diff --git a/test/decoder_test.exs b/test/decoder_test.exs
index aefe364..f4163ad 100644
--- a/test/decoder_test.exs
+++ b/test/decoder_test.exs
@@ -304,14 +304,14 @@ defmodule Xav.DecoderTest do
                Xav.Decoder.decode(decoder, @opus_frame)
     end
 
-    test "video" do
+    test "video keyframe" do
       decoder = Xav.Decoder.new(:vp8)
 
       assert {:ok, %Xav.Frame{width: 640, height: 480, pts: 0, format: :rgb}} =
                Xav.Decoder.decode(decoder, @vp8_keyframe)
     end
 
-    test "no keyframe" do
+    test "video without prior keyframe" do
       decoder = Xav.Decoder.new(:vp8)
 
       assert {:error, :no_keyframe} = Xav.Decoder.decode(decoder, @vp8_frame)
diff --git a/test/reader_test.exs b/test/reader_test.exs
index 047441b..4efb650 100644
--- a/test/reader_test.exs
+++ b/test/reader_test.exs
@@ -13,20 +13,10 @@ defmodule Xav.ReaderTest do
 
   test "next_frame/1" do
     {:ok, r} = Xav.Reader.new("./test/fixtures/sample_h264.mp4")
-    # test reading 5 seconds
+    # the file has 30fps, try to read 5 seconds
     for _i <- 0..(30 * 5), do: assert({:ok, %Xav.Frame{}} = Xav.Reader.next_frame(r))
   end
 
-  # @tag :debug
-  # test "next_frame/1 audio" do
-  #   {:ok, r} = Xav.Reader.new("./test/fixtures/sample.mp3", read: :audio)
-
-  #   for _i <- 0..5 do
-  #     assert({:ok, %Xav.Frame{} = frame} = Xav.Reader.next_frame(r))
-  #     IO.inspect({byte_size(frame.data), frame})
-  #   end
-  # end
-
   test "to_nx/1" do
     {:ok, r} = Xav.Reader.new("./test/fixtures/sample_h264.mp4")
     {:ok, frame} = Xav.Reader.next_frame(r)
@@ -46,8 +36,8 @@ defmodule Xav.ReaderTest do
 
     test name do
       {:ok, r} = Xav.Reader.new(unquote(file))
-      # test reading 5 seconds
-      for _i <- 0..(30 * 5), do: assert({:ok, %Xav.Frame{}} = Xav.Reader.next_frame(r))
+      # try to read 100 frames
+      for _i <- 0..100, do: assert({:ok, %Xav.Frame{}} = Xav.Reader.next_frame(r))
     end
   end)
 end
diff --git a/test/test_helper.exs b/test/test_helper.exs
index 869559e..6a0af57 100644
--- a/test/test_helper.exs
+++ b/test/test_helper.exs
@@ -1 +1 @@
-ExUnit.start()
+ExUnit.start(capture_log: true)