diff --git a/application/src/test/java/org/opentripplanner/apis/gtfs/mapping/routerequest/RouteRequestMapperCarTest.java b/application/src/test/java/org/opentripplanner/apis/gtfs/mapping/routerequest/RouteRequestMapperCarTest.java
index 6c8109676f0..f1912ee57f2 100644
--- a/application/src/test/java/org/opentripplanner/apis/gtfs/mapping/routerequest/RouteRequestMapperCarTest.java
+++ b/application/src/test/java/org/opentripplanner/apis/gtfs/mapping/routerequest/RouteRequestMapperCarTest.java
@@ -19,14 +19,26 @@ class RouteRequestMapperCarTest {
   void testBasicCarPreferences() {
     var carArgs = createArgsCopy(RouteRequestMapperTest.ARGS);
     var reluctance = 7.5;
+    var boardCost = Cost.costOfSeconds(500);
     carArgs.put(
       "preferences",
-      Map.ofEntries(entry("street", Map.ofEntries(entry("car", Map.of("reluctance", reluctance)))))
+      Map.ofEntries(
+        entry(
+          "street",
+          Map.ofEntries(
+            entry(
+              "car",
+              Map.ofEntries(entry("reluctance", reluctance), entry("boardCost", boardCost))
+            )
+          )
+        )
+      )
     );
     var env = executionContext(carArgs, Locale.ENGLISH, RouteRequestMapperTest.CONTEXT);
     var routeRequest = RouteRequestMapper.toRouteRequest(env, RouteRequestMapperTest.CONTEXT);
     var carPreferences = routeRequest.preferences().car();
     assertEquals(reluctance, carPreferences.reluctance());
+    assertEquals(boardCost.toSeconds(), carPreferences.boardCost());
   }
 
   @Test
diff --git a/application/src/test/java/org/opentripplanner/routing/api/request/preference/CarPreferencesTest.java b/application/src/test/java/org/opentripplanner/routing/api/request/preference/CarPreferencesTest.java
index 6b03873b80d..564baa0330d 100644
--- a/application/src/test/java/org/opentripplanner/routing/api/request/preference/CarPreferencesTest.java
+++ b/application/src/test/java/org/opentripplanner/routing/api/request/preference/CarPreferencesTest.java
@@ -11,6 +11,7 @@
 class CarPreferencesTest {
 
   private static final double RELUCTANCE = 5.111;
+  public static final int BOARD_COST = 550;
   private static final double EXPECTED_RELUCTANCE = 5.1;
   private static final int PICKUP_TIME = 600;
   private static final int PICKUP_COST = 500;
@@ -22,6 +23,7 @@ class CarPreferencesTest {
   private final CarPreferences subject = CarPreferences
     .of()
     .withReluctance(RELUCTANCE)
+    .withBoardCost(BOARD_COST)
     .withPickupTime(Duration.ofSeconds(PICKUP_TIME))
     .withPickupCost(PICKUP_COST)
     .withAccelerationSpeed(ACCELERATION_SPEED)
@@ -35,6 +37,11 @@ void reluctance() {
     assertEquals(EXPECTED_RELUCTANCE, subject.reluctance());
   }
 
+  @Test
+  void boardCost() {
+    assertEquals(BOARD_COST, subject.boardCost());
+  }
+
   @Test
   void pickupTime() {
     assertEquals(Duration.ofSeconds(PICKUP_TIME), subject.pickupTime());
@@ -85,6 +92,7 @@ void testToString() {
     assertEquals(
       "CarPreferences{" +
       "reluctance: 5.1, " +
+      "boardCost: $550, " +
       "parking: VehicleParkingPreferences{cost: $30}, " +
       "rental: VehicleRentalPreferences{pickupTime: 30s}, " +
       "pickupTime: PT10M, " +