diff --git a/test_git_update.sh b/test_git_update.sh
index 7b5724f..62941c6 100755
--- a/test_git_update.sh
+++ b/test_git_update.sh
@@ -39,27 +39,30 @@ DESCRIPTION
 }
 
 cloning_check(){
-    if  [ -d "./$REPO_NAME" ]; then
-    echo "$REPO_NAME has been created"
-    cloning_result=0
-    local FILENAMES=$@ 
-    for FILE in ${FILENAMES[@]}
-    do
-        if [ -f "./$REPO_NAME/$FILE" ]; then 
-            echo "the file $FILE has correctly been imported"
-        else 
-            echo "the file $FILE could not be imported"
-            cloning_result=1
-        fi
-    done  
-else
-    cloning_result=1
-    echo "the folder $REPO_NAME could not be created"
-fi
+    local input=("$@")
+    local repo_name=${input[0]}
+    local FILENAMES=${input[@]:1}
+    if  [[ -d "./$repo_name" ]]; then
+        echo "into $repo_name"
+        cloning_result=0
+        for FILE in ${FILENAMES[@]}
+        do  
+            if [ -f "./$repo_name/$FILE" ]; then 
+                echo "the file $FILE has correctly been imported"
+            else 
+                echo "the file $FILE could not be imported"
+                cloning_result=1
+            fi
+        done  
+    else
+        cloning_result=1
+        echo "the directory $repo_name could not be created"
+    fi
 }
 
 history_check(){
-    run cd $REPO_NAME
+    local repo_name=$1
+    cd $repo_name
     history_result=0
     if [ $(git log | grep "commit" | wc -l) -gt 1 ]; then
         echo "Several commits have been saved"
@@ -74,8 +77,9 @@ history_check(){
 }
 
 tag_check(){
-    run cd $REPO_NAME
-    run git branch > res
+    local repo_name=$1
+    cd $repo_name
+    run $(git branch) > res
     if [ $(grep "no branch" res | wc -l) = 1 ];then
         echo "The tag instruction has been respected"
         tag_result=0
@@ -87,8 +91,9 @@ tag_check(){
 }
 
 branch_check(){
-     run cd $REPO_NAME
-    run git branch > res
+    local repo_name=$1
+     run cd $repo_name
+    run $(git branch) > res
     if [ $(grep $BRANCH_NAME res | wc -l) = 1 ];then
         echo "The branch instruction has been respected"
         branch_result=0
@@ -108,8 +113,8 @@ test0 (){
     fi
     run ./git_update.sh -d $REPO_NAME $REMOTE
     #checks
-    cloning_check ${FILENAMES[@]}
-    history_check
+    cloning_check $REPO_NAME ${FILENAMES[@]}
+    history_check $REPO_NAME
     case0=$(($history_result+$cloning_result))
     if [ "$case0" = "0" ]; then
         echo "case 0, in a empty directory without history: OK"
@@ -127,9 +132,9 @@ test1(){
     fi
     run ./git_update.sh -d $REPO_NAME -r $TAG_NAME $REMOTE  
     #checks
-    cloning_check $FILENAMES_TAG
-    history_check
-    tag_check 
+    cloning_check $REPO_NAME ${FILENAMES_TAG[@]}
+    history_check $REPO_NAME
+    tag_check $REPO_NAME
 
     case1=$(($cloning_result+$history_result+$tag_result))
     if [ $case1 = 0 ]; then
@@ -148,18 +153,62 @@ test2(){
     fi
     run ./git_update.sh -d $REPO_NAME -r $BRANCH_NAME $REMOTE  
     #checks
-    cloning_check $FILENAMES_BRANCH #we do not check for all files, especially not those specific to the branch.
-    history_check
-    branch_check 
+    cloning_check $REPO_NAME ${FILENAMES_BRANCH[@]} #we do not check for all files, especially not those specific to the branch.
+    history_check $REPO_NAME
+    branch_check $REPO_NAME
 
-    case1=$(($cloning_result+$history_result+$branch_result))
-    if [ $case1 = 0 ]; then
-        echo "case 1, in a empty directory without history, with branch: OK"
+    case2=$(($cloning_result+$history_result+$branch_result))
+    if [ $case2 = 0 ]; then
+        echo "case 2, in a empty directory without history, with branch: OK"
     else
-        echo "case 1, in a empty directory without history, with branch: FAIL"
+        echo "case 2, in a empty directory without history, with branch: FAIL"
     fi
 }
 
+test3(){
+#CASE 3: git cloned in an existing directory
+    section TEST3
+    #if it exists, delete the directory
+    if [ -d $REPO_NAME ]; then
+        run rm -rf $REPO_NAME
+    fi
+    #mimic an existing directory, with two existing file, one with the same name as a to-be-cloned file
+    run mkdir tmp_dir
+    run cd tmp_dir
+    run touch tmp_file
+    run touch "${FILENAMES[0]}"
+    echo "this should be overwritten" > ${FILENAMES[0]}
+    run ../git_update.sh -N $REMOTE
+    run cd ..
+    #checks
+    cloning_check "tmp_dir" ${FILENAMES[@]}
+    history_check $"tmp_dir"
+
+    #existing check
+    cd tmp_dir
+    if [ -f tmp_file ]; then
+        echo "The preexisting non-conflicting file is still here."
+        existing_result=0
+        if [ $(grep "overwritten" ${FILENAMES[0]} | wc -l) = 0 ]; then
+            echo "The conflicting files have been overwitten."
+        else
+            echo "The conflicting existing files have not been overwritten."
+            existing_result=1
+        fi
+    else
+        echo "The preexisting non-conflicting file has been deleted."
+        existing_result=1
+    fi
+    cd ..
+    case3=$(($cloning_result+$history_result+$existing_result))
+    if [ $case3 = 0 ]; then
+        echo "case 3, in a non-empty directory without history: OK"
+    else
+        echo "case 3, in a non-empty directory without history: FAIL"
+    fi
+
+}
+
 
 while getopts ":hn:a" option; do
    case $option in