diff --git a/lib/tests_coordination.sh b/lib/tests_coordination.sh
index 4e90f56..8b391cb 100644
--- a/lib/tests_coordination.sh
+++ b/lib/tests_coordination.sh
@@ -1,8 +1,8 @@
 #!/bin/bash
 
-source lib/lxc.sh
+source lib/ynh_lxd
+source lib/ynh_lxd_package_check
 source lib/tests.sh
-source lib/witness.sh
 
 readonly complete_log="./Complete-${WORKER_ID}.log"
 
diff --git a/lib/witness.sh b/lib/witness.sh
deleted file mode 100644
index ea31590..0000000
--- a/lib/witness.sh
+++ /dev/null
@@ -1,90 +0,0 @@
-
-set_witness_files () {
-    # Create files to check if the remove script does not remove them accidentally
-    log_debug "Create witness files..."
-
-    create_witness_file () {
-        [ "$2" = "file" ] && local action="touch" || local action="mkdir -p"
-        RUN_INSIDE_LXC $action $1
-    }
-
-    # Nginx conf
-    create_witness_file "/etc/nginx/conf.d/$DOMAIN.d/witnessfile.conf" file
-    create_witness_file "/etc/nginx/conf.d/$SUBDOMAIN.d/witnessfile.conf" file
-
-    # /etc
-    create_witness_file "/etc/witnessfile" file
-
-    # /opt directory
-    create_witness_file "/opt/witnessdir" directory
-
-    # /var/www directory
-    create_witness_file "/var/www/witnessdir" directory
-
-    # /home/yunohost.app/
-    create_witness_file "/home/yunohost.app/witnessdir" directory
-
-    # /var/log
-    create_witness_file "/var/log/witnessfile" file
-
-    # Config fpm
-    create_witness_file "/etc/php/$DEFAULT_PHP_VERSION/fpm/pool.d/witnessfile.conf" file
-
-    # Config logrotate
-    create_witness_file "/etc/logrotate.d/witnessfile" file
-
-    # Config systemd
-    create_witness_file "/etc/systemd/system/witnessfile.service" file
-
-    # Database
-    RUN_INSIDE_LXC mysqladmin --wait status > /dev/null 2>&1
-    echo "CREATE DATABASE witnessdb" | RUN_INSIDE_LXC mysql --wait > /dev/null 2>&1
-}
-
-check_witness_files () {
-    # Check all the witness files, to verify if them still here
-
-    check_file_exist () {
-        if RUN_INSIDE_LXC test ! -e "$1"
-        then
-            log_error "The file $1 is missing ! Something gone wrong !"
-            SET_RESULT "failure" witness
-        fi
-    }
-
-    # Nginx conf
-    check_file_exist "/etc/nginx/conf.d/$DOMAIN.d/witnessfile.conf"
-    check_file_exist "/etc/nginx/conf.d/$SUBDOMAIN.d/witnessfile.conf"
-
-    # /etc
-    check_file_exist "/etc/witnessfile"
-
-    # /opt directory
-    check_file_exist "/opt/witnessdir"
-
-    # /var/www directory
-    check_file_exist "/var/www/witnessdir"
-
-    # /home/yunohost.app/
-    check_file_exist "/home/yunohost.app/witnessdir"
-
-    # /var/log
-    check_file_exist "/var/log/witnessfile"
-
-    # Config fpm
-    check_file_exist "/etc/php/$DEFAULT_PHP_VERSION/fpm/pool.d/witnessfile.conf"
-
-    # Config logrotate
-    check_file_exist "/etc/logrotate.d/witnessfile"
-
-    # Config systemd
-    check_file_exist "/etc/systemd/system/witnessfile.service"
-
-    # Database
-    if ! RUN_INSIDE_LXC mysqlshow witnessdb > /dev/null 2>&1
-    then
-        log_error "The database witnessdb is missing ! Something gone wrong !"
-        SET_RESULT "failure" witness
-        return 1
-    fi
-}
diff --git a/lib/ynh_lxd b/lib/ynh_lxd
new file mode 100644
index 0000000..6f59efb
--- /dev/null
+++ b/lib/ynh_lxd
@@ -0,0 +1,6 @@
+#!/bin/bash
+
+#=================================================
+# LXD HELPERS
+#=================================================
+
diff --git a/lib/lxc.sh b/lib/ynh_lxd_package_check
similarity index 69%
rename from lib/lxc.sh
rename to lib/ynh_lxd_package_check
index f52ab43..a1f16c4 100644
--- a/lib/lxc.sh
+++ b/lib/ynh_lxd_package_check
@@ -1,7 +1,7 @@
 #!/bin/bash
 
 #=================================================
-# RUNNING SNAPSHOT
+# PACKAGE_CHECK HELPERS
 #=================================================
 
 LXC_CREATE () {
@@ -221,3 +221,92 @@ RUN_INSIDE_LXC() {
     lxc exec $LXC_NAME -- "$@"
 }
 
+set_witness_files () {
+    # Create files to check if the remove script does not remove them accidentally
+    log_debug "Create witness files..."
+
+    create_witness_file () {
+        [ "$2" = "file" ] && local action="touch" || local action="mkdir -p"
+        RUN_INSIDE_LXC $action $1
+    }
+
+    # Nginx conf
+    create_witness_file "/etc/nginx/conf.d/$DOMAIN.d/witnessfile.conf" file
+    create_witness_file "/etc/nginx/conf.d/$SUBDOMAIN.d/witnessfile.conf" file
+
+    # /etc
+    create_witness_file "/etc/witnessfile" file
+
+    # /opt directory
+    create_witness_file "/opt/witnessdir" directory
+
+    # /var/www directory
+    create_witness_file "/var/www/witnessdir" directory
+
+    # /home/yunohost.app/
+    create_witness_file "/home/yunohost.app/witnessdir" directory
+
+    # /var/log
+    create_witness_file "/var/log/witnessfile" file
+
+    # Config fpm
+    create_witness_file "/etc/php/$DEFAULT_PHP_VERSION/fpm/pool.d/witnessfile.conf" file
+
+    # Config logrotate
+    create_witness_file "/etc/logrotate.d/witnessfile" file
+
+    # Config systemd
+    create_witness_file "/etc/systemd/system/witnessfile.service" file
+
+    # Database
+    RUN_INSIDE_LXC mysqladmin --wait status > /dev/null 2>&1
+    echo "CREATE DATABASE witnessdb" | RUN_INSIDE_LXC mysql --wait > /dev/null 2>&1
+}
+
+check_witness_files () {
+    # Check all the witness files, to verify if them still here
+
+    check_file_exist () {
+        if RUN_INSIDE_LXC test ! -e "$1"
+        then
+            log_error "The file $1 is missing ! Something gone wrong !"
+            SET_RESULT "failure" witness
+        fi
+    }
+
+    # Nginx conf
+    check_file_exist "/etc/nginx/conf.d/$DOMAIN.d/witnessfile.conf"
+    check_file_exist "/etc/nginx/conf.d/$SUBDOMAIN.d/witnessfile.conf"
+
+    # /etc
+    check_file_exist "/etc/witnessfile"
+
+    # /opt directory
+    check_file_exist "/opt/witnessdir"
+
+    # /var/www directory
+    check_file_exist "/var/www/witnessdir"
+
+    # /home/yunohost.app/
+    check_file_exist "/home/yunohost.app/witnessdir"
+
+    # /var/log
+    check_file_exist "/var/log/witnessfile"
+
+    # Config fpm
+    check_file_exist "/etc/php/$DEFAULT_PHP_VERSION/fpm/pool.d/witnessfile.conf"
+
+    # Config logrotate
+    check_file_exist "/etc/logrotate.d/witnessfile"
+
+    # Config systemd
+    check_file_exist "/etc/systemd/system/witnessfile.service"
+
+    # Database
+    if ! RUN_INSIDE_LXC mysqlshow witnessdb > /dev/null 2>&1
+    then
+        log_error "The database witnessdb is missing ! Something gone wrong !"
+        SET_RESULT "failure" witness
+        return 1
+    fi
+}