diff --git a/deepmd/pt/model/task/ener.py b/deepmd/pt/model/task/ener.py
index 91ccd03d9a..e40a6bda44 100644
--- a/deepmd/pt/model/task/ener.py
+++ b/deepmd/pt/model/task/ener.py
@@ -355,7 +355,6 @@ def forward(
 
 
 @Fitting.register("ener")
-@fitting_check_output
 class EnergyFittingNet(InvarFitting):
     def __init__(
         self,