diff --git a/tests/unit/tools/test_video.py b/tests/unit/tools/test_video.py
index f77ae2df..4dfcf54b 100644
--- a/tests/unit/tools/test_video.py
+++ b/tests/unit/tools/test_video.py
@@ -4,5 +4,7 @@
 def test_extract_frames_from_video():
     # TODO: consider generating a video on the fly instead
     video_path = "tests/data/video/test.mp4"
+
+    # there are 48 frames at 24 fps in this video file
     res = extract_frames_from_video(video_path)
-    assert len(res) == 1
+    assert len(res) == 2