diff --git a/tests/fate-run.sh b/tests/fate-run.sh
index 26ccaea3f5..39981c1332 100755
--- a/tests/fate-run.sh
+++ b/tests/fate-run.sh
@@ -108,7 +108,7 @@ enc_dec_pcm(){
     cleanfiles=$encfile
     encfile=$(target_path ${encfile})
     ffmpeg -i $src_file "$@" -f $out_fmt -y ${encfile} || return
-    ffmpeg -i ${encfile} -c:a pcm_${pcm_fmt} -f ${dec_fmt} -
+    ffmpeg -flags +bitexact -i ${encfile} -c:a pcm_${pcm_fmt} -f ${dec_fmt} -
 }
 
 FLAGS="-flags +bitexact -sws_flags +accurate_rnd+bitexact"