1 files changed, 41 insertions, 34 deletions
diff --git a/tests/functional/test_debug.py b/tests/functional/test_debug.py
index 0e2261e1a..41374f8cb 100644
--- a/tests/functional/test_debug.py
+++ b/tests/functional/test_debug.py
@@ -1,86 +1,93 @@
+from typing import List
+
 import pytest
 
 from pip._internal.commands.debug import create_vendor_txt_map
 from pip._internal.utils import compatibility_tags
+from tests.lib import PipTestEnvironment
 
 
-@pytest.mark.parametrize('expected_text', [
-    'sys.executable: ',
-    'sys.getdefaultencoding: ',
-    'sys.getfilesystemencoding: ',
-    'locale.getpreferredencoding: ',
-    'sys.platform: ',
-    'sys.implementation:',
-    '\'cert\' config value: ',
-    'REQUESTS_CA_BUNDLE: ',
-    'CURL_CA_BUNDLE: ',
-    'pip._vendor.certifi.where(): ',
-    'pip._vendor.DEBUNDLED: ',
-    'vendored library versions:',
-
-])
-def test_debug(script, expected_text):
+@pytest.mark.parametrize(
+    "expected_text",
+    [
+        "sys.executable: ",
+        "sys.getdefaultencoding: ",
+        "sys.getfilesystemencoding: ",
+        "locale.getpreferredencoding: ",
+        "sys.platform: ",
+        "sys.implementation:",
+        "'cert' config value: ",
+        "REQUESTS_CA_BUNDLE: ",
+        "CURL_CA_BUNDLE: ",
+        "pip._vendor.certifi.where(): ",
+        "pip._vendor.DEBUNDLED: ",
+        "vendored library versions:",
+    ],
+)
+def test_debug(script: PipTestEnvironment, expected_text: str) -> None:
     """
     Check that certain strings are present in the output.
     """
-    args = ['debug']
+    args = ["debug"]
     result = script.pip(*args, allow_stderr_warning=True)
     stdout = result.stdout
 
     assert expected_text in stdout
 
 
-def test_debug__library_versions(script):
+def test_debug__library_versions(script: PipTestEnvironment) -> None:
     """
     Check the library versions normal output.
     """
-    args = ['debug']
+    args = ["debug"]
     result = script.pip(*args, allow_stderr_warning=True)
     print(result.stdout)
 
     vendored_versions = create_vendor_txt_map()
     for name, value in vendored_versions.items():
-        assert f'{name}=={value}' in result.stdout
+        assert f"{name}=={value}" in result.stdout
 
 
 @pytest.mark.parametrize(
-    'args',
+    "args",
     [
         [],
-        ['--verbose'],
-    ]
+        ["--verbose"],
+    ],
 )
-def test_debug__tags(script, args):
+def test_debug__tags(script: PipTestEnvironment, args: List[str]) -> None:
     """
     Check the compatible tag output.
     """
-    args = ['debug'] + args
+    args = ["debug"] + args
     result = script.pip(*args, allow_stderr_warning=True)
     stdout = result.stdout
 
     tags = compatibility_tags.get_supported()
-    expected_tag_header = 'Compatible tags: {}'.format(len(tags))
+    expected_tag_header = "Compatible tags: {}".format(len(tags))
     assert expected_tag_header in stdout
 
-    show_verbose_note = '--verbose' not in args
+    show_verbose_note = "--verbose" not in args
     assert (
-        '...\n  [First 10 tags shown. Pass --verbose to show all.]' in stdout
+        "...\n  [First 10 tags shown. Pass --verbose to show all.]" in stdout
     ) == show_verbose_note
 
 
 @pytest.mark.parametrize(
-    'args, expected',
+    "args, expected",
     [
-        (['--python-version', '3.7'], "(target: version_info='3.7')"),
-    ]
+        (["--python-version", "3.7"], "(target: version_info='3.7')"),
+    ],
 )
-def test_debug__target_options(script, args, expected):
+def test_debug__target_options(
+    script: PipTestEnvironment, args: List[str], expected: str
+) -> None:
     """
     Check passing target-related options.
     """
-    args = ['debug'] + args
+    args = ["debug"] + args
     result = script.pip(*args, allow_stderr_warning=True)
     stdout = result.stdout
 
-    assert 'Compatible tags: ' in stdout
+    assert "Compatible tags: " in stdout
     assert expected in stdout