diff --git a/tests/ffmpeg.regression.ref b/tests/ffmpeg.regression.ref
index 7102ecbb5f..25db4b98cd 100644
--- a/tests/ffmpeg.regression.ref
+++ b/tests/ffmpeg.regression.ref
@@ -177,6 +177,9 @@ stddev: 9328.41 PSNR: 16.92 bytes:  1055276/  1058444
 stddev: 4394.71 PSNR: 23.46 bytes:  1053352/  1058444
 aefe11ab5067621a1c674859d6413891 *./tests/data/a-ac3.rm
 98203 ./tests/data/a-ac3.rm
+39d5646cba5a6cfedfd58845e6df3c06 *./tests/data/ac3.vsynth.out.wav
+stddev:10496.20 PSNR: 15.90 bytes:  1056812/  1058444
+stddev: 4631.51 PSNR: 23.00 bytes:  1055788/  1058444
 39878597b1d65cce473639a7d8c93b02 *./tests/data/a-g726.wav
 24279 ./tests/data/a-g726.wav
 888f2f016e608d044a1bacbca5497ed2 *./tests/data/g726.vsynth.out.wav
diff --git a/tests/regression.sh b/tests/regression.sh
index b3751045c2..d97d28eb84 100755
--- a/tests/regression.sh
+++ b/tests/regression.sh
@@ -381,7 +381,8 @@ fi
 
 if [ -n "$do_ac3" ] ; then
 do_audio_encoding ac3.rm "" -vn
-#do_audio_decoding
+do_audio_decoding
+$tiny_psnr $pcm_dst $pcm_ref 2 1024 >> $logfile
 fi
 
 if [ -n "$do_g726" ] ; then
diff --git a/tests/rotozoom.regression.ref b/tests/rotozoom.regression.ref
index 1390ea2a75..ebc63551d0 100644
--- a/tests/rotozoom.regression.ref
+++ b/tests/rotozoom.regression.ref
@@ -177,6 +177,9 @@ stddev: 9328.41 PSNR: 16.92 bytes:  1055276/  1058444
 stddev: 4394.71 PSNR: 23.46 bytes:  1053352/  1058444
 aefe11ab5067621a1c674859d6413891 *./tests/data/a-ac3.rm
 98203 ./tests/data/a-ac3.rm
+39d5646cba5a6cfedfd58845e6df3c06 *./tests/data/ac3.rotozoom.out.wav
+stddev:10496.20 PSNR: 15.90 bytes:  1056812/  1058444
+stddev: 4631.51 PSNR: 23.00 bytes:  1055788/  1058444
 39878597b1d65cce473639a7d8c93b02 *./tests/data/a-g726.wav
 24279 ./tests/data/a-g726.wav
 888f2f016e608d044a1bacbca5497ed2 *./tests/data/g726.rotozoom.out.wav