diff --git a/tests/ffmpeg.regression.ref b/tests/ffmpeg.regression.ref
index 64c7bb0acc5b4b5c1fb0e5a0e4db05e054884ce2..2d444fa3005ca798ddfa93232d98574ee2d3b326 100644
--- a/tests/ffmpeg.regression.ref
+++ b/tests/ffmpeg.regression.ref
@@ -5,6 +5,9 @@ stddev:  7.66 PSNR:30.43 bytes:7602176
 d407d83f6fa7c98468a6f69a40bdc6a0 *./data/a-mpeg2.mpg
 d2421f070ffc974735cb53d3cac687c7 *./data/out.yuv
 stddev:  7.68 PSNR:30.41 bytes:7602176
+b7d78c9f045e063707ad51d71f597885 *./data/a-mpeg2.mpg
+4ea5aada565f1ef35cdf1d461fc5534d *./data/out.yuv
+stddev:  7.68 PSNR:30.40 bytes:7602176
 d295328b9860a8daf49e783e7644b566 *./data/a-mpeg2i.mpg
 4acf1008a49f18b9ab632d2470bdc22a *./data/out.yuv
 stddev:  7.70 PSNR:30.39 bytes:7602176
diff --git a/tests/regression.sh b/tests/regression.sh
index 6970649f33d4e20412e1dd8f0d6c3decf8ecc072..8b6fe6a7f36783be4a381a852814a59839d70e6e 100755
--- a/tests/regression.sh
+++ b/tests/regression.sh
@@ -150,6 +150,13 @@ do_ffmpeg $file -y -qscale 10 -f pgmyuv -i $raw_src -vcodec mpeg2video -f mpeg1v
 # mpeg2 decoding
 do_ffmpeg $raw_dst -y -i $file -f rawvideo $raw_dst
 
+# mpeg2 encoding
+file=${outfile}mpeg2.mpg
+do_ffmpeg $file -y -qscale 10 -f pgmyuv -i $raw_src -vcodec mpeg2video -idct_algo 1 -dct_algo 2 -f mpeg1video $file 
+
+# mpeg2 decoding
+do_ffmpeg $raw_dst -y -idct_algo 1 -i $file -f rawvideo $raw_dst
+
 # mpeg2 encoding interlaced
 file=${outfile}mpeg2i.mpg
 do_ffmpeg $file -y -qscale 10 -f pgmyuv -i $raw_src -vcodec mpeg2video -f mpeg1video -ildct -ilme $file 
diff --git a/tests/rotozoom.regression.ref b/tests/rotozoom.regression.ref
index eb2fe96c0d83e15db94c33d48ef98e361b43919e..3920e3392c486227192443258ba5917a2380db96 100644
--- a/tests/rotozoom.regression.ref
+++ b/tests/rotozoom.regression.ref
@@ -5,6 +5,9 @@ stddev:  5.03 PSNR:34.07 bytes:7602176
 8a7a3b90f1fac5e207f3e9e3cdf11197 *./data/a-mpeg2.mpg
 686d5937aec5c8ffd3a7be5363580b79 *./data/out.yuv
 stddev:  5.05 PSNR:34.04 bytes:7602176
+7b9333730f9a1ca89134b9b1c55700d3 *./data/a-mpeg2.mpg
+acd0d0f73b95d5a4ed5da34e567e4a6e *./data/out.yuv
+stddev:  5.05 PSNR:34.04 bytes:7602176
 3f5ee459440c4bc5f9fd8f53e2591073 *./data/a-mpeg2i.mpg
 07f678cfa5f1c81657dadbc820d20841 *./data/out.yuv
 stddev:  5.06 PSNR:34.02 bytes:7602176