diff --git a/ravenframework/SupervisedLearning/FeatureSelection/utils.py b/ravenframework/SupervisedLearning/FeatureSelection/utils.py
index 714b8d24ef..7abcba65d9 100644
--- a/ravenframework/SupervisedLearning/FeatureSelection/utils.py
+++ b/ravenframework/SupervisedLearning/FeatureSelection/utils.py
@@ -64,8 +64,8 @@ def screenAndTrainEstimator(Xreduced, yreduced, estimator, support, params, incl
     @ In, addOnKeys, list, optional, list of additional keys to remove
     @ Out, None
   """
-  assert (not issubclass(estimator.__class__, SupervisedLearning.SupervisedLearning),
-          f"estimator class str(estimator.__class__) is not a SupervisedLearning derived class")
+  assert issubclass(estimator.__class__, SupervisedLearning.SupervisedLearning), \
+    f"estimator class str(estimator.__class__) is not a SupervisedLearning derived class"
   vals = screenInputParams(support, params, includedParams, addOnKeys = addOnKeys)
   if vals:
     estimator.paramInput.findNodesAndSetValues(vals)