diff --git a/fizz-core/src/test/java/com/fizzgate/proxy/CallbackServiceTests.java b/fizz-core/src/test/java/com/fizzgate/proxy/CallbackServiceTests.java
index b0e16e4..42ced83 100644
--- a/fizz-core/src/test/java/com/fizzgate/proxy/CallbackServiceTests.java
+++ b/fizz-core/src/test/java/com/fizzgate/proxy/CallbackServiceTests.java
@@ -100,7 +100,8 @@ public class CallbackServiceTests {
                 )
         );
 
-        Mono<Void> vm = callbackService.requestBackends(exchange, headers, body, callbackConfig, Collections.EMPTY_MAP);
+        // Mono<Void> vm = callbackService.requestBackends(exchange, headers, body, callbackConfig, Collections.EMPTY_MAP);
+        Mono<Void> vm = callbackService.requestBackends(exchange, headers, null, callbackConfig, Collections.EMPTY_MAP);
         vm.subscribe();
         Thread.sleep(2000);