diff --git a/DataStorage/Database/Query/Builder.php b/DataStorage/Database/Query/Builder.php
index d03bf9869..119334759 100644
--- a/DataStorage/Database/Query/Builder.php
+++ b/DataStorage/Database/Query/Builder.php
@@ -523,25 +523,6 @@ class Builder extends BuilderAbstract
         return $this->wheres[self::getPublicColumnName($column)] ?? null;
     }
 
-    /**
-     * Get table name of system
-     *
-     * @param mixed  $expression       System expression
-     * @param string $systemIdentifier System identifier
-     *
-     * @return string|null
-     *
-     * @since  1.0.0
-     */
-    public function getTableOfSystem($expression, string $systemIdentifier) : ?string
-    {
-        if (($pos = \strpos($expression, $systemIdentifier . '.' . $systemIdentifier)) === false) {
-            return null;
-        }
-
-        return \explode('.', $expression)[0];
-    }
-
     /**
      * Where and sub condition.
      *
diff --git a/tests/Bootstrap.php b/tests/Bootstrap.php
index c945270b9..2ec79c72d 100644
--- a/tests/Bootstrap.php
+++ b/tests/Bootstrap.php
@@ -1,6 +1,9 @@
 <?php
 
 ini_set('memory_limit', '2048M');
+ini_set('display_errors', 1);
+ini_set('display_startup_errors', 1);
+error_reporting(E_ALL);
 
 if (\file_exists('vendor/autoload.php')) {
     include_once 'vendor/autoload.php';