diff --git a/testing/web-platform/meta/MANIFEST.json b/testing/web-platform/meta/MANIFEST.json
index 72d76afb7009..a364288d89e5 100644
--- a/testing/web-platform/meta/MANIFEST.json
+++ b/testing/web-platform/meta/MANIFEST.json
@@ -563803,7 +563803,7 @@
    "support"
   ],
   "interfaces/accelerometer.idl": [
-   "eaa4e8fd76cf191c84921df18e9347a087e8c3d9",
+   "badeb96ae83c8173bb00884346d4f6dc675bbffa",
    "support"
   ],
   "interfaces/ambient-light.idl": [
diff --git a/testing/web-platform/tests/interfaces/accelerometer.idl b/testing/web-platform/tests/interfaces/accelerometer.idl
index df78885d5609..7e5509d432bd 100644
--- a/testing/web-platform/tests/interfaces/accelerometer.idl
+++ b/testing/web-platform/tests/interfaces/accelerometer.idl
@@ -1,11 +1,17 @@
-[Constructor(optional SensorOptions options), SecureContext, Exposed=Window]
+enum LocalCoordinateSystem { "device", "screen" };
+
+dictionary SpatialSensorOptions : SensorOptions {
+  LocalCoordinateSystem referenceFrame = "device";
+};
+
+[Constructor(optional SpatialSensorOptions options), SecureContext, Exposed=Window]
 interface Accelerometer : Sensor {
   readonly attribute double? x;
   readonly attribute double? y;
   readonly attribute double? z;
 };
 
-[Constructor(optional SensorOptions options), SecureContext, Exposed=Window]
+[Constructor(optional SpatialSensorOptions options), SecureContext, Exposed=Window]
 interface LinearAccelerationSensor : Accelerometer {
 };