diff --git a/installation/includes/02_helpers.sh b/installation/includes/02_helpers.sh
index 39dcd6619..74d7595d4 100644
--- a/installation/includes/02_helpers.sh
+++ b/installation/includes/02_helpers.sh
@@ -59,8 +59,8 @@ check_os_type() {
 
 ##### Check helpers
 
-# Check if the file(s) exist
-verify_files_exist() {
+# Check if the file(s) exists
+verify_files_exists() {
     local files="$@"
     echo "Verify '${files}' exists"
 
@@ -71,8 +71,8 @@ verify_files_exist() {
     echo "CHECK"
 }
 
-# Check if the dir(s) exist
-verify_dirs_exist() {
+# Check if the dir(s) exists
+verify_dirs_exists() {
     local dirs="$@"
     echo "Verify '${dirs}' exists"
 
diff --git a/installation/routines/setup_jukebox_core.sh b/installation/routines/setup_jukebox_core.sh
index ca538fb38..dfbed6b64 100644
--- a/installation/routines/setup_jukebox_core.sh
+++ b/installation/routines/setup_jukebox_core.sh
@@ -146,7 +146,7 @@ _jukebox_core_check () {
         libasound2-dev \
         rsync
 
-    verify_dirs_exist "${VIRTUAL_ENV}"
+    verify_dirs_exists "${VIRTUAL_ENV}"
 
     local pip_modules=$(get_args_from_file "${INSTALLATION_PATH}/requirements.txt")
     verify_pip_modules pyzmq $pip_modules
diff --git a/installation/routines/setup_jukebox_webapp.sh b/installation/routines/setup_jukebox_webapp.sh
index cb7d0058a..d42dca916 100644
--- a/installation/routines/setup_jukebox_webapp.sh
+++ b/installation/routines/setup_jukebox_webapp.sh
@@ -82,14 +82,14 @@ _jukebox_webapp_check () {
     echo "Check WebApp Installation" | tee /dev/fd/3
 
     if [[ $ENABLE_WEBAPP_PROD_DOWNLOAD == true || $ENABLE_WEBAPP_PROD_DOWNLOAD == release-only ]] ; then
-        verify_dirs_exist "${INSTALLATION_PATH}/src/webapp/build"
+        verify_dirs_exists "${INSTALLATION_PATH}/src/webapp/build"
     fi
     if [[ $ENABLE_INSTALL_NODE == true ]] ; then
         verify_apt_packages nodejs
     fi
 
     verify_apt_packages nginx
-    verify_files_exist "${WEBAPP_NGINX_SITE_DEFAULT_CONF}"
+    verify_files_exists "${WEBAPP_NGINX_SITE_DEFAULT_CONF}"
 
     check_service_enablement nginx.service enabled
 }
diff --git a/installation/routines/setup_kiosk_mode.sh b/installation/routines/setup_kiosk_mode.sh
index 576cbc75a..7864e020a 100644
--- a/installation/routines/setup_kiosk_mode.sh
+++ b/installation/routines/setup_kiosk_mode.sh
@@ -68,13 +68,13 @@ _kiosk_mode_check () {
         openbox \
         chromium-browser
 
-    verify_files_exist "${KIOSK_MODE_BASHRC}"
+    verify_files_exists "${KIOSK_MODE_BASHRC}"
     verify_file_contains_string "${KIOSK_MODE_CONF_HEADER}" "${KIOSK_MODE_BASHRC}"
 
-    verify_files_exist "${KIOSK_MODE_XINITRC}"
+    verify_files_exists "${KIOSK_MODE_XINITRC}"
     verify_file_contains_string "${KIOSK_MODE_CONF_HEADER}" "${KIOSK_MODE_XINITRC}"
 
-    verify_files_exist "${KIOSK_MODE_CHROMIUM_CUSTOM_DISABLE_UPDATE_CHECK}"
+    verify_files_exists "${KIOSK_MODE_CHROMIUM_CUSTOM_DISABLE_UPDATE_CHECK}"
     verify_file_contains_string "${KIOSK_MODE_CONF_HEADER}" "${KIOSK_MODE_CHROMIUM_CUSTOM_DISABLE_UPDATE_CHECK}"
 }