diff --git a/test-tool/test_sanitize_overwrite_reserved.c b/test-tool/test_sanitize_overwrite_reserved.c
index 20a0779..79f8a92 100644
--- a/test-tool/test_sanitize_overwrite_reserved.c
+++ b/test-tool/test_sanitize_overwrite_reserved.c
@@ -67,6 +67,13 @@ void test_sanitize_overwrite_reserved(void)
 
         CHECK_FOR_SANITIZE;
         CHECK_FOR_DATALOSS;
+        if (sd->iscsi_ctx == NULL) {
+                const char *err = "[SKIPPED] This test is "
+                        "only supported for iSCSI backends";
+                logging(LOG_NORMAL, "%s", err);
+                CU_PASS(err);
+                return;
+        }
 
         local_iscsi_queue_pdu = my_iscsi_queue_pdu;