diff --git a/tests/acceptance/00_basics/def.json/bad-json.cf b/tests/acceptance/00_basics/def.json/bad-json.cf
index 2eb0c23bf9..dceeca90e8 100644
--- a/tests/acceptance/00_basics/def.json/bad-json.cf
+++ b/tests/acceptance/00_basics/def.json/bad-json.cf
@@ -15,7 +15,7 @@ bundle agent test
         meta => { "ENT-10257" };
 
   methods:
-      "" usebundle => file_copy("$(this.promise_filename).json", "$(sys.inputdir)$(const.dirsep)def.json");
+      "" usebundle => file_copy("$(this.promise_filename).x.json", "$(sys.inputdir)$(const.dirsep)def.json");
 }
 
 #######################################################
diff --git a/tests/acceptance/00_basics/def.json/bad-json.cf.json b/tests/acceptance/00_basics/def.json/bad-json.cf.x.json
similarity index 100%
rename from tests/acceptance/00_basics/def.json/bad-json.cf.json
rename to tests/acceptance/00_basics/def.json/bad-json.cf.x.json