diff --git a/testing/web-platform/tests/resources/chromium/generic_sensor_mocks.js b/testing/web-platform/tests/resources/chromium/generic_sensor_mocks.js
index a7272a65fa3e..eb28c48d3a71 100644
--- a/testing/web-platform/tests/resources/chromium/generic_sensor_mocks.js
+++ b/testing/web-platform/tests/resources/chromium/generic_sensor_mocks.js
@@ -124,7 +124,7 @@ var GenericSensorTest = (() => {
   class MockSensorProvider {
     constructor() {
       this.readingSizeInBytes_ =
-          device.mojom.SensorInitParams.kReadBufferSizeForTests;
+          device.mojom.SensorInitParams.READ_BUFFER_SIZE_FOR_TESTS;
       this.sharedBufferSizeInBytes_ = this.readingSizeInBytes_ *
               (device.mojom.SensorType.MAX_VALUE + 1);
       const rv = Mojo.createSharedBuffer(this.sharedBufferSizeInBytes_);