diff --git a/composables/helpers.ts b/composables/helpers.ts
index f55af06e..85141b42 100644
--- a/composables/helpers.ts
+++ b/composables/helpers.ts
@@ -5,10 +5,11 @@ export function isTrackerOpen (): boolean {
   const settings = useSettings();
 
   // todo: we are not using the type TrackerMode in
-  // settings.value.tracker_mode
+  // settings.value.tracker_mode.
+  // Depends on: https://github.com/torrust/torrust-index-types-lib/issues/18
 
-  return settings.value.tracker_mode === "Public" ||
-        settings.value.tracker_mode === "Whitelisted";
+  return settings.value.tracker_mode === "public" ||
+        settings.value.tracker_mode === "listed";
 }
 
 export function isTrackerClose (): boolean {
diff --git a/share/default/config/index.private.e2e.container.sqlite3.toml b/share/default/config/index.private.e2e.container.sqlite3.toml
index 81d368fb..30ff0dd5 100644
--- a/share/default/config/index.private.e2e.container.sqlite3.toml
+++ b/share/default/config/index.private.e2e.container.sqlite3.toml
@@ -1,11 +1,11 @@
 [tracker]
-url = "http://tracker:7070"
-mode = "Private"
 api_url = "http://tracker:1212"
+mode = "private"
+url = "http://tracker:7070"
 
 [database]
 connect_url = "sqlite:///var/lib/torrust/index/database/e2e_testing_sqlite3.db?mode=rwc"
 
-[mail]
-server = "mailcatcher"
+[mail.smtp]
 port = 1025
+server = "mailcatcher"
diff --git a/share/default/config/index.public.e2e.container.sqlite3.toml b/share/default/config/index.public.e2e.container.sqlite3.toml
index f4c93098..73b7aad3 100644
--- a/share/default/config/index.public.e2e.container.sqlite3.toml
+++ b/share/default/config/index.public.e2e.container.sqlite3.toml
@@ -1,10 +1,10 @@
 [tracker]
-url = "udp://tracker:6969"
 api_url = "http://tracker:1212"
+url = "udp://tracker:6969"
 
 [database]
 connect_url = "sqlite:///var/lib/torrust/index/database/e2e_testing_sqlite3.db?mode=rwc"
 
 [mail]
-server = "mailcatcher"
 port = 1025
+server = "mailcatcher"