diff --git a/nczarr_test/test_filter_avail.c b/nczarr_test/test_filter_avail.c
new file mode 100644
index 0000000000..9e403fb302
--- /dev/null
+++ b/nczarr_test/test_filter_avail.c
@@ -0,0 +1,107 @@
+#define TESTNCZARR
+/*
+  Copyright 2018, UCAR/Unidata
+  See COPYRIGHT file for copying and redistribution conditions.
+*/
+
+#include "config.h"
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+#ifdef USE_HDF5
+#include <hdf5.h>
+#endif
+
+#include "netcdf.h"
+#include "netcdf_aux.h"
+#include "netcdf_filter.h"
+
+#undef DEBUG
+
+#define MAXPARAMS 32
+
+#ifdef TESTNCZARR
+#define DFALT_TESTFILE "file://tmp_filter_avail.file#mode=nczarr,file"
+#else
+#define DFALT_TESTFILE "tmp_filter_avail.nc"
+#endif
+
+static const char* testfile = NULL;
+static int nerrs = 0;
+
+static int ncid;
+
+/* Forward */
+static int test_test1(void);
+static void init(int argc, char** argv);
+
+#define ERRR do { \
+fflush(stdout); /* Make sure our stdout is synced with stderr. */ \
+fprintf(stderr, "Sorry! Unexpected result, %s, line: %d\n", \
+        __FILE__, __LINE__);                                \
+nerrs++;\
+} while (0)
+
+static int
+check(int err,int line)
+{
+    if(err != NC_NOERR) {
+        fprintf(stderr,"fail (%d): %s\n",line,nc_strerror(err));
+    }
+    return NC_NOERR;
+}
+
+#define CHECK(x) check(x,__LINE__)
+
+static int
+test_test1(void)
+{
+    int stat = NC_NOERR;
+
+    printf("test1: bzip2 availability\n");
+    CHECK(nc_create(testfile,NC_NETCDF4|NC_CLOBBER,&ncid));
+    CHECK(nc_enddef(ncid));
+    switch (stat = nc_inq_filter_avail(ncid,H5Z_FILTER_BZIP2)) {
+    case NC_NOERR: break;
+    case NC_ENOFILTER: break;
+    default: CHECK(stat); goto done;
+    }
+    if(stat == NC_ENOFILTER) {
+	printf("*** FAIL: filter %d not available\n",H5Z_FILTER_BZIP2);
+    } else {
+	printf("*** PASS: filter %d available\n",H5Z_FILTER_BZIP2);
+    }
+
+    CHECK(nc_abort(ncid));
+done:
+    return stat;
+}
+
+/**************************************************/
+/* Utilities */
+
+static void
+init(int argc, char** argv)
+{
+    /* get the testfile path */
+    if(argc > 1)
+        testfile = argv[1];
+    else
+        testfile = DFALT_TESTFILE;
+}
+
+/**************************************************/
+int
+main(int argc, char **argv)
+{
+#ifdef USE_HDF5
+#ifdef DEBUG
+    H5Eprint1(stderr);
+    nc_set_log_level(1);
+#endif
+#endif
+    init(argc,argv);
+    if(test_test1() != NC_NOERR) ERRR;
+    exit(nerrs > 0?1:0);
+}