diff --git a/tests/phpunit/integration/MediaWikiGadgetsDefinitionRepoTest.php b/tests/phpunit/integration/MediaWikiGadgetsDefinitionRepoTest.php
index 0440dfff..0e6308c4 100644
--- a/tests/phpunit/integration/MediaWikiGadgetsDefinitionRepoTest.php
+++ b/tests/phpunit/integration/MediaWikiGadgetsDefinitionRepoTest.php
@@ -31,4 +31,36 @@ EOT;
 		$this->assertEquals( 'keep-section1', $bar->toArray()['category'] );
 	}
 
+	/**
+	 * @covers \MediaWiki\Extension\Gadgets\Hooks::onPageSaveComplete
+	 * @covers \MediaWiki\Extension\Gadgets\Hooks::onPageDeleteComplete
+	 * @covers \MediaWiki\Extension\Gadgets\GadgetRepo::handlePageUpdate
+	 * @covers \MediaWiki\Extension\Gadgets\MediaWikiGadgetsDefinitionRepo
+	 */
+	public function testCacheInvalidationOnSave() {
+		$services = $this->getServiceContainer();
+		$wanCache = WANObjectCache::newEmpty();
+		$wanCache->useInterimHoldOffCaching( false );
+
+		$repo = new MediaWikiGadgetsDefinitionRepo( $wanCache, $services->getRevisionLookup() );
+		$this->setService( 'GadgetsRepo', $repo );
+
+		$this->editPage( 'MediaWiki:Gadgets-definition', '* X1[ResourceLoader|default]|foo.js' );
+		$this->assertEquals( [ 'X1' ], $repo->getGadgetIds() );
+		$this->assertTrue( $repo->getGadget( 'X1' )->isOnByDefault() );
+
+		$this->editPage( 'MediaWiki:Gadgets-definition', "* X1[ResourceLoader|default]|foo.js\n" .
+			"* X2[ResourceLoader|default]|foo.css" );
+		$this->assertEquals( [ 'X1', 'X2' ], $repo->getGadgetIds() );
+
+		// Disable X1 by default
+		$this->editPage( 'MediaWiki:Gadgets-definition', "* X1[ResourceLoader]|foo.js\n" .
+			"* X2[ResourceLoader|default]|foo.css" );
+		$this->assertFalse( $repo->getGadget( 'X1' )->isOnByDefault() );
+
+		$this->deletePage( $services->getWikiPageFactory()->newFromTitle(
+			Title::newFromText( 'MediaWiki:Gadgets-definition' ) ) );
+		$this->assertEquals( [], $repo->getGadgetIds() );
+	}
+
 }