diff --git a/src/vt/vrt/collection/balance/model/composed_model.cc b/src/vt/vrt/collection/balance/model/composed_model.cc
index f4967337df..f93a5a8c0f 100644
--- a/src/vt/vrt/collection/balance/model/composed_model.cc
+++ b/src/vt/vrt/collection/balance/model/composed_model.cc
@@ -60,7 +60,7 @@ ComposedModel::getModeledLoad(ElementIDStruct object, PhaseOffset when) const {
 }
 
 TimeType
-ComposedModel::getModeledComm(ElementIDStruct object, PhaseOffset when) {
+ComposedModel::getModeledComm(ElementIDStruct object, PhaseOffset when) const {
   return base_->getModeledComm(object, when);
 }
 
diff --git a/src/vt/vrt/collection/balance/model/weighted_communication_volume.cc b/src/vt/vrt/collection/balance/model/weighted_communication_volume.cc
index 62dbc38852..421f519428 100644
--- a/src/vt/vrt/collection/balance/model/weighted_communication_volume.cc
+++ b/src/vt/vrt/collection/balance/model/weighted_communication_volume.cc
@@ -48,7 +48,7 @@ namespace vt { namespace vrt { namespace collection { namespace balance {
 
 TimeType WeightedCommunicationVolume::getModeledLoad(
     ElementIDStruct object, PhaseOffset when
-) {
+) const {
   return alpha_ * ComposedModel::getModeledLoad(object, when) +
     beta_ * ComposedModel::getModeledComm(object, when) + gamma_;
 }
diff --git a/src/vt/vrt/collection/balance/model/weighted_communication_volume.h b/src/vt/vrt/collection/balance/model/weighted_communication_volume.h
index fe8754f03c..f66eda5c1d 100644
--- a/src/vt/vrt/collection/balance/model/weighted_communication_volume.h
+++ b/src/vt/vrt/collection/balance/model/weighted_communication_volume.h
@@ -67,7 +67,7 @@ class WeightedCommunicationVolume : public ComposedModel {
       beta_(beta),
       gamma_(gamma) { }
 
-  TimeType getModeledLoad(ElementIDStruct object, PhaseOffset when) override;
+  TimeType getModeledLoad(ElementIDStruct object, PhaseOffset when) const override;
 
 private:
   double alpha_;
diff --git a/tests/unit/collection/test_model_weighted_communication_volume.nompi.cc b/tests/unit/collection/test_model_weighted_communication_volume.nompi.cc
index 2a31081b98..6271721956 100644
--- a/tests/unit/collection/test_model_weighted_communication_volume.nompi.cc
+++ b/tests/unit/collection/test_model_weighted_communication_volume.nompi.cc
@@ -84,7 +84,7 @@ struct StubModel : LoadModel {
 
   void updateLoads(PhaseType) override { }
 
-  TimeType getModeledLoad(ElementIDStruct id, PhaseOffset phase) override {
+  TimeType getModeledLoad(ElementIDStruct id, PhaseOffset phase) const override {
     const auto work = proc_load_->at(0).at(id).whole_phase_load;
 
     if (phase.subphase == PhaseOffset::WHOLE_PHASE) {
@@ -94,17 +94,17 @@ struct StubModel : LoadModel {
     }
   }
 
-  ObjectIterator begin() override {
+  ObjectIterator begin() const override {
     return {std::make_unique<LoadMapObjectIterator>(
       proc_load_->at(0).begin(), proc_load_->at(0).end()
     )};
   }
 
-  unsigned int getNumCompletedPhases() override { return num_phases; }
+  unsigned int getNumCompletedPhases() const override { return num_phases; }
 
   // Not used in this test
-  int getNumSubphases() override { return 0; }
-  unsigned int getNumPastPhasesNeeded(unsigned int look_back = 0) override {
+  int getNumSubphases() const override { return 0; }
+  unsigned int getNumPastPhasesNeeded(unsigned int look_back = 0) const override {
     return look_back;
   }