@Test public void handleSendWithParent_overrideNull() {

  try (Scope ws = httpTracing.tracing.currentTraceContext().newScope(null)) {
    brave.Span span = handler.handleSendWithParent(request, context);
    // If the overwrite was successful, we have a child span.
    assertThat(span.context().parentIdAsLong()).isEqualTo(context.spanId());
  }
}