diff --git a/tests/lavf-regression.sh b/tests/lavf-regression.sh
index 9a72b8eba8..ebfc51e59d 100755
--- a/tests/lavf-regression.sh
+++ b/tests/lavf-regression.sh
@@ -107,7 +107,7 @@ do_lavf mkv "-acodec mp2 -ab 64k -vcodec mpeg4"
 fi
 
 if [ -n "$do_wtv" ] ; then
-do_lavf wtv
+do_lavf wtv "-acodec ac3_fixed"
 fi
 
 
diff --git a/tests/ref/lavf/wtv b/tests/ref/lavf/wtv
index 35b54e249e..593faf92b3 100644
--- a/tests/ref/lavf/wtv
+++ b/tests/ref/lavf/wtv
@@ -1,3 +1,3 @@
-02d1c7ddb56be679c4697990ec34e36c *./tests/data/lavf/lavf.wtv
+fdcff1719b66a53d65dda5657509df4e *./tests/data/lavf/lavf.wtv
 413696 ./tests/data/lavf/lavf.wtv
-./tests/data/lavf/lavf.wtv CRC=0xc41a3fe7
+./tests/data/lavf/lavf.wtv CRC=0x1d1b8249