diff --git a/tests/config-grid-only.evcc.yaml b/tests/config-grid-only.evcc.yaml
index 99832e635..589f89b65 100755
--- a/tests/config-grid-only.evcc.yaml
+++ b/tests/config-grid-only.evcc.yaml
@@ -1,3 +1,5 @@
+interval: 0.1s
+
 site:
   title: Hello World
   meters: