diff --git a/core/includes/install.core.inc b/core/includes/install.core.inc
index 3999741..6d4da71 100644
--- a/core/includes/install.core.inc
+++ b/core/includes/install.core.inc
@@ -373,20 +373,12 @@ function install_begin_request($class_loader, &$install_state) {
       ->addArgument(new Reference('config.factory'));
   }
 
+  // $install_state['base_system_verified'] defaults to FALSE, so the code
+  // following below will use the minimal installer service container.
+  // As soon as the base system is verified here, the installer operates in
+  // a full and regular Drupal environment, without any kind of exceptions.
   if ($install_state['settings_verified']) {
-    try {
-      $system_schema = system_schema();
-      end($system_schema);
-      $table = key($system_schema);
-      $install_state['base_system_verified'] = Database::getConnection()->schema()->tableExists($table);
-    }
-    catch (DatabaseExceptionWrapper $e) {
-      // The last defined table of the base system_schema() does not exist yet.
-      // $install_state['base_system_verified'] defaults to FALSE, so the code
-      // following below will use the minimal installer service container.
-      // As soon as the base system is verified here, the installer operates in
-      // a full and regular Drupal environment, without any kind of exceptions.
-    }
+    $install_state['base_system_verified'] = drupal_is_installed();
   }
 
   // Replace services with in-memory and null implementations. This kernel is