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[release/8.0] TimeZoneInfoTests.Platform_TimeZoneNames failing on Android #117903
Description
Build Information
Build: https://dev.azure.com/dnceng-public/cbb18261-c48f-4abb-8651-8cdcb5474649/_build/results?buildId=1101363
Build error leg or test failing: System.Tests.TimeZoneInfoTests.Platform_TimeZoneNames
Pull request: #117873
<test name="System.Tests.TimeZoneInfoTests.Platform_TimeZoneNames(tzi: (UTC+10:00) Australian Eastern Time (Sydney), displayName: \"(UTC+10:00) Eastern Australia Time (Sydney)\", alternativeDisplayName: null, standardName: \"Australian Eastern Standard Time\", daylightName: \"Australian Eastern Daylight Time\", alternativeDaylightName: null)" type="System.Tests.TimeZoneInfoTests" method="Platform_TimeZoneNames" time="0.0006074" result="Fail">
<failure exception-type="Xunit.Sdk.TrueException">
<message><![CDATA[Display Name: Neither '(UTC+10:00) Eastern Australia Time (Sydney)' nor '' equal to '(UTC+10:00) Australian Eastern Time (Sydney)']]></message>
<stack-trace><![CDATA[ at System.Tests.TimeZoneInfoTests.Platform_TimeZoneNames(TimeZoneInfo tzi, String displayName, String alternativeDisplayName, String standardName, String daylightName, String alternativeDaylightName) in /_/src/libraries/System.Runtime/tests/System.Runtime.Tests/System/TimeZoneInfoTests.cs:line 151
at System.Object.InvokeStub_TimeZoneInfoTests.Platform_TimeZoneNames(Object , Span`1 )
at System.Reflection.MethodBaseInvoker.InvokeWithManyArgs(Object obj, BindingFlags invokeAttr, Binder binder, Object[] parameters, CultureInfo culture)]]></stack-trace>
</failure>
</test>Error Message
Fill the error message using step by step known issues guidance.
{
"ErrorMessage": "Display Name: Neither '(UTC+10:00) Eastern Australia Time (Sydney)' nor '' equal to '(UTC+10:00) Australian Eastern Time (Sydney)'",
"ErrorPattern": "",
"BuildRetry": false,
"ExcludeConsoleLog": false
}Known issue validation
Build: 🔎 https://dev.azure.com/dnceng-public/public/_build/results?buildId=1101363
Error message validated: [Display Name: Neither '(UTC+10:00) Eastern Australia Time (Sydney)' nor '' equal to '(UTC+10:00) Australian Eastern Time (Sydney)']
Result validation: ❌ Known issue did not match with the provided build.
Validation performed at: 7/21/2025 11:13:19 PM UTC
Report
Summary
| 24-Hour Hit Count | 7-Day Hit Count | 1-Month Count |
|---|---|---|
| 0 | 0 | 0 |
Activity
tarekgh commented on Jul 21, 2025
CC @matouskozak
matouskozak commented on Jul 22, 2025
I see that it is happening on release/9.0-staging as well and I'm not aware of any globalization changes backported to .NET 9 from our side. @kotlarmilos are you aware of any Android OS updates going on?
kotlarmilos commented on Jul 22, 2025
No, I am not aware of any Android OS updates.
akoeplinger commented on Jul 22, 2025
it's possible that something updated ICU/TZ data on the devices, e.g. through Google Play
tarekgh commented on Jul 22, 2025
Usually we get the TZ display names from ICU, so @akoeplinger highly likely be correct.
matouskozak commented on Aug 7, 2025
The test got modified in #118329
jozkee commented on Aug 15, 2025
I just hit this in 8.0: #118763 (comment)
tarekgh commented on Aug 15, 2025
cc @matouskozak
ManickaP commented on Sep 12, 2025
Another occurrence in #119523
tarekgh commented on Sep 12, 2025
@matouskozak could you please port the fix #118329 to the servicing branches?
akoeplinger commented on Mar 23, 2026
still seeing this in 8.0 servicing PRs, @matouskozak can you please backport #118329 there?
[release/8.0] Partial backport #118329 - disable and modify Android t…