Jenkins runs unit tests without setting $wgPFEnableStringFunctions = true; This triggers all the parser tests for string functions to be skipped. Skipping all unit tests in a test suite cause the unit tests to fail.
02:41:51
02:41:51 There was 1 failure:
02:41:51
02:41:51 1) Warning
02:41:51 No tests found in suite "StringFunctionTests::testParserTest".
Version: unspecified
Severity: normal