diff --git a/tests/fate-run.sh b/tests/fate-run.sh
index cd16f5fcff..bc1efa22d7 100755
--- a/tests/fate-run.sh
+++ b/tests/fate-run.sh
@@ -279,7 +279,7 @@ echov(){
     echo "$@" >&3
 }
 
-AVCONV_OPTS="-nostdin -nostats -noauto_conversion_filters -y -cpuflags $cpuflags"
+AVCONV_OPTS="-nostdin -nostats -noauto_conversion_filters -y -cpuflags $cpuflags -filter_threads $threads"
 COMMON_OPTS="-flags +bitexact -idct simple -sws_flags +accurate_rnd+bitexact -fflags +bitexact"
 DEC_OPTS="$COMMON_OPTS -threads $threads"
 ENC_OPTS="$COMMON_OPTS -threads 1 -dct fastint"