diff --git a/test/test_youtube_lists.py b/test/test_youtube_lists.py
index 3722ff5ba..78657b51c 100644
--- a/test/test_youtube_lists.py
+++ b/test/test_youtube_lists.py
@@ -29,7 +29,7 @@ class FakeDownloader(FileDownloader):
         self.params = parameters
     def to_screen(self, s):
         print(s)
-    def trouble(self, s):
+    def trouble(self, s, tb=None):
         raise Exception(s)
     def extract_info(self, url):
         self.result.append(url)
diff --git a/test/test_youtube_subtitles.py b/test/test_youtube_subtitles.py
index b4909091b..5b3f289af 100644
--- a/test/test_youtube_subtitles.py
+++ b/test/test_youtube_subtitles.py
@@ -30,7 +30,7 @@ class FakeDownloader(object):
         self.params = parameters
     def to_screen(self, s):
         print(s)
-    def trouble(self, s):
+    def trouble(self, s, tb=None):
         raise Exception(s)
     def download(self, x):
         self.result.append(x)