diff --git a/module.go b/module.go
index 21f4b0c..2af6e91 100644
--- a/module.go
+++ b/module.go
@@ -124,9 +124,6 @@ func (*RootModule) NewModuleInstance(virtualUser modules.VU) modules.Instance {
 	// The SchemaRegistry is a constructor and must be called with new, e.g. new SchemaRegistry(...).
 	mustExport("SchemaRegistry", moduleInstance.schemaRegistryClientClass)
 
-	// This causes the struct fields to be exported to the native (camelCases) JS code.
-	virtualUser.Runtime().SetFieldNameMapper(goja.TagFieldNameMapper("json", true))
-
 	return moduleInstance
 }