diff --git a/tests/lib/App/AppManagerTest.php b/tests/lib/App/AppManagerTest.php
index 9a4716aa8f1..43d1306578a 100644
--- a/tests/lib/App/AppManagerTest.php
+++ b/tests/lib/App/AppManagerTest.php
@@ -474,16 +474,16 @@ class AppManagerTest extends TestCase {
 			'writable' => false,
 		];
 
-		$fakeTestAppPath = $fakeAppPath . '/' . 'test-test-app';
+		$fakeTestAppPath = $fakeAppPath . '/' . 'test_test_app';
 		mkdir($fakeTestAppPath);
 
-		$generatedAppPath = $this->manager->getAppPath('test-test-app');
+		$generatedAppPath = $this->manager->getAppPath('test_test_app');
 
 		rmdir($fakeTestAppPath);
 		unlink($fakeAppLink);
 		rmdir($fakeAppPath);
 
-		$this->assertEquals($fakeAppLink . '/test-test-app', $generatedAppPath);
+		$this->assertEquals($fakeAppLink . '/test_test_app', $generatedAppPath);
 	}
 
 	public function testGetAppPathFail(): void {
diff --git a/tests/lib/Template/CSSResourceLocatorTest.php b/tests/lib/Template/CSSResourceLocatorTest.php
index 2ae37999b32..fc82c9c3e57 100644
--- a/tests/lib/Template/CSSResourceLocatorTest.php
+++ b/tests/lib/Template/CSSResourceLocatorTest.php
@@ -87,7 +87,7 @@ class CSSResourceLocatorTest extends \Test\TestCase {
 		symlink($apps_dirname, $new_apps_path_symlink);
 
 		// Create an app within that path
-		mkdir($new_apps_path . '/' . 'test-css-app');
+		mkdir($new_apps_path . '/' . 'test_css_app');
 
 		// Use the symlink as the app path
 		\OC::$APPSROOTS[] = [
@@ -97,7 +97,7 @@ class CSSResourceLocatorTest extends \Test\TestCase {
 		];
 
 		$locator = $this->cssResourceLocator();
-		$locator->find(['test-css-app/test-file']);
+		$locator->find(['test_css_app/test-file']);
 
 		$resources = $locator->getResources();
 		$this->assertCount(1, $resources);
@@ -107,8 +107,8 @@ class CSSResourceLocatorTest extends \Test\TestCase {
 		$webRoot = $resource[1];
 		$file = $resource[2];
 
-		$expectedRoot = $new_apps_path . '/test-css-app';
-		$expectedWebRoot = \OC::$WEBROOT . '/css-apps-test/test-css-app';
+		$expectedRoot = $new_apps_path . '/test_css_app';
+		$expectedWebRoot = \OC::$WEBROOT . '/css-apps-test/test_css_app';
 		$expectedFile = 'test-file.css';
 
 		$this->assertEquals($expectedRoot, $root,