diff --git a/src/statistics.py b/src/statistics.py
index 26b2be8854c51584f20b753717ea94cc12967369..6510097fc3c31645bc0fa053a5ade05c3e4d908d 100644
--- a/src/statistics.py
+++ b/src/statistics.py
@@ -103,10 +103,9 @@ def mean_squared_error(a, b):
     return np.square(a - b).mean()
 
 
-class SkillScores(RunEnvironment):
+class SkillScores:
 
     def __init__(self, internal_data):
-        super().__init__()
         self.internal_data = internal_data
 
     def skill_scores(self, window_lead_time):