diff --git a/tests/fate/subtitles.mak b/tests/fate/subtitles.mak
index 07d886a0af..4c2771cd39 100644
--- a/tests/fate/subtitles.mak
+++ b/tests/fate/subtitles.mak
@@ -1,6 +1,15 @@
 FATE_SUBTITLES_ASS-$(call ALLYES, AQTITLE_DEMUXER TEXT_DECODER ICONV) += fate-sub-aqtitle
 fate-sub-aqtitle: CMD = fmtstdout ass -sub_charenc windows-1250 -i $(TARGET_SAMPLES)/sub/AQTitle_capability_tester.aqt
 
+FATE_SUBTITLES_ASS-$(call DEMDEC, ASS, ASS) += fate-sub-ass-to-ass-transcode
+fate-sub-ass-to-ass-transcode: CMD = fmtstdout ass -i $(TARGET_SAMPLES)/sub/1ededcbd7b.ass
+
+FATE_SUBTITLES_ASS-$(CONFIG_ASS_DEMUXER) += fate-sub-ssa-to-ass-remux
+fate-sub-ssa-to-ass-remux: CMD = fmtstdout ass -i $(TARGET_SAMPLES)/sub/a9-misc.ssa -c copy
+
+FATE_SUBTITLES-$(call ALLYES, ASS_DEMUXER, MATROSKA_MUXER) += fate-binsub-mksenc
+fate-binsub-mksenc: CMD = md5 -i $(TARGET_SAMPLES)/sub/1ededcbd7b.ass -c copy -f matroska -flags +bitexact
+
 FATE_SUBTITLES_ASS-$(call DEMDEC, JACOSUB, JACOSUB) += fate-sub-jacosub
 fate-sub-jacosub: CMD = fmtstdout ass -i $(TARGET_SAMPLES)/sub/JACOsub_capability_tester.jss
 
diff --git a/tests/ref/fate/binsub-mksenc b/tests/ref/fate/binsub-mksenc
new file mode 100644
index 0000000000..c47349718e
--- /dev/null
+++ b/tests/ref/fate/binsub-mksenc
@@ -0,0 +1 @@
+2dad5f63688ec613a04e94c8d4d167db
diff --git a/tests/ref/fate/sub-ass-to-ass-transcode b/tests/ref/fate/sub-ass-to-ass-transcode
new file mode 100644
index 0000000000..bfc4e95419
--- /dev/null
+++ b/tests/ref/fate/sub-ass-to-ass-transcode
@@ -0,0 +1,62 @@
+[Script Info]
+; Script generated by Aegisub 3.2.2
+; http://www.aegisub.org/
+Title: Default Aegisub file
+ScriptType: v4.00+
+WrapStyle: 0
+PlayResX: 1280
+PlayResY: 720
+ScaledBorderAndShadow: yes
+Video Zoom: 4
+Video Colorspace: BT.601
+Video Aspect Ratio: c1.77778
+YCbCr Matrix: TV.709
+
+[Aegisub Project Garbage]
+Automation Scripts: ~../../../../Aegisub autoload folder/New Folder/cmconv.lua
+Last Style Storage: Default1
+Audio File: kamisama05-premux.mkv
+Video File: kamisama05-premux.mkv
+Keyframes File: ../Desktop/Keyframe Raws/kamisama05-wr.keyframes.txt
+Video AR Mode: 4
+Video AR Value: 1.777778
+Video Zoom Percent: 0.875000
+Video Position: 306
+
+[V4+ Styles]
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+Style: Default - Alt,Luxi Sub Sans,48,&H00F9FDFB,&H00003FFF,&H0A673308,&HDC0A0E10,-1,0,0,0,99,100,0,0,1,2.5,1,8,110,110,40,0
+Style: OP2-Romaji-furigana,Chinacat,21,&H003B1A9A,&H00CBCB9F,&H00FFFFFF,&H00000000,0,0,0,0,96,114,0,0,1,2.5,0,8,40,40,30,1
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+Style: OP1-Romaji,Chinacat,42,&H003B1A9A,&H00CBCB9F,&H00FFFFFF,&H00000000,0,0,0,0,96,114,0,0,1,5,0,8,40,40,30,1
+Style: OP1-Eng,Chinacat,39,&H003B1A9A,&H000019FF,&H00FFFFFF,&H007857D5,0,0,0,0,96,114,0.5,0,1,5,0.1,2,40,40,30,1
+Style: OP2-Romaji,Chinacat,42,&H003B1A9A,&H00CBCB9F,&H00FFFFFF,&H00000000,0,0,0,0,96,114,0,0,1,5,0,8,40,40,30,1
+Style: ED1-Romaji,Agency FB,44,&H00000000,&H00EBDCCD,&H00FFFFFF,&H00000000,0,0,0,0,98,115,0,0,1,3,0,7,40,40,30,1
+Style: ED1-Eng,ClaudeSansPlain,40,&H00000000,&H00EBDCCD,&H00FFFFFF,&H007857D5,0,0,0,0,90,115,0,0,1,4,0,3,40,40,30,1
+Style: ED1-Eng-furigana,ClaudeSansPlain,20,&H00000000,&H00EBDCCD,&H00FFFFFF,&H007857D5,0,0,0,0,90,115,0,0,1,2,0,3,40,40,30,1
+Style: ED1-Romaji-furigana,Agency FB,22,&H00000000,&H00EBDCCD,&H00FFFFFF,&H00000000,0,0,0,0,98,115,0,0,1,1.5,0,7,40,40,30,1
+Style: Signs,Arial,46,&H00FFFFFF,&H000000FF,&H00000000,&H00000000,0,0,0,0,100,100,0,0,1,0,0,5,10,10,10,1
+
+[Events]
+Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text
+Dialogue: 3,0:00:12.74,0:00:13.49,OP1-Romaji,,0,0,0,fx,{\an5\pos(352,54)\move(352,-101,352,54,0,400)\bord3\blur2\2c&HD4B5CB&\fad(300,0)}i
+Dialogue: 3,0:00:12.78,0:00:14.28,OP1-Romaji,,0,0,0,fx,{\an5\pos(365,54)\move(365,-101,365,54,0,400)\bord3\blur2\2c&HD4B5CB&\fad(300,0)}t
+Dialogue: 3,0:00:12.78,0:00:14.28,OP1-Romaji,,0,0,0,fx,{\an5\pos(383,54)\move(383,-101,383,54,0,400)\bord3\blur2\2c&HD4B5CB&\fad(300,0)}t
+Dialogue: 3,0:00:12.78,0:00:14.28,OP1-Romaji,,0,0,0,fx,{\an5\pos(402,54)\move(402,-101,402,54,0,400)\bord3\blur2\2c&HD4B5CB&\fad(300,0)}a
+Dialogue: 3,0:00:12.78,0:00:14.28,OP1-Romaji,,0,0,0,fx,{\an5\pos(416,54)\move(416,-101,416,54,0,400)\bord3\blur2\2c&HD4B5CB&\fad(300,0)}i
+Dialogue: 3,0:00:12.78,0:00:15.11,OP1-Romaji,,0,0,0,fx,{\an5\pos(438,54)\move(438,-101,438,54,0,400)\bord3\blur2\2c&HD4B5CB&\fad(300,0)}k
+Dialogue: 3,0:00:12.78,0:00:15.11,OP1-Romaji,,0,0,0,fx,{\an5\pos(455,54)\move(455,-101,455,54,0,400)\bord3\blur2\2c&HD4B5CB&\fad(300,0)}o
+Dialogue: 10,0:23:52.82,0:23:54.80,Default,,0,0,100,,Wing Fling Hazard!
+
+
+[Aegisub Extradata]
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+
+
diff --git a/tests/ref/fate/sub-ssa-to-ass-remux b/tests/ref/fate/sub-ssa-to-ass-remux
new file mode 100644
index 0000000000..f4405df117
--- /dev/null
+++ b/tests/ref/fate/sub-ssa-to-ass-remux
@@ -0,0 +1,84 @@
+[Script Info]
+; Script generated by Aegisub 2.1.7
+; http://www.aegisub.net
+ScriptType: v4.00
+Collisions: Normal
+PlayResY: 534
+PlayResX: 720
+WrapStyle: 0
+ScaledBorderAndShadow: no
+Video File: 01-.mkv
+Video Aspect Ratio: 1
+Video Zoom: 8
+Video Position: 36805
+Last Style Storage: Default
+Export Encoding: UTF-8
+Export filters: Karaoke template
+Title: Alien Nine 01
+Original Script: ?
+Original Translation: ?
+Original Editing: ?
+Original Timing: ?
+Synch Point: ?
+Script Updated By: lM
+Update Details: Kareoke by Pahndamonium
+
+[V4 Styles]
+Format: Name, Fontname, Fontsize, PrimaryColour, SecondaryColour, TertiaryColour, BackColour, Bold, Italic, BorderStyle, Outline, Shadow, Alignment, MarginL, MarginR, MarginV, AlphaLevel, Encoding
+Style: Song (romaji) ED-furigana,Verdana,15,7363111,8454016,0,16777215,-1,-1,1,1,0,6,30,30,16,0,0
+Style: SongED-furigana,Verdana,15,1393701,8454016,0,16777215,-1,-1,1,1,0,2,30,30,26,0,0
+Style: Song (romaji) OP-furigana,Verdana,15,7363111,8454016,0,16777215,-1,-1,1,1,0,2,30,30,18,0,0
+Style: SongOP-furigana,Verdana,15,3305768,8454016,0,16777215,-1,0,1,1,0,2,30,30,30,0,0
+Style: Signs-furigana,Arial,14,16777215,65535,0,0,-1,0,1,1,0,2,40,40,28,0,0
+Style: CF2-furigana,Verdana,14,16777215,16777215,0,0,-1,-1,1,1,0,2,30,30,30,0,0
+Style: Default-furigana,Verdana,14,16777215,65535,0,0,-1,0,1,1,0,2,30,30,28,0,0
+Style: Default,Verdana,28,16777215,65535,0,0,-1,0,1,2,0,2,30,30,28,0,0
+Style: CF2,Verdana,28,16777215,16777215,0,0,-1,-1,1,2,0,2,30,30,30,0,0
+Style: Signs,Arial,28,16777215,65535,0,0,-1,0,1,2,0,2,40,40,28,0,0
+Style: SongOP,Verdana,30,3305768,8454016,0,16777215,-1,0,1,2,0,2,30,30,30,0,0
+Style: Song (romaji) OP,Verdana,30,7363111,8454016,0,16777215,-1,-1,1,2,0,2,30,30,18,0,0
+Style: SongED,Verdana,30,1393701,8454016,0,16777215,-1,-1,1,2,0,2,30,30,26,0,0
+Style: Song (romaji) ED,Verdana,30,7363111,8454016,0,16777215,-1,-1,1,2,0,6,30,30,16,0,0
+
+[Events]
+Format: Marked, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text
+Dialogue: Marked=0,0:00:02.42,0:00:03.00,*Default,,0000,0000 ,0000,,{\fnComic Sans MS\c&HFF80FF&}All Japan Boys Soccer Tournament Opens!
+Dialogue: Marked=0,0:00:59.60,0:01:00.60,Default,NTP,0000,0000,0000,,Tak tady jsi...
+Dialogue: Marked=0,0:01:00.81,0:01:01.39,Default,NTP,0000,0000,0000,,Ahoj.
+Dialogue: Marked=0,0:01:01.52,0:01:03.98,Default,NTP,0000,0000,0000,,Pojď se mnou.
+Dialogue: Marked=0,0:01:19.71,0:01:30.26,*Default,SONG,0000,0000,0092,,When you hear the bell of Chirin,...
+Dialogue: Marked=0,0:01:30.26,0:01:40.46,*Default,SONG,0000,0000,0000,,YASASHII MATSUGE WO HOHOEMI WO
+Dialogue: Marked=0,0:01:30.26,0:01:40.46,*Default,SONG,0000,0000,0092,,...recall those soft lashes and that gentle smile.
+Dialogue: Marked=0,0:01:40.46,0:01:50.72,*Default,SONG,0000,0000,0000,,CHIRIN NO SUZU DE OMOIDASU
+Dialogue: Marked=0,0:04:45.67,0:04:48.37,*Default,,0000,0000,0000,,{My Eight-Six turned into an Eight-Five ? !}¡¿Mi Hachi-Roku se ha\nconvertido en un Hachi-Go?!
+Dialogue: Marked=0,0:04:48.97,0:04:51.70,*Default,,0000,0000,0000,,{\c&HFFFFFF&}Tomé el auto prestado,\nte dejé un sustituto.
+Dialogue: Marked=0,0:05:01.52,0:05:04.12,*Default,,0000,0000,0000,,{Takumi,Your dad must be really surprised by now. . .}Ahora mismo tu padre\ndebe estar en shock.
+Dialogue: Marked=0,0:00:15.15,0:00:16.30,Default,Voice,0000,0000,0000,,Otani-san...
+Dialogue: Marked=0,0:00:16.93,0:00:18.17,Default,,0000,0000,0000,,Otani-san...
+Dialogue: Marked=0,0:00:18.00,0:00:21.18,Signs,Sign,0000,0000,0000,,{\a6}Sixth Grade Camellia Class
+Dialogue: Marked=0,0:00:18.58,0:00:19.80,Default,Voice,0000,0000,0000,,Otani-san...
+Dialogue: Marked=0,0:00:20.45,0:00:21.64,Default,,0000,0000,0000,,Otani-san...
+Dialogue: Marked=0,0:00:21.38,0:00:25.88,Signs,Chalkboard,0000,0000,0000,,{\a6}Alien Counter-Measure Officer
+Dialogue: Marked=0,0:00:22.55,0:00:23.91,Default,Voice,0000,0000,0000,,Otani-san...
+Dialogue: Marked=0,0:00:24.35,0:00:25.46,Default,,0000,0000,0000,,Furukawa-san...
+Dialogue: Marked=0,0:00:26.05,0:00:27.23,Signs,Board,0000,0000,0000,,{\a6}Otani                 Furukawa                 Tatsuta
+Dialogue: Marked=0,0:01:04.66,0:01:05.87,Song (romaji) OP,,0000,0000,0000,,{2c&H5D8FC3&\c&H75BADB&\2c&H5F7CC3&}{\k15}Fu{\k22}tsu{\k11}u {\k25}ja {\k13}na{\k39}i
+Dialogue: Marked=0,0:01:05.93,0:01:07.43,Song (romaji) OP,,0000,0000,0000,,{2c&H5D8FC3&\c&H75BADB&\2c&H5F7CC3&}{\k30}A{\k30}sa {\k17}ga {\k23}ki{\k50}te
+Dialogue: Marked=0,0:01:07.60,0:01:10.60,Song (romaji) OP,,0000,0000,0000,,{2c&H5D8FC3&\c&H75BADB&\2c&H5F7CC3&}{\k27}Na{\k8}i{\k23}fu {\k19}no {\k18}sa{\k32}sa{\k9}t{\k28}ta {\k18}ha{\k9}a{\k28}to {\k18}ga {\k14}u{\k27}zu{\k22}ku
+Dialogue: Marked=0,0:01:10.71,0:01:11.99,Song (romaji) OP,,0000,0000,0000,,{2c&H5D8FC3&\c&H75BADB&\2c&H5F7CC3&}{\k22}Ne{\k21}bo{\k8}u {\k29}shi{\k23}ta{\k25}i
+Dialogue: Marked=0,0:25:19.73,0:25:23.58,Signs,Text,0029,0427,0322,,{\pos(169,215)}Elementary School #9
+Dialogue: Marked=0,0:25:19.73,0:25:23.58,Signs,,0030,0279,0371,,{\pos(220,251)}Alien Counter-Measure Officers
+Dialogue: Marked=0,0:25:19.73,0:25:23.58,Signs,,0398,0209,0038,,{\pos(617,413)}The End
+Dialogue: Marked=0,0:25:35.06,0:25:36.67,Song (romaji) ED,,0000,0000,0000,,{\c&H9C6348&\2c&H372824&\fs24\pos(92,470)}{0}{\k25}To{\k43}ki-{\k32}do{\kf61}ki
+Dialogue: Marked=0,0:25:36.68,0:25:40.69,Song (romaji) ED,,0000,0000,0000,,{\c&H9C6348&\2c&H372824&\fs24\pos(125,471)}{0}{\k46}Ko{\k27}no {\k46}ka{\k36}ra{\k47}da {\kf200}ga
+Dialogue: Marked=0,0:25:45.04,0:25:47.97,Song (romaji) ED,,0000,0000,0000,,{\c&H9C6348&\2c&H372824&\fs24\pos(132,471)}{\k35}Yo{\k28}ro{\k41}ko{\k35}bi {\k28}na {\k26}no {\k100}ka
+Dialogue: Marked=0,0:25:47.98,0:25:50.22,Song (romaji) ED,,0000,0000,0000,,{\c&H9C6348&\2c&H372824&\fs24\pos(143,473)}{\k14}Ka{\k20}na{\k26}shi{\k15}mi {\k32}na {\k65}no {\k52}ka
+Dialogue: Marked=0,0:25:35.06,0:25:36.67,SongED,,0000,0000,0000,,{\fs24\pos(100,521)}Sometimes
+Dialogue: Marked=0,0:25:36.68,0:25:40.69,SongED,,0000,0000,0000,,{\fs24\pos(136,522)}Whether this body
+Dialogue: Marked=0,0:25:45.04,0:25:47.97,SongED,,0000,0000,0000,,{\fs24\pos(107,520)}Is happiness
+Dialogue: Marked=0,0:25:47.98,0:25:50.22,SongED,,0000,0000,0000,,{\fs24\pos(100,521)}Or sadness
+
+
+
+
+