For example, after you did some upgrade, you find there is garbage character for the "Variant of report"(report painter) in your TEST system.
You can export the variants from PRD system and import it into TEST system.
Review the note 122969. To do that follow the below steps:
First as a test you can import/export a single variant for a report group.
1.In PRD, go to transaction GR55->Utilities->Maintain Variants->Export variant->Enter a single variant that has wrong text in TEST system. Enter
the report group name and select all variants and enter the file for export->F8.
2.To import the variant in TEST system GR55->Utilities->Maintain Variants-> Import-> enter the path of the file exported to the local machine.
and click execute.
Check if it works then you can transport all the other variants.