diff --git a/tests/assets/dual_audio_vtt.mkv b/tests/assets/dual_audio_vtt.mkv
new file mode 100644
index 00000000..7ee7bf96
Binary files /dev/null and b/tests/assets/dual_audio_vtt.mkv differ
diff --git a/tests/assets/subtitle.vtt b/tests/assets/subtitle.vtt
new file mode 100644
index 00000000..9772d22f
--- /dev/null
+++ b/tests/assets/subtitle.vtt
@@ -0,0 +1,12 @@
+WEBVTT
+00:00:01.500 --> 00:00:04.000
+Good Morning!
+
+00:00:04.500 --> 00:00:08.300
+Good Afternoon!
+
+00:00:08.500 --> 00:00:12.300
+Good Evening!
+
+00:00:013.500 --> 00:00:20.300
+Good Night!