diff --git a/apps/theming/tests/Themes/DyslexiaFontTest.php b/apps/theming/tests/Themes/DyslexiaFontTest.php
index 05f489449b881..99b6f8cfc8e95 100644
--- a/apps/theming/tests/Themes/DyslexiaFontTest.php
+++ b/apps/theming/tests/Themes/DyslexiaFontTest.php
@@ -163,7 +163,7 @@ public function testGetCustomCss($webRoot, $prettyUrlsEnabled) {
 			->with('htaccess.IgnoreFrontController', false)
 			->willReturn($prettyUrlsEnabled);
 
-		$this->assertStringContainsString("'$webRoot/apps/theming/fonts/OpenDyslexic-Regular.woff'", $this->dyslexiaFont->getCustomCss());
+		$this->assertStringContainsString("'$webRoot/apps/theming/fonts/OpenDyslexic-Regular.otf'", $this->dyslexiaFont->getCustomCss());
 		$this->assertStringNotContainsString('index.php', $this->dyslexiaFont->getCustomCss());
 	}
 }