diff --git a/tests/regression.sh b/tests/regression.sh
index c6fd6cb94b..8a1e095a11 100755
--- a/tests/regression.sh
+++ b/tests/regression.sh
@@ -145,7 +145,6 @@ do_ffmpeg_crc()
 
 do_ffmpeg_nocheck()
 {
-    f="$1"
     shift
     echo $ffmpeg $FFMPEG_OPTS $*
     $ffmpeg $FFMPEG_OPTS -benchmark $* > $bench 2> /tmp/ffmpeg$$