diff --git a/.github/workflows/autofmt.yml b/.github/workflows/autofmt.yml
index d6d70f25..02f35052 100644
--- a/.github/workflows/autofmt.yml
+++ b/.github/workflows/autofmt.yml
@@ -16,6 +16,6 @@ jobs:
           - name: Install ruff
             run: pip install ruff==0.6.9
           - name: Check format
-            run: python -m ruff format comtypes/. --check --diff
+            run: python -m ruff format test_pip_install.py comtypes/. --check --diff
           - name: Check lint
-            run: python -m ruff check --output-format=github comtypes/.
+            run: python -m ruff check --output-format=github test_pip_install.py comtypes/.
diff --git a/test_pip_install.py b/test_pip_install.py
index 1084c69d..ebd8ed4d 100644
--- a/test_pip_install.py
+++ b/test_pip_install.py
@@ -1,11 +1,13 @@
 """This test covers 'pip install' issue #155"""
+
 import os
-import sys
 import shutil
 import subprocess
+import sys
 import tarfile
 import unittest
 
+
 def read_version():
     # Determine the version number by reading it from the file
     # 'comtypes\__init__.py'.  We cannot import this file (with py3,
@@ -13,42 +15,47 @@ def read_version():
     with open("comtypes/__init__.py") as ofi:
         for line in ofi:
             if line.startswith("__version__ = "):
-                var, value = line.split('=')
+                var, value = line.split("=")
                 return value.strip().strip('"').strip("'")
     raise NotImplementedError("__version__ is not found in __init__.py")
 
 
 class TestPipInstall(unittest.TestCase):
+    @classmethod
+    def setUpClass(cls):
+        cls.version = read_version()
 
     def setUp(self):
         """prepare the same package that is usually uploaded to PyPI"""
-        subprocess.check_call([sys.executable, '-m', 'build', '--sdist'])
+        subprocess.check_call([sys.executable, "-m", "build", "--sdist"])
 
-        filename_for_upload = 'comtypes-%s.tar.gz' % read_version()
-        self.target_package = os.path.join(os.getcwd(), 'dist', filename_for_upload)
-        self.pip_exe = os.path.join(os.path.dirname(sys.executable), 'Scripts', 'pip.exe')
+        filename_for_upload = f"comtypes-{self.version}.tar.gz"
+        self.target_package = os.path.join(os.getcwd(), "dist", filename_for_upload)
+        self.pip_exe = os.path.join(
+            os.path.dirname(sys.executable), "Scripts", "pip.exe"
+        )
 
     def test_pip_install(self):
         """Test that "pip install comtypes-x.y.z.tar.gz" works"""
-        subprocess.check_call([self.pip_exe, 'install', self.target_package])
+        subprocess.check_call([self.pip_exe, "install", self.target_package])
 
     def test_py_typed_is_packaged(self):
         with tarfile.open(self.target_package, "r:gz") as tar:
-            self.assertIn(
-                f"comtypes-{read_version()}/comtypes/py.typed", tar.getnames()
-            )
+            self.assertIn(f"comtypes-{self.version}/comtypes/py.typed", tar.getnames())
 
     def test_no_cache_dir_custom_location(self):
         """Test that 'pip install comtypes-x.y.z.tar.gz --no-cache-dir --target="...\custom location"' works"""
-        custom_dir = os.path.join(os.getcwd(), 'custom location')
+        custom_dir = os.path.join(os.getcwd(), "custom location")
         if os.path.exists(custom_dir):
             shutil.rmtree(custom_dir)
         os.makedirs(custom_dir)
 
         # this test catches issue #158
-        subprocess.check_call('{0} install {1} --no-cache-dir --target="{2}"' \
-            ''.format(self.pip_exe, self.target_package, custom_dir))
+        subprocess.check_call(
+            f"{self.pip_exe} install {self.target_package} "
+            f'--no-cache-dir --target="{custom_dir}"'
+        )
 
 
-if __name__ == '__main__':
+if __name__ == "__main__":
     unittest.main()