in src/test-info/test-info.ts [188:197]
setDisplayName(relativeToItem?: TestCaseInfo | undefined) {
if (relativeToItem?.type === TestItemType.SourceDirectory) {
this.testItem.label = path.relative(
(relativeToItem as SourceDirTestCaseInfo).dir,
this.dir
)
} else {
this.testItem.label = this.dir
}
}