diff --git a/tools/testing/ktest/ktest.pl b/tools/testing/ktest/ktest.pl
index d0e1de6..24286ce 100755
--- a/tools/testing/ktest/ktest.pl
+++ b/tools/testing/ktest/ktest.pl
@@ -27,7 +27,7 @@
 $default{"BUILD_TYPE"}		= "randconfig";
 $default{"MAKE_CMD"}		= "make";
 $default{"TIMEOUT"}		= 120;
-$default{"TMP_DIR"}		= "/tmp/ktest";
+$default{"TMP_DIR"}		= "/tmp/ktest/\${MACHINE}";
 $default{"SLEEP_TIME"}		= 60;	# sleep time between tests
 $default{"BUILD_NOCLEAN"}	= 0;
 $default{"REBOOT_ON_ERROR"}	= 0;
diff --git a/tools/testing/ktest/sample.conf b/tools/testing/ktest/sample.conf
index 1092e47..e2d8d83 100644
--- a/tools/testing/ktest/sample.conf
+++ b/tools/testing/ktest/sample.conf
@@ -392,8 +392,8 @@
 #ADD_CONFIG = /home/test/config-broken
 
 # The location on the host where to write temp files
-# (default /tmp/ktest)
-#TMP_DIR = /tmp/ktest
+# (default /tmp/ktest/${MACHINE})
+#TMP_DIR = /tmp/ktest/${MACHINE}
 
 # Optional log file to write the status (recommended)
 #  Note, this is a DEFAULT section only option.