Add --loglevel trace:info to standard command args

@@ -13,5 +13,7 @@ def runner():
         if not os.path.exists(directory):
             os.mkdir(directory)
         args += ['-d', directory]
+    if '-L' not in args and '--loglevel' not in args:
+        args += ['--loglevel', 'trace:info']
     args.append(os.path.join(os.path.dirname(__file__), 'tests_files'))
     return run_cli(args)