diff --git a/scrapy/extensions/debug.py b/scrapy/extensions/debug.py
index d3c225bcd..6948c394c 100644
--- a/scrapy/extensions/debug.py
+++ b/scrapy/extensions/debug.py
@@ -33,8 +33,8 @@ class StackTraceDump:
     def __init__(self, crawler: Crawler):
         self.crawler: Crawler = crawler
         try:
-            signal.signal(signal.SIGUSR2, self.dump_stacktrace)
-            signal.signal(signal.SIGQUIT, self.dump_stacktrace)
+            signal.signal(signal.SIGUSR2, self.dump_stacktrace)  # type: ignore[attr-defined]
+            signal.signal(signal.SIGQUIT, self.dump_stacktrace)  # type: ignore[attr-defined]
         except AttributeError:
             # win32 platforms don't support SIGUSR signals
             pass
@@ -70,7 +70,7 @@ class StackTraceDump:
 class Debugger:
     def __init__(self) -> None:
         try:
-            signal.signal(signal.SIGUSR2, self._enter_debugger)
+            signal.signal(signal.SIGUSR2, self._enter_debugger)  # type: ignore[attr-defined]
         except AttributeError:
             # win32 platforms don't support SIGUSR signals
             pass
diff --git a/scrapy/utils/console.py b/scrapy/utils/console.py
index aecd3fdb7..6b9b4114f 100644
--- a/scrapy/utils/console.py
+++ b/scrapy/utils/console.py
@@ -82,7 +82,7 @@ def _embed_standard_shell(
     else:
         import rlcompleter  # noqa: F401
 
-        readline.parse_and_bind("tab:complete")
+        readline.parse_and_bind("tab:complete")  # type: ignore[attr-defined]
 
     @wraps(_embed_standard_shell)
     def wrapper(namespace: dict[str, Any] = namespace, banner: str = "") -> None: