diff --git a/src/ORM/DatabaseAdmin.php b/src/ORM/DatabaseAdmin.php
index 2898a72e899..788740ea62c 100644
--- a/src/ORM/DatabaseAdmin.php
+++ b/src/ORM/DatabaseAdmin.php
@@ -293,7 +293,7 @@ public function doBuild($quiet = false, $populate = true, $testMode = false)
                 }
 
                 // Check if this class should be excluded as per testing conventions
-                $SNG = singleton($dataClass);
+                $SNG = $dataClass();
                 if (!$testMode && $SNG instanceof TestOnly) {
                     continue;
                 }