diff --git a/config.template.yml b/config.template.yml
index 846f7a8c..83f1fed7 100644
--- a/config.template.yml
+++ b/config.template.yml
@@ -55,8 +55,10 @@ ldap:
 #
 # Note: by default a domain uses "two_factor" method.
 #
-# Note: 'overriden_methods' is a dictionary where keys must be subdomains and 
+# Note: 'per_subdomain_methods' is a dictionary where keys must be subdomains and
 # values must be one of the two possible methods.
+#
+# Note: 'per_subdomain_methods' is optional.
 authentication_methods:
   default_method: two_factor
   per_subdomain_methods:
diff --git a/config.test.yml b/config.test.yml
index d2a9b7a4..ca70f527 100644
--- a/config.test.yml
+++ b/config.test.yml
@@ -47,6 +47,21 @@ ldap:
   user: cn=admin,dc=example,dc=com
   password: password
 
+# Authentication methods
+#
+# Authentication methods can be defined per subdomain.
+# There are currently two available methods: "basic_auth" and "two_factor"
+#
+# Note: by default a domain uses "two_factor" method.
+#
+# Note: 'per_subdomain_methods' is a dictionary where keys must be subdomains and
+# values must be one of the two possible methods.
+#
+# Note: 'per_subdomain_methods' is optional.
+authentication_methods:
+  default_method: two_factor
+  per_subdomain_methods:
+    basicauth.test.local: basic_auth
 
 # Access Control
 #
diff --git a/server/src/lib/configuration/Configuration.d.ts b/server/src/lib/configuration/Configuration.d.ts
index 802572b2..3b6b0c2a 100644
--- a/server/src/lib/configuration/Configuration.d.ts
+++ b/server/src/lib/configuration/Configuration.d.ts
@@ -116,7 +116,7 @@ declare type AuthenticationMethodPerSubdomain = { [subdomain: string]: Authentic
 
 export interface AuthenticationMethodsConfiguration {
     default_method: AuthenticationMethod;
-    per_subdomain_methods: AuthenticationMethodPerSubdomain;
+    per_subdomain_methods?: AuthenticationMethodPerSubdomain;
 }
 
 export interface UserConfiguration {