diff --git a/muted-tests.yml b/muted-tests.yml
index 5186e13a40f19..b49cd0a32bfed 100644
--- a/muted-tests.yml
+++ b/muted-tests.yml
@@ -262,6 +262,9 @@ tests:
 - class: org.elasticsearch.script.mustache.SearchTemplateRequestTests
   method: testConcurrentEquals
   issue: https://github.com/elastic/elasticsearch/issues/119821
+- class: org.elasticsearch.script.mustache.SearchTemplateRequestTests
+  method: testSerialization
+  issue: https://github.com/elastic/elasticsearch/issues/119822
 
 # Examples:
 #