At least trafficserver is known to not start on partitions on testnode like:

/srv/slapgrid/slappartX/srv/testnode/XXX/inst/test0-0/tmp/inst/TestSlaveGlobalDisableHttp2-1

so shorten the TestSlaveGlobalDisableHttp2 and others to simple T, which will result with path:

/srv/slapgrid/slappartX/srv/testnode/XXX/inst/test0-0/tmp/inst/T-1