diff --git a/git_update.sh b/git_update.sh
index 8b6da8a..b55e086 100755
--- a/git_update.sh
+++ b/git_update.sh
@@ -4,18 +4,20 @@
 # Télécharger un minimum de données
 # En cas de conflit donner raison au remote (on écrase les versions locales)
 
+#bien que le minimum
+#bon tag, bonne branche
+#historique bien viré
+#si le tag change, c'est bon
+
+
 declare -A usage
 declare -A varia
 
 summary="$0 [options] <repo>"
 
-usage[b]="Branch of git repo"
-varia[b]=branch
-branch=main
-
-usage[t]="Tag of git repo"
-varia[t]=tag
-tag=
+usage[r]="Reference of wanted commit"
+varia[r]=reference
+reference=main
 
 usage[d]="Destination of clone"
 varia[d]=dst
@@ -75,13 +77,13 @@ if [ -d .git ] ; then
     fi
 
 	run git fetch origin "$branch" --tags
-	run git checkout --force $tagref -B "$branch"
-    run git reset --hard # TODO we can keep some files?
+	run git checkout --force $tagref -B "$branch" #merge in ref
+    #run git reset --hard # TODO we can keep some files?
 	# Preserve existing files in some cases
 	if ! "$nonempty_target" ; then
 		git clean -qffdx
 	fi
-	run git submodule update --init --recursive --force --recommend-shallow
+	run git module update --init --recursive --force --recommend-shallow
 	run git submodule foreach git fetch
 	run git submodule foreach git checkout --force HEAD
 	run git submodule foreach git reset --hard
diff --git a/readme b/readme
new file mode 100644
index 0000000..e69de29
diff --git a/test_git_update.sh b/test_git_update.sh
index 2093801..9a7c178 100755
--- a/test_git_update.sh
+++ b/test_git_update.sh
@@ -4,10 +4,10 @@
 echo "<execution of test_git_update.sh>"
 
 REPO_NAME=performance_testing
-REMOTE_LOCATION=./remote
+REMOTE=ssh://git@git.jean-cloud.net:22529/eleonore/performance_testing.git
 WITH_SUBMODULE="true"
-REMOTE="./remote/performance_testing"
 FILENAMES=("sample0" "sample1")
+FILENAMES_TAG=("sample0")
 TAG_NAME=start
 
 if [ "$WITH_SUBMODULE" = "true" ]; then
@@ -34,17 +34,18 @@ cloning_check(){
     if  [ -d "./$REPO_NAME" ]; then
     echo "$REPO_NAME has been created"
     cloning_result=0
-    cd ./$REPO_NAME
-    for FILE in ${FILENAMES[@]}
+    local FILENAMES=("$@") 
+    echo "--$1--"
+    echo "------------ $FILENAMES -----------------"
+    for FILE in "${FILENAMES[@]}"
     do
         if [ -f "./$REPO_NAME/$FILE" ]; then 
-            echo "the file $FILE was correctly imported"
+            echo "the file $FILE has correctly been imported"
         else 
-            cloning_result=1
             echo "the file $FILE could not be imported"
+            cloning_result=1
         fi
     done  
-    cd ..
 else
     cloning_result=1
     echo "the folder $REPO_NAME could not be created"
@@ -66,6 +67,17 @@ history_check(){
     cd ..
 }
 
+tag_check(){
+    run cd $REPO_NAME
+    run git branch > res
+    if [ $(grep "no branch" res | wc -l) = 1 ];then
+        tag_result=0
+    else
+        tag_result=1
+    fi
+    cd ..
+}
+
 test0 (){
     #CASE 0: git cloned in an empty directory without tag
     section TEST0
@@ -73,15 +85,16 @@ test0 (){
     if [ -d $REPO_NAME ]; then
         rm -rf $REPO_NAME
     fi
-    run ./git_update.sh $REMOTE
+    run ./git_update.sh -d $REPO_NAME $REMOTE
     #checks
-    cloning_check
+    cloning_check "${FILENAMES[@]}"
     history_check
-    case0=$(($history_result+$cloning_result))
-    if [ $case0=0 ]; then
-        echo "case de test 0, dans un dossier vide préexistant, sans historique, sans tag : OK"
+    case0=$history_result+$cloning_result
+    echo "case0 $case0"
+    if [ "$case0" = "0" ]; then
+        echo "case 0, in a empty directory without history, without tag : OK"
     else
-        echo "case de test 0, dans un dossier vide préexistant, sans historique, sans tag : ECHEC"
+        echo "case 0, in a empty directory without history, without tag : FAIL"
     fi
 }
 
@@ -92,17 +105,17 @@ test1(){
     if [ -d $REPO_NAME ]; then
         run rm -rf $REPO_NAME
     fi
-    run ./git_update.sh -r $TAG_NAME $REMOTE 
+    run ./git_update.sh -d $REPO_NAME -r $TAG_NAME $REMOTE 
     #checks
-    cloning_check
+    cloning_check $FILENAMES_TAG
     history_check
-    tagcheck #à ecrire 
+    tag_check 
 
-    case1=
-    if [ "$case1" = "true" ]; then
-        echo "case de test 1, dans un dossier vide préexistant, sans historique, avec tag : OK"
+    case1=$cloning_result+$history_result+$tag_result
+    if [ $case1 = 0 ]; then
+        echo "case 0, in a empty directory without history, with tag : OK"
     else
-        echo "case de test 1, dans un dossier vide préexistant, sans historique, avec tag: ECHEC"
+        echo "case 0, in a empty directory without history, with tag : FAIL"
     fi
 }