diff --git a/src/test/java/de/ids_mannheim/korap/collection/TestKrillCollection.java b/src/test/java/de/ids_mannheim/korap/collection/TestKrillCollection.java
index ff8e755..3d26271 100644
--- a/src/test/java/de/ids_mannheim/korap/collection/TestKrillCollection.java
+++ b/src/test/java/de/ids_mannheim/korap/collection/TestKrillCollection.java
@@ -20,6 +20,7 @@
         assertEquals(-1, kc.numberOf("tokens"));
         assertEquals(-1, kc.numberOf("documents"));
         assertEquals(-1, kc.numberOf("sentences"));
+        KrillProperties.setProp(null);
         KrillProperties.loadDefaultProperties();
     }
 }