diff --git a/yt_dlp/extractor/bokecc.py b/yt_dlp/extractor/bokecc.py
index 5fe937a6ac..42047aced1 100644
--- a/yt_dlp/extractor/bokecc.py
+++ b/yt_dlp/extractor/bokecc.py
@@ -24,7 +24,7 @@ class BokeCCBaseIE(InfoExtractor):
 
 
 class BokeCCIE(BokeCCBaseIE):
-    _IE_DESC = 'CC视频'
+    IE_DESC = 'CC视频'
     _VALID_URL = r'https?://union\.bokecc\.com/playvideo\.bo\?(?P<query>.*)'
 
     _TESTS = [{
diff --git a/yt_dlp/extractor/moviepilot.py b/yt_dlp/extractor/moviepilot.py
index ed5be4fa65..3b20232263 100644
--- a/yt_dlp/extractor/moviepilot.py
+++ b/yt_dlp/extractor/moviepilot.py
@@ -3,8 +3,8 @@ from .dailymotion import DailymotionIE
 
 
 class MoviepilotIE(InfoExtractor):
-    _IE_NAME = 'moviepilot'
-    _IE_DESC = 'Moviepilot trailer'
+    IE_NAME = 'moviepilot'
+    IE_DESC = 'Moviepilot trailer'
     _VALID_URL = r'https?://(?:www\.)?moviepilot\.de/movies/(?P<id>[^/]+)'
 
     _TESTS = [{
diff --git a/yt_dlp/extractor/senategov.py b/yt_dlp/extractor/senategov.py
index efcdb79d0c..dc275e58da 100644
--- a/yt_dlp/extractor/senategov.py
+++ b/yt_dlp/extractor/senategov.py
@@ -13,7 +13,7 @@ from ..utils.traversal import traverse_obj
 
 
 class SenateISVPIE(InfoExtractor):
-    _IE_NAME = 'senate.gov:isvp'
+    IE_NAME = 'senate.gov:isvp'
     _VALID_URL = r'https?://(?:www\.)?senate\.gov/isvp/?\?(?P<qs>.+)'
     _EMBED_REGEX = [r"<iframe[^>]+src=['\"](?P<url>https?://www\.senate\.gov/isvp/?\?[^'\"]+)['\"]"]
 
@@ -137,7 +137,7 @@ class SenateISVPIE(InfoExtractor):
 
 
 class SenateGovIE(InfoExtractor):
-    _IE_NAME = 'senate.gov'
+    IE_NAME = 'senate.gov'
     _SUBDOMAIN_RE = '|'.join(map(re.escape, (
         'agriculture', 'aging', 'appropriations', 'armed-services', 'banking',
         'budget', 'commerce', 'energy', 'epw', 'finance', 'foreign', 'help',