diff --git a/CHANGES_NEXT_RELEASE b/CHANGES_NEXT_RELEASE
index e69de29bb2..96d575fabf 100644
--- a/CHANGES_NEXT_RELEASE
+++ b/CHANGES_NEXT_RELEASE
@@ -0,0 +1 @@
+- Fix: memory leak in POST /v2/op/notify operation (#4261)
diff --git a/test/functionalTest/cases/0000_statistics_operation/statistics_with_counters.test b/test/functionalTest/cases/0000_statistics_operation/statistics_with_counters.test
index 0d345c6ef7..0dcfbcb003 100644
--- a/test/functionalTest/cases/0000_statistics_operation/statistics_with_counters.test
+++ b/test/functionalTest/cases/0000_statistics_operation/statistics_with_counters.test
@@ -143,8 +143,6 @@ payload='{
     }
   ]
 }'
-# FIXME #4261. Once the issue gets solved, this line should be uncommented
-# The REGEXPECT part would need a little adapation after that
 orionCurl --url /v2/op/notify -X POST   --payload "$payload"  > /dev/null
 
 
@@ -325,6 +323,9 @@ Content-Length: REGEX(\d+)
                 "OPTIONS": 1,
                 "POST": 1
             },
+            "/v2/op/notify": {
+                "POST": 1
+            },       
             "/v2/registrations": {
                 "GET": 1,
                 "OPTIONS": 1,