diff --git a/searx/results.py b/searx/results.py
index 5e1b46ed5..1ac6a5ab5 100644
--- a/searx/results.py
+++ b/searx/results.py
@@ -2,7 +2,7 @@ import re
 from collections import defaultdict
 from operator import itemgetter
 from threading import RLock
-from typing import List, NamedTuple
+from typing import List, NamedTuple, Set
 from urllib.parse import urlparse, unquote
 
 from searx import logger
@@ -145,6 +145,12 @@ class Timing(NamedTuple):
     load: float
 
 
+class UnresponsiveEngine(NamedTuple):
+    engine: str
+    error_type: str
+    suspended: bool
+
+
 class ResultContainer:
     """docstring for ResultContainer"""
 
@@ -176,7 +182,7 @@ class ResultContainer:
         self.engine_data = defaultdict(dict)
         self._closed = False
         self.paging = False
-        self.unresponsive_engines = set()
+        self.unresponsive_engines: Set[UnresponsiveEngine] = set()
         self.timings: List[Timing] = []
         self.redirect_url = None
         self.on_result = lambda _: True
@@ -409,9 +415,9 @@ class ResultContainer:
             return 0
         return resultnum_sum / len(self._number_of_results)
 
-    def add_unresponsive_engine(self, engine_name, error_type, suspended=False):
+    def add_unresponsive_engine(self, engine_name: str, error_type: str, suspended: bool = False):
         if engines[engine_name].display_error_messages:
-            self.unresponsive_engines.add((engine_name, error_type, suspended))
+            self.unresponsive_engines.add(UnresponsiveEngine(engine_name, error_type, suspended))
 
     def add_timing(self, engine_name: str, engine_time: float, page_load_time: float):
         self.timings.append(Timing(engine_name, total=engine_time, load=page_load_time))
diff --git a/searx/webapp.py b/searx/webapp.py
index bb6e74b25..196bfb0d2 100755
--- a/searx/webapp.py
+++ b/searx/webapp.py
@@ -15,7 +15,7 @@ from timeit import default_timer
 from html import escape
 from io import StringIO
 import typing
-from typing import List, Dict
+from typing import List, Dict, Iterable
 
 import urllib
 from urllib.parse import urlencode
@@ -56,7 +56,7 @@ from searx import (
     searx_debug,
 )
 from searx.data import ENGINE_DESCRIPTIONS
-from searx.results import Timing
+from searx.results import Timing, UnresponsiveEngine
 from searx.settings_defaults import OUTPUT_FORMATS
 from searx.settings_loader import get_default_settings_path
 from searx.exceptions import SearxParameterException
@@ -844,21 +844,21 @@ def search():
     )
 
 
-def __get_translated_errors(unresponsive_engines):
+def __get_translated_errors(unresponsive_engines: Iterable[UnresponsiveEngine]):
     translated_errors = []
 
     # make a copy unresponsive_engines to avoid "RuntimeError: Set changed size
     # during iteration" it happens when an engine modifies the ResultContainer
     # after the search_multiple_requests method has stopped waiting
 
-    for unresponsive_engine in list(unresponsive_engines):
-        error_user_text = exception_classname_to_text.get(unresponsive_engine[1])
+    for unresponsive_engine in unresponsive_engines:
+        error_user_text = exception_classname_to_text.get(unresponsive_engine.error_type)
         if not error_user_text:
             error_user_text = exception_classname_to_text[None]
         error_msg = gettext(error_user_text)
-        if unresponsive_engine[2]:
+        if unresponsive_engine.suspended:
             error_msg = gettext('Suspended') + ': ' + error_msg
-        translated_errors.append((unresponsive_engine[0], error_msg))
+        translated_errors.append((unresponsive_engine.engine, error_msg))
 
     return sorted(translated_errors, key=lambda e: e[0])