diff --git a/scrapy/utils/test.py b/scrapy/utils/test.py
index b4e20c3c6..90ed70262 100644
--- a/scrapy/utils/test.py
+++ b/scrapy/utils/test.py
@@ -69,6 +69,7 @@ def get_crawler(
     # When needed, useful settings can be added here, e.g. ones that prevent
     # deprecation warnings.
     settings: dict[str, Any] = {
+        "TELNETCONSOLE_ENABLED": False,
         **get_reactor_settings(),
         **(settings_dict or {}),
     }
diff --git a/tests/test_extension_telnet.py b/tests/test_extension_telnet.py
index 3f9135867..b2a2f4f54 100644
--- a/tests/test_extension_telnet.py
+++ b/tests/test_extension_telnet.py
@@ -1,61 +1,82 @@
+from __future__ import annotations
+
+from typing import TYPE_CHECKING, Any
+
 import pytest
 from twisted.conch.telnet import ITelnetProtocol
 from twisted.cred import credentials
 
 from scrapy.extensions.telnet import TelnetConsole
+from scrapy.utils.defer import maybe_deferred_to_future
 from scrapy.utils.test import get_crawler
-from tests.utils.decorators import inline_callbacks_test
+from tests.utils.decorators import coroutine_test
+
+if TYPE_CHECKING:
+    from scrapy.crawler import Crawler
 
 pytestmark = pytest.mark.requires_reactor  # TelnetConsole requires a reactor
 
 
-class TestTelnetExtension:
-    def _get_console_and_portal(self, settings=None):
-        crawler = get_crawler(settings_dict=settings)
-        console = TelnetConsole(crawler)
+def _get_crawler(settings_dict: dict[str, Any] | None = None) -> Crawler:
+    settings = {
+        "TELNETCONSOLE_ENABLED": True,
+        **(settings_dict or {}),
+    }
+    return get_crawler(settings_dict=settings)
 
-        # This function has some side effects we don't need for this test
-        console._get_telnet_vars = dict
 
+def _get_console_and_portal(
+    settings: dict[str, Any] | None = None,
+) -> tuple[TelnetConsole, Any]:
+    crawler = _get_crawler(settings_dict=settings)
+    console = TelnetConsole(crawler)
+
+    # This function has some side effects we don't need for this test
+    console._get_telnet_vars = dict
+
+    console.start_listening()
+    protocol = console.protocol()
+    portal = protocol.protocolArgs[0]
+
+    return console, portal
+
+
+@coroutine_test
+async def test_bad_credentials() -> None:
+    console, portal = _get_console_and_portal()
+    creds = credentials.UsernamePassword(b"username", b"password")
+    d = portal.login(creds, None, ITelnetProtocol)
+    with pytest.raises(ValueError, match="Invalid credentials"):
+        await maybe_deferred_to_future(d)
+    console.stop_listening()
+
+
+@coroutine_test
+async def test_good_credentials() -> None:
+    console, portal = _get_console_and_portal()
+    creds = credentials.UsernamePassword(
+        console.username.encode("utf8"), console.password.encode("utf8")
+    )
+    d = portal.login(creds, None, ITelnetProtocol)
+    await maybe_deferred_to_future(d)
+    console.stop_listening()
+
+
+@coroutine_test
+async def test_custom_credentials() -> None:
+    settings = {
+        "TELNETCONSOLE_USERNAME": "user",
+        "TELNETCONSOLE_PASSWORD": "pass",
+    }
+    console, portal = _get_console_and_portal(settings=settings)
+    creds = credentials.UsernamePassword(b"user", b"pass")
+    d = portal.login(creds, None, ITelnetProtocol)
+    await maybe_deferred_to_future(d)
+    console.stop_listening()
+
+
+def test_invalid_reversed_portrange() -> None:
+    settings = {"TELNETCONSOLE_PORT": [2, 1]}
+    console = TelnetConsole(_get_crawler(settings_dict=settings))
+    with pytest.raises(ValueError, match=r"invalid portrange: \[2, 1\]"):
         console.start_listening()
-        protocol = console.protocol()
-        portal = protocol.protocolArgs[0]
-
-        return console, portal
-
-    @inline_callbacks_test
-    def test_bad_credentials(self):
-        console, portal = self._get_console_and_portal()
-        creds = credentials.UsernamePassword(b"username", b"password")
-        d = portal.login(creds, None, ITelnetProtocol)
-        with pytest.raises(ValueError, match="Invalid credentials"):
-            yield d
-        console.stop_listening()
-
-    @inline_callbacks_test
-    def test_good_credentials(self):
-        console, portal = self._get_console_and_portal()
-        creds = credentials.UsernamePassword(
-            console.username.encode("utf8"), console.password.encode("utf8")
-        )
-        d = portal.login(creds, None, ITelnetProtocol)
-        yield d
-        console.stop_listening()
-
-    @inline_callbacks_test
-    def test_custom_credentials(self):
-        settings = {
-            "TELNETCONSOLE_USERNAME": "user",
-            "TELNETCONSOLE_PASSWORD": "pass",
-        }
-        console, portal = self._get_console_and_portal(settings=settings)
-        creds = credentials.UsernamePassword(b"user", b"pass")
-        d = portal.login(creds, None, ITelnetProtocol)
-        yield d
-        console.stop_listening()
-
-    def test_invalid_reversed_portrange(self):
-        settings = {"TELNETCONSOLE_PORT": [2, 1]}
-        console = TelnetConsole(get_crawler(settings_dict=settings))
-        with pytest.raises(ValueError, match=r"invalid portrange: \[2, 1\]"):
-            console.start_listening()