pytest 8 emits timestamp in ISO format with TZ, choking LocalDateTime in TestSuite

[colindean]

I'm seeing this in my test results upload:

Error publishing results to Projektor server https://projektor.mycompany.com Request failed with status code 400
Error from server Problem parsing test results: Cannot deserialize value of type `java.time.LocalDateTime` from String "2025-08-28T20:34:02.247682+00:00": Failed to deserialize java.time.LocalDateTime: (java.time.format.DateTimeParseException) Text '2025-08-28T20:34:02.247682+00:00' could not be parsed, unparsed text found at index 26
 at [Source: (StringReader); line: 3, column: 45] (through reference chain: projektor.parser.model.TestSuitesWrapper["testsuites"]->java.util.ArrayList[0]->projektor.parser.model.TestSuites["testsuite"]->java.util.ArrayList[0]->projektor.parser.model.TestSuite["timestamp"])

This leads me to:

projektor/server/parsing/junit-results-parser/src/main/java/projektor/parser/model/TestSuite.java

Line 17 in f6fa72d

public LocalDateTime timestamp;

java.time.LocalDateTime cannot handle timezones, i.e. the +00:00.

I'm uploading results generated using pytest v8.

pytest up to 8.2 did not include the timezone, but pytest v8.3 added it.

8.2.2:

https://github.com/pytest-dev/pytest/blob/329d3712146e69c471be3e30883d54bdde2f76cb/src/_pytest/junitxml.py#L674

8.3.0:

https://github.com/pytest-dev/pytest/blob/a7d5a8eba9addd119432fa71880b51052a89812f/src/_pytest/junitxml.py#L668-L670

This was done in pytest-dev/pytest@0ed2d79.

Projektor needs to be able to handle a TZ in the timestamp, it seems, in order to continue working with modern pytest versions, as there's no way in pytest to alter this behavior.

[colindean]

The PR where this was changed has a comment:

I don't know the knock-on effects very well though.

[colindean]

Gradle quietly added milliseconds in gradle/gradle#31940 but that remained parseable.

I think projektor should fix this and can do so pretty easily, but for reasons I think it might be a while before my org would get the fix into our production projektor instance…

so I might try to get a PR into pytest that makes the TZ optional.