diff --git a/data/hooks/diagnosis/80-apps.py b/data/hooks/diagnosis/80-apps.py
index 4ab5a6c0d..177ec590f 100644
--- a/data/hooks/diagnosis/80-apps.py
+++ b/data/hooks/diagnosis/80-apps.py
@@ -6,6 +6,7 @@ from yunohost.app import app_list
 
 from yunohost.diagnosis import Diagnoser
 
+
 class AppDiagnoser(Diagnoser):
 
     id_ = os.path.splitext(os.path.basename(__file__))[0].split("-")[1]
@@ -30,13 +31,17 @@ class AppDiagnoser(Diagnoser):
                 if not app["issues"]:
                     continue
 
-                level = "ERROR" if any(issue[0] == "error" for issue in app["issues"]) else "WARNING"
+                level = (
+                    "ERROR"
+                    if any(issue[0] == "error" for issue in app["issues"])
+                    else "WARNING"
+                )
 
                 yield dict(
                     meta={"test": "apps", "app": app["name"]},
                     status=level,
                     summary="diagnosis_apps_issue",
-                    details=[issue[1] for issue in app["issues"]]
+                    details=[issue[1] for issue in app["issues"]],
                 )
 
     def issues(self, app):
@@ -45,14 +50,19 @@ class AppDiagnoser(Diagnoser):
 
         if not app.get("from_catalog") or app["from_catalog"].get("state") != "working":
             yield ("error", "diagnosis_apps_not_in_app_catalog")
-        elif not isinstance(app["from_catalog"].get("level"), int) or app["from_catalog"]["level"] == 0:
+        elif (
+            not isinstance(app["from_catalog"].get("level"), int)
+            or app["from_catalog"]["level"] == 0
+        ):
             yield ("error", "diagnosis_apps_broken")
         elif app["from_catalog"]["level"] <= 4:
             yield ("warning", "diagnosis_apps_bad_quality")
 
         # Check for super old, deprecated practices
 
-        yunohost_version_req = app["manifest"].get("requirements", {}).get("yunohost", "").strip(">= ")
+        yunohost_version_req = (
+            app["manifest"].get("requirements", {}).get("yunohost", "").strip(">= ")
+        )
         if yunohost_version_req.startswith("2."):
             yield ("error", "diagnosis_apps_outdated_ynh_requirement")
 
@@ -64,11 +74,21 @@ class AppDiagnoser(Diagnoser):
             "yunohost tools port-available",
         ]
         for deprecated_helper in deprecated_helpers:
-            if os.system(f"grep -nr -q '{deprecated_helper}' {app['setting_path']}/scripts/") == 0:
+            if (
+                os.system(
+                    f"grep -nr -q '{deprecated_helper}' {app['setting_path']}/scripts/"
+                )
+                == 0
+            ):
                 yield ("error", "diagnosis_apps_deprecated_practices")
 
-        old_arg_regex = r'^domain=\${?[0-9]'
-        if os.system(f"grep -q '{old_arg_regex}' {app['setting_path']}/scripts/install") == 0:
+        old_arg_regex = r"^domain=\${?[0-9]"
+        if (
+            os.system(
+                f"grep -q '{old_arg_regex}' {app['setting_path']}/scripts/install"
+            )
+            == 0
+        ):
             yield ("error", "diagnosis_apps_deprecated_practices")