diff --git a/src/diagnosis.py b/src/diagnosis.py
index b44028d29..34bdd2e54 100644
--- a/src/diagnosis.py
+++ b/src/diagnosis.py
@@ -656,9 +656,9 @@ class Diagnoser:
 def _list_diagnosis_categories():
 
     paths = glob.glob(os.path.dirname(__file__) + "/diagnosers/??-*.py")
-    names = sorted(
-        [os.path.basename(path)[: -len(".py")].split("-")[-1] for path in paths]
-    )
+    names = [name.split("-")[-1] for name in sorted(
+        [os.path.basename(path)[: -len(".py")] for path in paths]
+    )]
 
     return names