diff --git a/test.sh b/test.sh
index bc30dcd..f269bc2 100755
--- a/test.sh
+++ b/test.sh
@@ -3,22 +3,29 @@ set -u
 set -e
 
 run() {
-	echo "SRC $HOST: $CMD" 1>&2
-	ssh $HOST "$CMD"
+	echo "SRC $HOST ($DIR): $*" 1>&2
+	if [ "$HOST" == "localhost" ]; then
+		echo "$*" | bash
+	else
+		ssh $HOST "cd $DIR; $*"
+	fi
 }
 
 run_src() {
-	CMD="cd ~/Code/modem; $*"
-	HOST="roman@localhost"
-	run
+	DIR=${SRC_DIR:-"~/Code/modem"}
+	HOST=${SRC_HOST:-localhost}
+	run "$*"
 }
 
 run_dst() {
-	CMD="cd ~/Code/modem; $*"
-	HOST="roman@127.0.0.1"
-	run
+	DIR=${DST_DIR:-"~/Code/modem"}
+	HOST=${DST_HOST:-localhost}
+	run "$*"
 }
 
+run_src true
+run_dst true
+
 ## generate 1Mbit of random data
 run_src dd if=/dev/urandom of=data.send bs=125kB count=1 status=none
 SRC_HASH=`run_src sha256sum data.send | ./colorhash.py`