diff --git a/common.config b/common.config
index dda4b93b..951587da 100644
--- a/common.config
+++ b/common.config
@@ -73,6 +73,8 @@ export HOST_OPTIONS=${HOST_OPTIONS:=local.config}
 export CHECK_OPTIONS=${CHECK_OPTIONS:="-g auto"}
 export BENCH_PASSES=${BENCH_PASSES:=5}
 export XFS_MKFS_OPTIONS=${XFS_MKFS_OPTIONS:=-bsize=4096}
+export TIME_FACTOR=${TIME_FACTOR:=1}
+export LOAD_FACTOR=${LOAD_FACTOR:=1}
 
 export PWD=`pwd`
 #export DEBUG=${DEBUG:=...} # arbitrary CFLAGS really.
diff --git a/group b/group
index f9c77539..035ddfe7 100644
--- a/group
+++ b/group
@@ -113,7 +113,12 @@ dangerous
 # on current systems
 deprecated
 
-#
+# Stress test with probable behaviour, the longer test run the
+# larger corner cases will be covered. Configurable variables:
+# LOAD_FACTOR: Usually means factor number of running tasks
+# TIME_FACTOR: Usually means factor of run time, or number of operations
+stress
+
 # test-group association ... one line per test
 #
 001 rw dir udf auto quick