diff --git a/cara/tests/apps/calculator/test_webapp.py b/cara/tests/apps/calculator/test_webapp.py
index 65f3b216..e6b4eedf 100644
--- a/cara/tests/apps/calculator/test_webapp.py
+++ b/cara/tests/apps/calculator/test_webapp.py
@@ -6,7 +6,7 @@ import tornado.testing
 import cara.apps.calculator
 from cara.apps.calculator.report_generator import generate_permalink
 
-_TIMEOUT = 20.
+_TIMEOUT = 30.
 
 @pytest.fixture
 def app():