WIP.
diff --git a/nlpcraft/src/test/scala/org/apache/nlpcraft/model/intent/idl/compiler/functions/NCIdlFunctionsMeta.scala b/nlpcraft/src/test/scala/org/apache/nlpcraft/model/intent/idl/compiler/functions/NCIdlFunctionsMeta.scala
index a136f53..f05802f 100644
--- a/nlpcraft/src/test/scala/org/apache/nlpcraft/model/intent/idl/compiler/functions/NCIdlFunctionsMeta.scala
+++ b/nlpcraft/src/test/scala/org/apache/nlpcraft/model/intent/idl/compiler/functions/NCIdlFunctionsMeta.scala
@@ -48,7 +48,6 @@
             token = Some(tkn(meta = Map("k1" → "v1")))
         )
 
-
     @Test
     def testMetaRequest(): Unit =
         test(
@@ -109,8 +108,8 @@
             )
         )
 
-    private def test(pred: String, idlCtx: ⇒ NCIdlContext = ctx(), token: Option[NCToken] = None): Unit =
+    private def test(f: String, idlCtx: ⇒ NCIdlContext = ctx(), token: Option[NCToken] = None): Unit =
         test(
-            TestDesc(truth = s"get($pred(), 'k1') == 'v1'", token = token, idlCtx = idlCtx)
+            TestDesc(truth = s"$f('k1') == 'v1'", token = token, idlCtx = idlCtx)
         )
 }
diff --git a/nlpcraft/src/test/scala/org/apache/nlpcraft/model/intent/idl/compiler/functions/NCIdlFunctionsOther.scala b/nlpcraft/src/test/scala/org/apache/nlpcraft/model/intent/idl/compiler/functions/NCIdlFunctionsOther.scala
index b8c2e52..baa52e3 100644
--- a/nlpcraft/src/test/scala/org/apache/nlpcraft/model/intent/idl/compiler/functions/NCIdlFunctionsOther.scala
+++ b/nlpcraft/src/test/scala/org/apache/nlpcraft/model/intent/idl/compiler/functions/NCIdlFunctionsOther.scala
@@ -39,10 +39,12 @@
 
         sys.put("k1", "v1")
 
+        val js = "{\"k1\": \"v1\"}"
+
         // JSON.
         test(
-            "has(json(meta_sys()), 'k1') == true",
-            "has(json(meta_sys()), 'k2') == false"
+            s"has(json($js), 'k1') == true",
+            s"has(json($js), 'k2') == false"
         )
     }
 }