diff --git a/src/spey/base/hypotest_base.py b/src/spey/base/hypotest_base.py
index 6e19bee..5bf6a64 100644
--- a/src/spey/base/hypotest_base.py
+++ b/src/spey/base/hypotest_base.py
@@ -725,8 +725,7 @@ def maximize_likelihood(
             )
 
             pvalues = [
-                1.0
-                - chi2.cdf(
+                chi2.cdf(
                     chi_square,
                     1 if isinstance(poi_test, (float, int)) else len(poi_test),
                 )