diff --git a/news/9CD0A87D-0ACD-418E-8C02-4560A99FEB71.trivial b/news/9CD0A87D-0ACD-418E-8C02-4560A99FEB71.trivial
new file mode 100644
index 00000000000..e69de29bb2d
diff --git a/src/pip/_internal/commands/help.py b/src/pip/_internal/commands/help.py
index c17d7a457c4..82075c41565 100644
--- a/src/pip/_internal/commands/help.py
+++ b/src/pip/_internal/commands/help.py
@@ -1,11 +1,13 @@
-# The following comment should be removed at some point in the future.
-# mypy: disallow-untyped-defs=False
-
 from __future__ import absolute_import
 
 from pip._internal.cli.base_command import Command
 from pip._internal.cli.status_codes import SUCCESS
 from pip._internal.exceptions import CommandError
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from typing import List, Any
+    from optparse import Values
 
 
 class HelpCommand(Command):
@@ -16,6 +18,8 @@ class HelpCommand(Command):
     ignore_require_venv = True
 
     def run(self, options, args):
+        # type: (Values, List[Any]) -> int
+
         from pip._internal.commands import (
             commands_dict, create_command, get_similar_commands,
         )
diff --git a/src/pip/_internal/commands/list.py b/src/pip/_internal/commands/list.py
index 109ec5c664e..7b6c99936d1 100644
--- a/src/pip/_internal/commands/list.py
+++ b/src/pip/_internal/commands/list.py
@@ -1,6 +1,3 @@
-# The following comment should be removed at some point in the future.
-# mypy: disallow-untyped-defs=False
-
 from __future__ import absolute_import
 
 import json
@@ -21,6 +18,14 @@
     write_output,
 )
 from pip._internal.utils.packaging import get_installer
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from optparse import Values
+    from typing import Any, List, Set, Tuple, Dict
+
+    from pip._internal.network.session import PipSession
+    from pip._vendor.pkg_resources import Distribution
 
 logger = logging.getLogger(__name__)
 
@@ -36,7 +41,9 @@ class ListCommand(IndexGroupCommand):
       %prog [options]"""
 
     def __init__(self, *args, **kw):
-        super(ListCommand, self).__init__(*args, **kw)
+        # type: (List[Any], Dict[Any, Any]) -> None
+        # https://github.com/python/mypy/issues/4335
+        super(ListCommand, self).__init__(*args, **kw)  # type: ignore
 
         cmd_opts = self.cmd_opts
 
@@ -116,6 +123,7 @@ def __init__(self, *args, **kw):
         self.parser.insert_option_group(0, cmd_opts)
 
     def _build_package_finder(self, options, session):
+        # type: (Values, PipSession) -> PackageFinder
         """
         Create a package finder appropriate to this list command.
         """
@@ -133,6 +141,8 @@ def _build_package_finder(self, options, session):
         )
 
     def run(self, options, args):
+        # type: (Values, List[Any]) -> None
+
         if options.outdated and options.uptodate:
             raise CommandError(
                 "Options --outdated and --uptodate cannot be combined.")
@@ -162,24 +172,29 @@ def run(self, options, args):
         self.output_package_listing(packages, options)
 
     def get_outdated(self, packages, options):
+        # type: (List[Distribution], Values) -> List[Distribution]
+
         return [
             dist for dist in self.iter_packages_latest_infos(packages, options)
             if dist.latest_version > dist.parsed_version
         ]
 
     def get_uptodate(self, packages, options):
+        # type: (List[Distribution], Values) -> List[Distribution]
         return [
             dist for dist in self.iter_packages_latest_infos(packages, options)
             if dist.latest_version == dist.parsed_version
         ]
 
     def get_not_required(self, packages, options):
-        dep_keys = set()
+        # type: (List[Distribution], Values) -> List[Distribution]
+        dep_keys = set()  # type: Set[Distribution]
         for dist in packages:
             dep_keys.update(requirement.key for requirement in dist.requires())
-        return {pkg for pkg in packages if pkg.key not in dep_keys}
+        return [pkg for pkg in packages if pkg.key not in dep_keys]
 
     def iter_packages_latest_infos(self, packages, options):
+        # type: (List[Distribution], Values) -> Distribution
         with self._build_session(options) as session:
             finder = self._build_package_finder(options, session)
 
@@ -209,6 +224,7 @@ def iter_packages_latest_infos(self, packages, options):
                 yield dist
 
     def output_package_listing(self, packages, options):
+        # type: (List[Distribution], Values) -> None
         packages = sorted(
             packages,
             key=lambda dist: dist.project_name.lower(),
@@ -227,6 +243,7 @@ def output_package_listing(self, packages, options):
             write_output(format_for_json(packages, options))
 
     def output_package_listing_columns(self, data, header):
+        # type: (List[List[Any]], List[str]) -> None
         # insert the header first: we need to know the size of column names
         if len(data) > 0:
             data.insert(0, header)
@@ -242,6 +259,7 @@ def output_package_listing_columns(self, data, header):
 
 
 def format_for_columns(pkgs, options):
+    # type: (List[Distribution], Values) -> Tuple[List[List[Any]], List[str]]
     """
     Convert the package data into something usable
     by output_package_listing_columns.
@@ -279,6 +297,7 @@ def format_for_columns(pkgs, options):
 
 
 def format_for_json(packages, options):
+    # type: (List[Distribution], Values) -> str
     data = []
     for dist in packages:
         info = {
diff --git a/src/pip/_internal/commands/uninstall.py b/src/pip/_internal/commands/uninstall.py
index 5db4fb46721..b07272fc7ff 100644
--- a/src/pip/_internal/commands/uninstall.py
+++ b/src/pip/_internal/commands/uninstall.py
@@ -1,6 +1,3 @@
-# The following comment should be removed at some point in the future.
-# mypy: disallow-untyped-defs=False
-
 from __future__ import absolute_import
 
 from pip._vendor.packaging.utils import canonicalize_name
@@ -14,6 +11,11 @@
     install_req_from_parsed_requirement,
 )
 from pip._internal.utils.misc import protect_pip_from_modification_on_windows
+from pip._internal.utils.typing import MYPY_CHECK_RUNNING
+
+if MYPY_CHECK_RUNNING:
+    from optparse import Values
+    from typing import Any, List, Dict
 
 
 class UninstallCommand(Command, SessionCommandMixin):
@@ -32,7 +34,9 @@ class UninstallCommand(Command, SessionCommandMixin):
       %prog [options] -r <requirements file> ..."""
 
     def __init__(self, *args, **kw):
-        super(UninstallCommand, self).__init__(*args, **kw)
+        # type: (List[Any], Dict[Any, Any]) -> None
+        # https://github.com/python/mypy/issues/4335
+        super(UninstallCommand, self).__init__(*args, **kw)  # type: ignore
         self.cmd_opts.add_option(
             '-r', '--requirement',
             dest='requirements',
@@ -51,6 +55,8 @@ def __init__(self, *args, **kw):
         self.parser.insert_option_group(0, self.cmd_opts)
 
     def run(self, options, args):
+        # type: (Values, List[Any]) -> None
+
         session = self.get_default_session(options)
 
         reqs_to_uninstall = {}