diff --git a/libavformat/movenc.c b/libavformat/movenc.c
index af7efc9ba1..80ddd2c78f 100644
--- a/libavformat/movenc.c
+++ b/libavformat/movenc.c
@@ -3761,7 +3761,7 @@ static int mov_write_header(AVFormatContext *s)
     }
 
     if (!supports_edts(mov) && s->avoid_negative_ts < 0) {
-        s->avoid_negative_ts = 1;
+        s->avoid_negative_ts = 2;
     }
 
     /* Non-seekable output is ok if using fragmentation. If ism_lookahead
diff --git a/tests/ref/fate/sub-movtextenc b/tests/ref/fate/sub-movtextenc
index fef4a977a5..f6f41746a6 100644
--- a/tests/ref/fate/sub-movtextenc
+++ b/tests/ref/fate/sub-movtextenc
@@ -1 +1 @@
-8cb21f3632e1c86358429fb9402d19d4
+cf3d43e6de1f97681583ba08d9fe5938
diff --git a/tests/ref/lavf/ismv b/tests/ref/lavf/ismv
index dd4b162d4e..764695e54d 100644
--- a/tests/ref/lavf/ismv
+++ b/tests/ref/lavf/ismv
@@ -1,9 +1,9 @@
-ec3e7d37755378cbe9907175768afbac *./tests/data/lavf/lavf.ismv
+df243ab73b33905776bdaefb79d14be8 *./tests/data/lavf/lavf.ismv
 312453 ./tests/data/lavf/lavf.ismv
-./tests/data/lavf/lavf.ismv CRC=0x9d9a638a
-a4b6fb1f46848622477230f69040942c *./tests/data/lavf/lavf.ismv
+./tests/data/lavf/lavf.ismv CRC=0xb7d29d29
+c40d80b3b35c9cd1324dead65dfcdb69 *./tests/data/lavf/lavf.ismv
 321359 ./tests/data/lavf/lavf.ismv
-./tests/data/lavf/lavf.ismv CRC=0xe8130120
-ec3e7d37755378cbe9907175768afbac *./tests/data/lavf/lavf.ismv
+./tests/data/lavf/lavf.ismv CRC=0x33834815
+df243ab73b33905776bdaefb79d14be8 *./tests/data/lavf/lavf.ismv
 312453 ./tests/data/lavf/lavf.ismv
-./tests/data/lavf/lavf.ismv CRC=0x9d9a638a
+./tests/data/lavf/lavf.ismv CRC=0xb7d29d29