diff --git a/scorometer/main.py b/scorometer/main.py
index c6921a8..cbee042 100755
--- a/scorometer/main.py
+++ b/scorometer/main.py
@@ -11,6 +11,9 @@ import operator
 import json
 from mido import MidiFile
 
+BACK_URL = os.environ.get('BACK_URL') or "http://back:3000"
+MUSICS_FOLDER = os.environ.get('MUSICS_FOLDER') or "/musics/"
+
 RATIO = float(sys.argv[2] if len(sys.argv) > 2 else 1)
 OCTAVE = 5
 OCTAVE_AMOUNT_KEYS = 12
@@ -193,13 +196,13 @@ def handleStartMessage(start_message):
 	song_id = start_message["id"]
 	# TODO: use something secure here but I don't find sending a jwt something elegant.
 	user_id = start_message["user_id"]
-	song_path = requests.get(f"http://back:3000/song/{song_id}").json()["midiPath"]
+	song_path = requests.get(f"{BACK_URL}/song/{song_id}").json()["midiPath"];song_path = song_path.replace("/musics/", MUSICS_FOLDER)
 	return mode, song_path, song_id, user_id
 
 
 def sendScore(score, difficulties, song_id, user_id):
 	send({"overallScore": score, "score": difficulties})
-	requests.post(f"http://back:3000/history", json={
+	requests.post(f"{BACK_URL}/history", json={
 		"songID": song_id,
 		"userID": user_id,
 		"score": score,
diff --git a/scorometer/tests/perfect_play/input b/scorometer/tests/perfect_play/input
index 311847d..002e66e 100644
--- a/scorometer/tests/perfect_play/input
+++ b/scorometer/tests/perfect_play/input
@@ -1,2 +1,23 @@
+{"type":"start", "id": 1, "mode": "normal", "user_id": 1}
+{"type": "note_on", "id": 1, "time": 3500, "note": 68}
+{"type": "note_off", "id": 1, "time": 3740, "note": 68}
+{"type": "note_on", "id": 2, "time": 3750, "note": 67}
+{"type": "note_off", "id": 2, "time": 3980, "note": 67}
+{"type": "note_on", "id": 3, "time": 4000, "note": 62}
+{"type": "note_off", "id": 3, "time": 4240, "note": 62}
+{"type": "note_on", "id": 4, "time": 4000, "note": 64}
+{"type": "note_off", "id": 4, "time": 4240, "note": 64}
+{"type": "note_on", "id": 5, "time": 4000, "note": 60}
+{"type": "note_off", "id": 5, "time": 4240, "note": 60}
+{"type": "note_on", "id": 6, "time": 4500, "note": 63}
+{"type": "note_off", "id": 6, "time": 4740, "note": 63}
+{"type": "note_on", "id": 7, "time": 4750, "note": 63}
+{"type": "note_off", "id": 7, "time": 4980, "note": 63}
+{"type": "note_on", "id": 8, "time": 5000, "note": 63}
+{"type": "note_off", "id": 8, "time": 5990, "note": 63}
+{"type": "note_on", "id": 9, "time": 6500, "note": 62}
+{"type": "note_off", "id": 9, "time": 6990, "note": 62}
+{"type": "note_on", "id": 10, "time": 6750, "note": 60}
+{"type": "note_off", "id": 10, "time": 7240, "note": 60}
 {}
 
diff --git a/scorometer/tests/perfect_play/output b/scorometer/tests/perfect_play/output
index 83a6d68..b2525c4 100644
--- a/scorometer/tests/perfect_play/output
+++ b/scorometer/tests/perfect_play/output
@@ -1,2 +1,11 @@
-wowoa
-
+{"id": 1, "timingScore": "perfect", "timingInformation": "perfect"}
+{"id": 2, "timingScore": "perfect", "timingInformation": "perfect"}
+{"id": 3, "timingScore": "perfect", "timingInformation": "perfect"}
+{"id": 4, "timingScore": "perfect", "timingInformation": "perfect"}
+{"id": 5, "timingScore": "perfect", "timingInformation": "perfect"}
+{"id": 6, "timingScore": "perfect", "timingInformation": "perfect"}
+{"id": 7, "timingScore": "perfect", "timingInformation": "perfect"}
+{"id": 8, "timingScore": "perfect", "timingInformation": "perfect"}
+{"id": 9, "timingScore": "perfect", "timingInformation": "perfect"}
+{"id": 10, "timingScore": "perfect", "timingInformation": "perfect"}
+{"overallScore": 1000, "score": {}}
diff --git a/scorometer/tests/runner.sh b/scorometer/tests/runner.sh
index 9b79989..44f4881 100755
--- a/scorometer/tests/runner.sh
+++ b/scorometer/tests/runner.sh
@@ -1,13 +1,20 @@
 #!/bin/sh
 
+EMPTY_DB=$(curl localhost:3000/song/1 -s | jq '.statusCode == 404')
+if [[ $EMPTY_DB == "true" ]]; then
+  curl localhost:3000/song -X POST --data '{"name": "SCORO_TEST", "difficulties": {}, "midiPath": "/musics/SCORO_TEST/SCORO_TEST.midi", "musicXmlPath": "/musics/SCORO_TEST/SCORO_TEST.mxl"}' -H "Content-Type: application/json" &> /dev/null
+fi
+
 TESTS_DONE=0
 TESTS_SUCCESS=0
+TESTS_FAILED=0
 
 function test {
-  cat $1/input | python3 ../main.py &> /tmp/scorometer_res
+  cat $1/input | BACK_URL="http://localhost:3000" MUSICS_FOLDER="../../musics/" python3 ../main.py  | grep -v '"type": "log"' &> /tmp/scorometer_res
   TESTS_DONE=$((TESTS_DONE + 1))
   if ! diff $1/output /tmp/scorometer_res &>/dev/null; then
     echo "$t failed, do runner.sh $t for more info"
+    TESTS_FAILED=$((TESTS_FAILED + 1))
   else
     TESTS_SUCCESS=$((TESTS_SUCCESS + 1))
   fi
@@ -18,18 +25,18 @@ then
   for t in */; do
     test $t
   done
-  echo "$TESTS_SUCCESS succeeded"
-  echo "$TESTS_DONE done"
+  exit $TESTS_FAILED
 else
-  cat $1/input | python3 ../main.py &> /tmp/scorometer_res
-  cho "=========== CURRENT OUTPUT ==========="
+  cat $1/input | BACK_URL="http://localhost:3000" MUSICS_FOLDER="../../musics/" python3 ../main.py | grep -v '"type": "log"' &> /tmp/scorometer_res
+  echo "=========== CURRENT OUTPUT ==========="
   cat /tmp/scorometer_res
   echo "======================================"
   echo "=========== EXPECTED OUTPUT =========="
   cat $1/output
   echo "======================================"
   echo "=============== DIFF ================="
-  diff --side-by-side /tmp/scorometer_res $1/output
+  RET=$(diff --side-by-side -q /tmp/scorometer_res $1/output)
   echo "======================================"
+  exit $RET
 fi;
 
diff --git a/scorometer/tests/test_midi.png b/scorometer/tests/test_midi.png
new file mode 100644
index 0000000..84f68ca
Binary files /dev/null and b/scorometer/tests/test_midi.png differ