diff --git a/ortools/constraint_solver/java/RoutingSolverTest.java b/ortools/constraint_solver/java/RoutingSolverTest.java
index cffef8b6a3..d17b8fa1a8 100644
--- a/ortools/constraint_solver/java/RoutingSolverTest.java
+++ b/ortools/constraint_solver/java/RoutingSolverTest.java
@@ -21,6 +21,8 @@ import static org.junit.jupiter.api.Assertions.assertTrue;
 
 import com.google.auto.value.AutoValue;
 import com.google.ortools.Loader;
+import com.google.ortools.constraintsolver.RoutingModelParameters;
+import com.google.ortools.constraintsolver.RoutingSearchParameters;
 import com.google.protobuf.Duration;
 import java.util.ArrayList;
 import java.util.function.LongBinaryOperator;
@@ -692,21 +694,21 @@ public final class RoutingSolverTest {
   }
 
   @Test
-  public void testBoundCost_Ctor() {
+  public void testBoundCost_ctor() {
     // Create Routing Index Manager
     BoundCost boundCost = new BoundCost();
     assertNotNull(boundCost);
     assertEquals(0, boundCost.getBound());
     assertEquals(0, boundCost.getCost());
 
-    boundCost = new BoundCost(97 /*bound*/, 101 /*cost*/);
+    boundCost = new BoundCost(/*bound=*/97, /*cost=*/101);
     assertNotNull(boundCost);
     assertEquals(97, boundCost.getBound());
     assertEquals(101, boundCost.getCost());
   }
 
   @Test
-  public void testRoutingDimension_Ctor() {
+  public void testRoutingDimension_ctor() {
     final RoutingIndexManager manager = new RoutingIndexManager(31, 7, 3);
     assertNotNull(manager);
     final RoutingModel model = new RoutingModel(manager);
@@ -718,10 +720,11 @@ public final class RoutingSolverTest {
     });
     assertTrue(model.addDimension(transitIndex, 100, 100, true, "Dimension"));
     final RoutingDimension dimension = model.getMutableDimension("Dimension");
+    assertNotNull(dimension);
   }
 
   @Test
-  public void testRoutingDimension_SoftSpanUpperBound() {
+  public void testRoutingDimension_softSpanUpperBound() {
     final RoutingIndexManager manager = new RoutingIndexManager(31, 7, 3);
     assertNotNull(manager);
     final RoutingModel model = new RoutingModel(manager);
@@ -734,7 +737,7 @@ public final class RoutingSolverTest {
     assertTrue(model.addDimension(transitIndex, 100, 100, true, "Dimension"));
     final RoutingDimension dimension = model.getMutableDimension("Dimension");
 
-    final BoundCost boundCost = new BoundCost(97 /*bound*/, 101 /*cost*/);
+    final BoundCost boundCost = new BoundCost(/*bound=*/97, /*cost=*/101);
     assertNotNull(boundCost);
     assertFalse(dimension.hasSoftSpanUpperBounds());
     for (int v : IntStream.range(0, manager.getNumberOfVehicles()).toArray()) {
@@ -748,7 +751,7 @@ public final class RoutingSolverTest {
   }
 
   @Test
-  public void testRoutingDimension_QuadraticCostSoftSpanUpperBound() {
+  public void testRoutingDimension_quadraticCostSoftSpanUpperBound() {
     final RoutingIndexManager manager = new RoutingIndexManager(31, 7, 3);
     assertNotNull(manager);
     final RoutingModel model = new RoutingModel(manager);
@@ -761,7 +764,7 @@ public final class RoutingSolverTest {
     assertTrue(model.addDimension(transitIndex, 100, 100, true, "Dimension"));
     final RoutingDimension dimension = model.getMutableDimension("Dimension");
 
-    final BoundCost boundCost = new BoundCost(97 /*bound*/, 101 /*cost*/);
+    final BoundCost boundCost = new BoundCost(/*bound=*/97, /*cost=*/101);
     assertNotNull(boundCost);
     assertFalse(dimension.hasQuadraticCostSoftSpanUpperBounds());
     for (int v : IntStream.range(0, manager.getNumberOfVehicles()).toArray()) {
diff --git a/ortools/constraint_solver/java/routing.i b/ortools/constraint_solver/java/routing.i
index e88887b2d6..34ccaff5f8 100644
--- a/ortools/constraint_solver/java/routing.i
+++ b/ortools/constraint_solver/java/routing.i
@@ -252,15 +252,12 @@ import java.util.function.LongBinaryOperator;
 %rename (getCumulVarSoftUpperBoundCoefficient) RoutingDimension::GetCumulVarSoftUpperBoundCoefficient;
 %rename (getGlobalSpanCostCoefficient) RoutingDimension::global_span_cost_coefficient;
 %rename (getLocalOptimizerOffsetForVehicle) RoutingDimension::GetLocalOptimizerOffsetForVehicle;
-
 %rename (setSoftSpanUpperBoundForVehicle) RoutingDimension::SetSoftSpanUpperBoundForVehicle;
 %rename (hasSoftSpanUpperBounds) RoutingDimension::HasSoftSpanUpperBounds;
 %rename (getSoftSpanUpperBoundForVehicle) RoutingDimension::GetSoftSpanUpperBoundForVehicle;
-
 %rename (setQuadraticCostSoftSpanUpperBoundForVehicle) RoutingDimension::SetQuadraticCostSoftSpanUpperBoundForVehicle;
 %rename (hasQuadraticCostSoftSpanUpperBounds) RoutingDimension::HasQuadraticCostSoftSpanUpperBounds;
 %rename (getQuadraticCostSoftSpanUpperBoundForVehicle) RoutingDimension::GetQuadraticCostSoftSpanUpperBoundForVehicle;
-
 %rename (getGroupDelay) RoutingDimension::GetGroupDelay;
 %rename (getNodeVisitTransitsOfVehicle) RoutingDimension::GetNodeVisitTransitsOfVehicle;
 %rename (getSpanCostCoefficientForVehicle) RoutingDimension::GetSpanCostCoefficientForVehicle;
diff --git a/ortools/constraint_solver/python/pywrapcp_test.py b/ortools/constraint_solver/python/pywrapcp_test.py
index 492a732579..2f6d1506d6 100755
--- a/ortools/constraint_solver/python/pywrapcp_test.py
+++ b/ortools/constraint_solver/python/pywrapcp_test.py
@@ -15,6 +15,7 @@
 
 import sys
 import unittest
+
 from ortools.constraint_solver import pywrapcp
 
 
diff --git a/ortools/constraint_solver/python/pywraprouting_test.py b/ortools/constraint_solver/python/pywraprouting_test.py
index 574f4c7eff..a0070166ee 100755
--- a/ortools/constraint_solver/python/pywraprouting_test.py
+++ b/ortools/constraint_solver/python/pywraprouting_test.py
@@ -88,8 +88,7 @@ class TestRoutingIndexManager(unittest.TestCase):
         for i in range(manager.GetNumberOfVehicles()):
             self.assertEqual(i + 1,
                              manager.IndexToNode(manager.GetStartIndex(i)))
-            self.assertEqual(i + 4,
-                             manager.IndexToNode(manager.GetEndIndex(i)))
+            self.assertEqual(i + 4, manager.IndexToNode(manager.GetEndIndex(i)))
 
 
 class TestRoutingModel(unittest.TestCase):
@@ -403,8 +402,7 @@ class TestRoutingModel(unittest.TestCase):
             partial(TransitDistance, manager))
         model.SetArcCostEvaluatorOfAllVehicles(transit_idx)
         # Add constant dimension
-        constant_id, success = model.AddConstantDimension(
-            1, 100, True, 'count')
+        constant_id, success = model.AddConstantDimension(1, 100, True, 'count')
         self.assertTrue(success)
         self.assertEqual(transit_idx + 1, constant_id)
         count_dimension = model.GetDimensionOrDie('count')
@@ -492,8 +490,7 @@ class TestRoutingModel(unittest.TestCase):
         index = model.Start(0)
         cumul = 0
         while not model.IsEnd(index):
-            self.assertEqual(cumul,
-                             assignment.Value(dimension.CumulVar(index)))
+            self.assertEqual(cumul, assignment.Value(dimension.CumulVar(index)))
             prev_index = index
             index = assignment.Value(model.NextVar(index))
             cumul += matrix[manager.IndexToNode(prev_index)][
diff --git a/ortools/constraint_solver/routing.h b/ortools/constraint_solver/routing.h
index d83bf15a10..2945ca2769 100644
--- a/ortools/constraint_solver/routing.h
+++ b/ortools/constraint_solver/routing.h
@@ -2673,8 +2673,10 @@ class TypeRegulationsConstraint : public Constraint {
 struct BoundCost {
   int64_t bound;
   int64_t cost;
-  BoundCost(int64_t bound = 0, int64_t cost = 0): bound(bound), cost(cost) {}
+  BoundCost(): bound(0), cost(0) {}
+  BoundCost(int64_t bound, int64_t cost): bound(bound), cost(cost) {}
 };
+
 class SimpleBoundCosts {
  public:
   SimpleBoundCosts(int num_bounds, BoundCost default_bound_cost)
diff --git a/ortools/constraint_solver/routing_lp_scheduling.cc b/ortools/constraint_solver/routing_lp_scheduling.cc
index f770970895..5527e7339c 100644
--- a/ortools/constraint_solver/routing_lp_scheduling.cc
+++ b/ortools/constraint_solver/routing_lp_scheduling.cc
@@ -1846,7 +1846,7 @@ bool DimensionCumulOptimizerCore::SetRouteCumulConstraints(
   }
   // Add soft span cost.
   if (optimize_costs && dimension_->HasSoftSpanUpperBounds()) {
-    BoundCost bound_cost =
+    const BoundCost bound_cost =
         dimension_->GetSoftSpanUpperBoundForVehicle(vehicle);
     if (bound_cost.bound < std::numeric_limits<int64_t>::max() &&
         bound_cost.cost > 0) {