diff --git a/Lib/shutil.py b/Lib/shutil.py
index 1c3a75da55ba5b..d108986d130267 100644
--- a/Lib/shutil.py
+++ b/Lib/shutil.py
@@ -454,7 +454,7 @@ def _copytree(entries, src, dst, symlinks, ignore, copy_function,
     if ignore is not None:
         ignored_names = ignore(os.fspath(src), [x.name for x in entries])
     else:
-        ignored_names = set()
+        ignored_names = ()
 
     os.makedirs(dst, exist_ok=dirs_exist_ok)
     errors = []
diff --git a/Lib/test/test_support.py b/Lib/test/test_support.py
index 2efdbd22d90e2e..01ba88ce42c5f6 100644
--- a/Lib/test/test_support.py
+++ b/Lib/test/test_support.py
@@ -818,7 +818,7 @@ def test_copy_python_src_ignore(self):
         self.assertEqual(support.copy_python_src_ignore(path, os.listdir(path)),
                          ignored | {'build', 'venv'})
 
-        # An other directory
+        # Another directory
         path = os.path.join(src_dir, 'Objects')
         self.assertEqual(support.copy_python_src_ignore(path, os.listdir(path)),
                          ignored)
diff --git a/Lib/test/test_venv.py b/Lib/test/test_venv.py
index 884ac3ac567c07..eb9227a3b70379 100644
--- a/Lib/test/test_venv.py
+++ b/Lib/test/test_venv.py
@@ -572,7 +572,11 @@ def test_zippath_from_non_installed_posix(self):
                         eachpath,
                         os.path.join(non_installed_dir, platlibdir))
             elif os.path.isfile(os.path.join(eachpath, "os.py")):
-                for name in os.listdir(eachpath):
+                names = os.listdir(eachpath)
+                ignored_names = copy_python_src_ignore(eachpath, names)
+                for name in names:
+                    if name in ignored_names:
+                        continue
                     if name == "site-packages":
                         continue
                     fn = os.path.join(eachpath, name)