First attempt to support class numbers from 1 to 255 - 1 is the new default class number
diff --git a/src/test/resources/queries/bsp3.jsonld b/src/test/resources/queries/bsp3.jsonld
index 1a40038..0e76838 100644
--- a/src/test/resources/queries/bsp3.jsonld
+++ b/src/test/resources/queries/bsp3.jsonld
@@ -103,12 +103,12 @@
   "query": {
     "@type": "korap:group", 
     "operation": "operation:submatch", 
-    "classRef": [0],
+    "classRef": [1],
     "operands": [
       {
         "@type": "korap:group", 
         "operation" : "operation:class",
-        "class": 0, 
+        "class": 1, 
         "operands": [
           {
             "@type": "korap:token",