diff --git a/src/caosdb/schema-pycaosdb-ini.yml b/src/caosdb/schema-pycaosdb-ini.yml
index 5dabdd89795e19a757209e03cc843776be705777..a81bf006523ab7690ee0bf9d27e0a2d57ce8c3c3 100644
--- a/src/caosdb/schema-pycaosdb-ini.yml
+++ b/src/caosdb/schema-pycaosdb-ini.yml
@@ -26,7 +26,7 @@ schema-pycaosdb-ini:
           description: The password input method defines how the password is supplied that is used for authentication with the server.
           type: string
           default: input
-          enum: [input, plain, pass, keyring]
+          enum: [input, unauthenticated, plain, pass, keyring]
         password_identifier:
           type: string
         password:
diff --git a/unittests/test_configs/pycaosdb6.ini b/unittests/test_configs/pycaosdb6.ini
new file mode 100644
index 0000000000000000000000000000000000000000..3826564f043c5702385a3d093cb4ebb8d4c24cd2
--- /dev/null
+++ b/unittests/test_configs/pycaosdb6.ini
@@ -0,0 +1,4 @@
+[Connection]
+url=https://localhost:10443/
+# No username, unauthenticated connection
+password_method = unauthenticated