null);
// just to grab UA
final Builder builder = testSubject.prepare(new RemoteStorageContextCustomizer(globalRemoteStorageContext));
final String userAgent = builder.getUserAgent();
final HttpClient client = builder.build();
activity.perform(client);
assertThat(userAgentChecker.getUserAgents(), hasSize(1)); // same UA should be used even if multiple reqs
assertThat(userAgentChecker.getUserAgents().iterator().next(), equalTo(userAgent)); // the one we set must be used