* @covers DifferenceEngineSlotDiffRenderer::getExtraCacheKeys
*/
public function testGetExtraCacheKeys_noExternalDiffEngineConfigured() {
- $this->setMwGlobals( [ 'wgExternalDiffEngine' => null ] );
+ $this->setMwGlobals( [
+ 'wgDiffEngine' => null,
+ 'wgExternalDiffEngine' => null,
+ ] );
$differenceEngine = new CustomDifferenceEngine();
$slotDiffRenderer = new DifferenceEngineSlotDiffRenderer( $differenceEngine );