diff --git a/tests.toml b/tests.toml
index 48ddfd4..fcab393 100644
--- a/tests.toml
+++ b/tests.toml
@@ -50,3 +50,12 @@ test_format = 1.0
 
     only = ["install.subdir", "backup_restore", "upgrade" ]
     args.database = "postgresql"
+
+[custom_error_file_test]
+    only = ["install.subdir", "backup_restore", "upgrade" ]
+    args.custom_error_file = "1"
+    test_upgrade_from.bf5d3ed.name = "1.0~ynh14"
+    test_upgrade_from.bf5d3ed.args.with_mysql = "0"
+    test_upgrade_from.bf5d3ed.args.domain = "sub.domain.tld"
+    test_upgrade_from.bf5d3ed.args.path = "/"
+    test_upgrade_from.bf5d3ed.args.password = "SuperDuper_StrongPassw0rd"