+        # non-existant module.
         with self.assertRaises(ImportError):
             importlib.import_module('does_not_exist')
 
@@ -41,6 +41,11 @@ class ImportTests(fixtures.DistInfoPkg, unittest.TestCase):
         ep = entries['main']
         self.assertEqual(ep.load().__name__, "main")
 
+    def test_entrypoint_with_colon_in_name(self):
+        entries = dict(entry_points()['entries'])
+        ep = entries['ns:sub']
+        self.assertEqual(ep.value, 'mod:main')
+
     def test_resolve_without_attr(self):
         ep = EntryPoint(
             name='ep',
@@ -159,8 +164,16 @@ class DiscoveryTests(fixtures.EggInfoPkg,
 
 
 class DirectoryTest(fixtures.OnSysPath, fixtures.SiteDir, unittest.TestCase):
-    def test(self):
+    def test_egg_info(self):
         # make an `EGG-INFO` directory that's unrelated
         self.site_dir.joinpath('EGG-INFO').mkdir()
         # used to crash with `IsADirectoryError`
-        self.assertIsNone(version('unknown-package'))
+        with self.assertRaises(PackageNotFoundError):
+            version('unknown-package')
+
+    def test_egg(self):
+        egg = self.site_dir.joinpath('foo-3.6.egg')
+        egg.mkdir()
+        with self.add_sys_path(egg):
+            with self.assertRaises(PackageNotFoundError):
+                version('foo')
diff --git a/Lib/test/test_importlib/test_zip.py b/Lib/test/test_importlib/test_zip.py
index bcf7cf3..9568c22 100644
--- a/Lib/test/test_importlib/test_zip.py
+++ b/Lib/test/test_importlib/test_zip.py
@@ -2,7 +2,9 @@ import sys
 import unittest
 
 from contextlib import ExitStack
-from importlib.metadata import distribution, entry_points, files, version
+from importlib.metadata import (
+    distribution, entry_points, files, PackageNotFoundError, version,
+)
 from importlib.resources import path
 
 
@@ -22,6 +24,10 @@ class TestZip(unittest.TestCase):
     def test_zip_version(self):
         self.assertEqual(version('example'), '21.12')
 
+    def test_zip_version_does_not_match(self):
+        with self.assertRaises(PackageNotFoundError):
+            version('definitely-not-installed')
+
     def test_zip_entry_points(self):
         scripts = dict(entry_points()['console_scripts'])
         entry_point = scripts['example']