diff --git a/src/Utils.H b/src/Utils.H
index 66d0e29..eb0a05d 100644
--- a/src/Utils.H
+++ b/src/Utils.H
@@ -75,7 +75,7 @@ struct TestParams
     int nborhood_size = 500;
     int workgroup_size = 20;
 
-    bool fast = true;       /*!< Use the fast implementations for various operations, e.g. binning, at the cost of
+    bool fast = false;       /*!< Use the fast implementations for various operations, e.g. binning, at the cost of
                                  exact reproducibility for a given random seed. */
 };
 
diff --git a/src/main.cpp b/src/main.cpp
index 0aa6248..9ff47b3 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -188,6 +188,8 @@ void runAgent ()
     mask_behavior.setVal(1);
 
     AgentContainer pc(geom, dm, ba, params.num_diseases, params.disease_names, params.fast, params.ic_type);
+    bool stable_redistribute = !params.fast;
+    pc.setStableRedistribute(stable_redistribute);
 
     {
         BL_PROFILE_REGION("Initialization");