diff --git a/tests/playTests.sh b/tests/playTests.sh
index 456bef5c2..9b3915a76 100755
--- a/tests/playTests.sh
+++ b/tests/playTests.sh
@@ -237,6 +237,7 @@ $ECHO "\n===>  Advanced compression parameters "
 $ECHO "Hello world!" | $ZSTD --zstd=windowLog=21,      - -o tmp.zst && die "wrong parameters not detected!"
 $ECHO "Hello world!" | $ZSTD --zstd=windowLo=21        - -o tmp.zst && die "wrong parameters not detected!"
 $ECHO "Hello world!" | $ZSTD --zstd=windowLog=21,slog  - -o tmp.zst && die "wrong parameters not detected!"
+$ECHO "Hello world!" | $ZSTD --zstd=strategy=10        - -o tmp.zst && die "parameter out of bound not detected!"  # > btultra2 : does not exist
 test ! -f tmp.zst  # tmp.zst should not be created
 roundTripTest -g512K
 roundTripTest -g512K " --zstd=mml=3,tlen=48,strat=6"
@@ -244,7 +245,7 @@ roundTripTest -g512K " --zstd=strat=6,wlog=23,clog=23,hlog=22,slog=6"
 roundTripTest -g512K " --zstd=windowLog=23,chainLog=23,hashLog=22,searchLog=6,minMatch=3,targetLength=48,strategy=6"
 roundTripTest -g512K " --single-thread --long --zstd=ldmHashLog=20,ldmMinMatch=64,ldmBucketSizeLog=1,ldmHashRateLog=7"
 roundTripTest -g512K " --single-thread --long --zstd=lhlog=20,lmml=64,lblog=1,lhrlog=7"
-roundTripTest -g512K 19
+roundTripTest -g64K  "19 --zstd=strat=9"   # btultra2
 
 
 $ECHO "\n===>  Pass-Through mode "