diff --git a/pyomo/contrib/doe/examples/reactor_kinetics.py b/pyomo/contrib/doe/examples/reactor_kinetics.py
index 65005a254f9..42681e5093d 100644
--- a/pyomo/contrib/doe/examples/reactor_kinetics.py
+++ b/pyomo/contrib/doe/examples/reactor_kinetics.py
@@ -57,7 +57,7 @@ def create_model(
     t_range=[0.0, 1],
     CA_init=1,
     C_init=0.1,
-    design_var_as_param = True
+    design_var_as_param=True,
 ):
     """
     This is an example user model provided to DoE library.
@@ -110,9 +110,7 @@ def create_model(
     mod.t0 = pyo.Set(initialize=[0])
     mod.t_con = pyo.Set(initialize=control_time)
     if design_var_as_param:
-        mod.CA0 = pyo.Param(
-            mod.t0, initialize=CA_init, mutable=True
-        )  # mol/L
+        mod.CA0 = pyo.Param(mod.t0, initialize=CA_init, mutable=True)  # mol/L
     else:
         mod.CA0 = pyo.Var(
             mod.t0, initialize=CA_init, bounds=(1.0, 5.0), within=pyo.NonNegativeReals
@@ -125,12 +123,8 @@ def create_model(
 
     if model_option == ModelOptionLib.stage1:
         if design_var_as_param:
-            mod.T = pyo.Var(
-                mod.t_con,
-                initialize=controls,
-                mutable=True
-            )
-        
+            mod.T = pyo.Var(mod.t_con, initialize=controls, mutable=True)
+
         else:
             mod.T = pyo.Var(
                 mod.t_con,