getActiveSheet(); $worksheet->setCellValue('B2', "Merge Range {$mergeRange}"); $worksheet->mergeCells($mergeRange); $reloaded = $this->writeAndReload($spreadsheet, 'Ods'); $cell = $reloaded->getActiveSheet()->getCell('B2'); self::assertTrue($cell->isInMergeRange()); self::assertSame($mergeRange, $cell->getMergeRange()); } }