http://hudson.qa.jboss.com/hudson/view/DevStudio/job/jbosstools-nightly/1385/testReport/ :: 1,753 tests (-63)
http://hudson.qa.jboss.com/hudson/view/DevStudio/job/jbosstools-nightly/1384/testReport/ :: 1,816 tests (±0)
Both builds ran on the same server, so it's not an environment problem:
http://hudson.qa.jboss.com/hudson/view/DevStudio/job/jbosstools-nightly/buildTimeTrend
Diffing the two html pages, I found these differences:
New passing test:
JsfAllTests.testVisualRefresh
SeamUiAllTests.testFindShortHand
Missing tests:
ArchivesTestSuite.testArchiveClashingArchiveInModel
SeamAllTests.testButton
SeamCoreAllTests.testCleanBuild
SeamCoreAllTests.testBigProject
SeamCoreAllTests.testCreateCustomProject
SeamCoreAllTests.testEarProject
SeamCoreAllTests.testJiraJbide1544
SeamCoreAllTests.testJiraJbide1631
SeamCoreAllTests.testLoadSerializedModelTime
SeamCoreAllTests.testSeamProperties