fix test

Author: tomirons

tests/Feature/ExportPostmanTest.php

@@ -228,7 +228,7 @@ public function test_rules_printing_export_to_human_readable_works()
          **/
         $this->assertCount(1, $fields->where('key', 'field_6')->where('description', 'The selected field 6 is invalid.'));
         $this->assertCount(1, $fields->where('key', 'field_7')->where('description', 'The field 7 field is required.'));
-        $this->assertCount(1, $fields->where('key', 'field_8')->where('description', 'validation.'));
+        $this->assertCount(1, $fields->where('key', 'field_8')->where('description', 'The field 8 field must be uppercase.'));
         $this->assertCount(1, $fields->where('key', 'field_9')->where('description', 'The field 9 field is required., The field 9 field must be a string.'));
     }