diff --git a/tests/test_PostProcessing.py b/tests/test_PostProcessing.py
index c94e587af3d692229d1318dd5294377087c9ac70..95afa3e9e2331e0964852ea05ed0e6d3c5b4b26f 100644
--- a/tests/test_PostProcessing.py
+++ b/tests/test_PostProcessing.py
@@ -228,26 +228,7 @@ def test_check_reg_quality_pce(pce_engine) -> None:
 
 #%% _get_sample
 #%% _eval_model
-#%% _plot_validation
-def test_plot_validation(pce_engine) -> None:
-    """
-    Check the regression quality for PCE metamodel
-    """
-    engine = pce_engine
-    post = PostProcessing(engine)
-    post.pce_out_mean, post.pce_out_std = engine.eval_metamodel([[0],[0.5]])
-    post.model_out_dict = {'Z': [[0.4],[0.3]]}
-    post._plot_validation()
 
-def test_plot_validation(gpe_engine) -> None:
-    """
-    Check the regression quality for PCE metamodel
-    """
-    engine = pce_engine
-    post = PostProcessing(engine)
-    post.pce_out_mean, post.pce_out_std = engine.eval_metamodel([[0],[0.5]])
-    post.model_out_dict = {'Z': [[0.4],[0.3]]}
-    post._plot_validation()
 
 #%% _plot_validation_multi
     
\ No newline at end of file