diff --git a/pyomo/contrib/parmest/experiment.py b/pyomo/contrib/parmest/experiment.py
index 69474a32bb0..4f797d6c89c 100644
--- a/pyomo/contrib/parmest/experiment.py
+++ b/pyomo/contrib/parmest/experiment.py
@@ -13,16 +13,17 @@
 class Experiment:
     """
     The experiment class is a template for making experiment lists
-    to pass to parmest.  
-    
-    An experiment is a Pyomo model "m" which is labeled 
+    to pass to parmest.
+
+    An experiment is a Pyomo model "m" which is labeled
     with additional suffixes:
     * m.experiment_outputs which defines experiment outputs
     * m.unknown_parameters which defines parameters to estimate
-    
+
     The experiment class has one required method:
     * get_labeled_model() which returns the labeled Pyomo model
     """
+
     def __init__(self, model=None):
         self.model = model
 
diff --git a/pyomo/contrib/parmest/parmest.py b/pyomo/contrib/parmest/parmest.py
index 8f98ab5cd5a..aecc9d5ebc2 100644
--- a/pyomo/contrib/parmest/parmest.py
+++ b/pyomo/contrib/parmest/parmest.py
@@ -408,7 +408,7 @@ def _expand_indexed_unknowns(self, model_temp):
         Expand indexed variables to get full list of thetas
         """
         model_theta_list = [k.name for k, v in model_temp.unknown_parameters.items()]
-    
+
         # check for indexed theta items
         indexed_theta_list = []
         for theta_i in model_theta_list:
@@ -419,11 +419,11 @@ def _expand_indexed_unknowns(self, model_temp):
                     indexed_theta_list.append(theta_i + '[' + str(ind) + ']')
                 else:
                     indexed_theta_list.append(theta_i)
-    
+
         # if we found indexed thetas, use expanded list
         if len(indexed_theta_list) > len(model_theta_list):
             model_theta_list = indexed_theta_list
-    
+
         return model_theta_list
 
     def _create_parmest_model(self, experiment_number):