diff --git a/readme_generator/tests/test_make_readme.py b/readme_generator/tests/test_make_readme.py
index fa35278..e8b50b9 100755
--- a/readme_generator/tests/test_make_readme.py
+++ b/readme_generator/tests/test_make_readme.py
@@ -12,11 +12,16 @@ TEST_APP_NAME = "gotosocial_ynh"
 TEST_APP_REPO = "https://github.com/yunohost-apps/gotosocial_ynh"
 TEST_APP_COMMIT_ID = "8f788213b363a46a5b6faa8f844d86d4adac9446"
 
+
 def diff_files(file_a: Path, file_b: Path) -> bool:
     lines_a = file_a.open(encoding="utf-8").readlines()
     lines_b = file_b.open(encoding="utf-8").readlines()
 
-    diffs = list(difflib.unified_diff(lines_a, lines_b, fromfile='README.before.md', tofile='README.after.md'))
+    diffs = list(
+        difflib.unified_diff(
+            lines_a, lines_b, fromfile="README.before.md", tofile="README.after.md"
+        )
+    )
     print("".join(diffs))
     return len(diffs) == 0
 
@@ -27,7 +32,9 @@ def test_running_make_readme():
         DIRECTORY = tempdir / TEST_APP_NAME
 
         subprocess.check_call(["git", "clone", "-q", TEST_APP_REPO, DIRECTORY])
-        subprocess.check_call(["git", "checkout", "-q", TEST_APP_COMMIT_ID], cwd=DIRECTORY)
+        subprocess.check_call(
+            ["git", "checkout", "-q", TEST_APP_COMMIT_ID], cwd=DIRECTORY
+        )
 
         # Now run test...
         subprocess.check_call([CWD.parent / "make_readme.py", DIRECTORY])