diff --git a/src/test/java/de/ids_mannheim/korap/index/TestMatchIndex.java b/src/test/java/de/ids_mannheim/korap/index/TestMatchIndex.java
index c1855da..48d6815 100644
--- a/src/test/java/de/ids_mannheim/korap/index/TestMatchIndex.java
+++ b/src/test/java/de/ids_mannheim/korap/index/TestMatchIndex.java
@@ -290,5 +290,7 @@
 
 	assertEquals("totalResults", 1, kr.totalResults());
 	assertEquals("SnippetBrackets (0)", "... ca[{1:ba{2:c}}]", kr.match(0).snippetBrackets());
+
+	//	System.err.println(kr.toJSON());
     };
 };
diff --git a/src/test/resources/index.properties b/src/test/resources/index.properties
new file mode 100644
index 0000000..fa1fd47
--- /dev/null
+++ b/src/test/resources/index.properties
@@ -0,0 +1 @@
+lucene.index.version = ${project.version}