For example, from https://chromium-swarm.appspot.com/task?id=3a03a8c2f18aab10&refresh=10&show_raw=1:

[ RUN      ] AppWindowInteractiveTest.TestCreate

[2420:1848:1123/134526.826:WARNING:chrome_browser_main_win.cc(613)] Command line too long for RegisterApplicationRestart:  --brave-new-test-launcher --cfi-diag=0 --gtest_also_run_disabled_tests --gtest_filter=AppWindowInteractiveTest.TestCreate --single_process --snapshot-output-dir="C:\b\s\w\iosrokli" --test-launcher-bot-mode --test-launcher-output="C:\Users\CHROME~1\AppData\Local\Temp\scoped_dir1192_14406\results1192_1873\test_results.xml" --test-launcher-summary-output="C:\b\s\w\iosrokli\output.json" --user-data-dir="C:\Users\CHROME~1\AppData\Local\Temp\scoped_dir1192_14406\d1192_26452" --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 --enable-features=TestFeatureForBrowserTest1 --disable-features=NetworkPrediction,TestFeatureForBrowserTest2 --flag-switches-begin --flag-switches-end --restore-last-session about:blank

[2420:1848:1123/134527.718:INFO:CONSOLE(0)] "[SUCCESS] createUnfocusedWindow", source: chrome-extension://opojjnenkoifgfcngkbokaekgamhgjli/_generated_background_page.html (0)

[2420:1848:1123/134527.753:INFO:CONSOLE(0)] "[SUCCESS] createTwiceUnfocused", source: chrome-extension://opojjnenkoifgfcngkbokaekgamhgjli/_generated_background_page.html (0)

[2420:1848:1123/134527.787:INFO:CONSOLE(0)] "[SUCCESS] createFocusedWindow", source: chrome-extension://opojjnenkoifgfcngkbokaekgamhgjli/_generated_background_page.html (0)

[2420:1848:1123/134527.788:INFO:CONSOLE(0)] "[FAIL] createFocusedWindow: Callback has already been run. First call:

    at extensions::test:82:16

    at extensions::test:303:7

Second call:

    at extensions::test:80:25

    at extensions::test:303:7

Error

    at Object.handleRequest (extensions::binding:64:27)

    at Object.<anonymous> (extensions::binding:374:32)

    at extensions::test:75:20

    at extensions::test:303:7", source: chrome-extension://opojjnenkoifgfcngkbokaekgamhgjli/_generated_background_page.html (0)

[2420:1848:1123/134527.788:INFO:CONSOLE(138)] "Uncaught chrome.test.failure", source: extensions::test (138)

[2420:1848:1123/134527.857:INFO:CONSOLE(0)] "[SUCCESS] createTwiceFocusUnfocus", source: chrome-extension://opojjnenkoifgfcngkbokaekgamhgjli/_generated_background_page.html (0)

[2420:1848:1123/134527.872:INFO:CONSOLE(0)] "[FAIL] createTwiceUnfocusFocus: window has been focused

Error

    at Object.handleRequest (extensions::binding:64:27)

    at Object.<anonymous> (extensions::binding:374:32)

    at Object.<anonymous> (extensions::test:168:18)

    at Object.handleRequest (extensions::binding:64:27)

    at Object.<anonymous> (extensions::binding:374:32)

    at Object.<anonymous> (extensions::test:152:16)

    at Object.handleRequest (extensions::binding:64:27)

    at Object.<anonymous> (extensions::binding:374:32)

    at chrome-extension://opojjnenkoifgfcngkbokaekgamhgjli/test.js:18:17

    at safeFunctionApply (extensions::test:275:26)", source: chrome-extension://opojjnenkoifgfcngkbokaekgamhgjli/_generated_background_page.html (0)

[2420:1848:1123/134527.872:INFO:CONSOLE(278)] "Uncaught chrome.test.failure", source: extensions::test (278)

../../chrome/browser/apps/app_window_interactive_uitest.cc(414): error: Value of: RunAppWindowInteractiveTest("testCreate")

  Actual: false

Expected: true

Failed 2 of 6 tests

[220:2228:1123/134527.888:WARNING:ipc_message_attachment_set.cc(49)] MessageAttachmentSet destroyed with unconsumed attachments: 0/1

[2420:1848:1123/134527.915:INFO:chrome_cryptauth_service.cc(222)] Profile is not authenticated yet; waiting before starting CryptAuth managers.

[  FAILED  ] AppWindowInteractiveTest.TestCreate, where TypeParam =  and GetParam() =  (1149 ms)