diff --git a/ci_course/functionality.py b/ci_course/functionality.py
index 5dc4c85..6367ca0 100644
--- a/ci_course/functionality.py
+++ b/ci_course/functionality.py
@@ -33,7 +33,7 @@ def minimum(*args):
         The minimum
     """
     if not any([isinstance(arg, numbers.Real) for arg in args]):
-            return
+        return
 
     the_min = float("inf")
     for arg in args: