Example: https://ci.chromium.org/buildbot/chromium.fyi/Mojo%20Windows/14433

[ RUN      ] PolicyToolUITest.DefaultSession
[4536:7132:0418/113538.326:WARNING:discovery_network_list_win.cc(195)] Failed to open Wlan client handle: 1062
[4536:4672:0418/113538.331:WARNING:chrome_browser_main_win.cc(630)] Command line too long for RegisterApplicationRestart:  --brave-new-test-launcher --cfi-diag=0 --enable-surface-synchronization --gtest_also_run_disabled_tests --gtest_filter=PolicyToolUITest.DefaultSession --single_process --test-launcher-bot-mode --test-launcher-output="C:\Users\CHROME~2\AppData\Local\Temp\scoped_dir4936_13338\results4936_8857\test_results.xml" --test-launcher-summary-output="e:\b\swarm_slave\w\iote3r5n\output.json" --user-data-dir="C:\Users\CHROME~2\AppData\Local\Temp\scoped_dir4936_13338\d4936_14021" --disable-offline-auto-reload --no-first-run --no-default-browser-check --enable-logging=stderr --disable-default-apps --wm-window-animations-disabled --disable-component-update --test-type=browser --force-color-profile=srgb --disable-zero-browsers-open-for-tests --ipc-connection-timeout=30 --allow-file-access-from-files --dom-automation --log-gpu-control-list-decisions --disable-backgrounding-occluded-windows --disable-gl-drawing-for-tests --override-use-software-gl-for-tests --force-color-profile=srgb --disable-compositor-ukm-for-tests --enable-features=PolicyTool,TestFeatureForBrowserTest1 --disable-features=NetworkPrediction,TestFeatureForBrowserTest2 --flag-switches-begin --flag-switches-end --restore-last-session about:blank
../../chrome/browser/ui/webui/policy_tool_ui_browsertest.cc(406): error: Value of: base::PathExists(GetSessionPath(GetDefaultSessionName()))
  Actual: false
Expected: true
Stack trace:
Backtrace:
	StackTraceGetter::CurrentStackTrace [0x00F41488+40]
	testing::internal::UnitTestImpl::CurrentOsStackTraceExceptTop [0x00F4A0E3+69]
	testing::internal::AssertHelper::operator= [0x00F49D48+48]
	PolicyToolUITest_DefaultSession_Test::RunTestOnMainThread [0x008FBC3E+238]
	content::BrowserTestBase::ProxyRunTestOnMainThreadLoop [0x02569266+374]
	ChromeBrowserMainParts::PreMainMessageLoopRunImpl [0x02AE662A+3196]
	ChromeBrowserMainParts::PreMainMessageLoopRun [0x02AE58F1+145]
	content::BrowserMainLoop::PreMainMessageLoopRun [0x016C8E84+68]
	content::StartupTaskRunner::RunAllTasksNow [0x01940005+23]
	content::BrowserMainLoop::CreateStartupTasks [0x016C7F49+615]
	content::BrowserMainRunnerImpl::Initialize [0x016CAE84+100]
	content::BrowserMain [0x016C64BA+138]
	content::RunNamedProcessTypeMain [0x023EEA03+123]
	content::ContentMainRunnerImpl::Run [0x023EEE4E+142]
	service_manager::Main [0x034ACC02+622]
	content::ContentMain [0x023EE92F+51]
	content::BrowserTestBase::SetUp [0x0256902A+1498]
[4536:4672:0418/113541.815:WARNING:pref_notifier_impl.cc(23)] Pref observer found at shutdown.
[4536:4672:0418/113541.815:WARNING:pref_notifier_impl.cc(23)] Pref observer found at shutdown.