--- a/ipc/ipdl/sync-messages.ini
+++ b/ipc/ipdl/sync-messages.ini
@@ -1037,16 +1037,24 @@ description =
 [PUiCompositorController::ResumeAndResize]
 description =
 [PWebRenderBridge::Create]
 description =
 [PWebRenderBridge::DPSyncEnd]
 description =
 [PWebRenderBridge::DPGetSnapshot]
 description =
+[PWebRenderBridge::SetTestSampleTime]
+description = test only
+[PWebRenderBridge::LeaveTestMode]
+description = test only
+[PWebRenderBridge::GetAnimationOpacity]
+description = test only
+[PWebRenderBridge::GetAnimationTransform]
+description = test only
 [PWebRenderBridge::SetAsyncScrollOffset]
 description = test only
 [PWebRenderBridge::SetAsyncZoom]
 description = test only
 [PWebRenderBridge::GetAPZTestData]
 description = test only
 [PHal::GetCurrentBatteryInformation]
 description =