diff -up netcdf-c-4.9.1/nc_test4/tst_specific_filters.sh.tst-blosc netcdf-c-4.9.1/nc_test4/tst_specific_filters.sh
--- netcdf-c-4.9.1/nc_test4/tst_specific_filters.sh.tst-blosc	2023-02-03 13:49:17.000000000 -0700
+++ netcdf-c-4.9.1/nc_test4/tst_specific_filters.sh	2023-02-12 13:06:51.942354853 -0700
@@ -15,7 +15,7 @@ if test "x$TESTNCZARR" = x1 ; then
 BLOSCARGS="32001,0,0,0,256,5,1,1"
 BLOSCCODEC='[{\"id\": \"blosc\",\"clevel\": 5,\"blocksize\": 256,\"cname\": \"lz4\",\"shuffle\": 1}]'
 else
-BLOSCARGS="32001,0,0,4,256,5,1,1"
+BLOSCARGS="32001,2,2,4,256,5,1,1"
 BLOSCCODEC='[{\"id\": \"blosc\",\"clevel\": 5,\"blocksize\": 256,\"cname\": \"lz4\",\"shuffle\": 1}]'
 fi