MAGETWO-88409: Builds stabilization for PR

- units

Author: rganin

lib/internal/Magento/Framework/Setup/Test/Unit/Declaration/Schema/Db/SchemaBuilderTest.php

@@ -289,6 +289,7 @@ public function testBuild(array $columns, array $references, array $constraints,
      * @param array $references
      * @param array $constraints
      * @param array $indexes
+     * @expectedException \Exception
      * @expectedExceptionMessage
      * User Warning: Column unknown_column does not exist for index/constraint FIRST_INDEX in table second_table
      */