diff --git a/src/test/java/de/ids_mannheim/korap/query/serialize/CollectionQueryDuplicateTest.java b/src/test/java/de/ids_mannheim/korap/query/serialize/CollectionQueryDuplicateTest.java
new file mode 100644
index 0000000..c655c9a
--- /dev/null
+++ b/src/test/java/de/ids_mannheim/korap/query/serialize/CollectionQueryDuplicateTest.java
@@ -0,0 +1,32 @@
+package de.ids_mannheim.korap.query.serialize;
+
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import org.junit.Test;
+
+import java.io.IOException;
+
+/**
+ * @author hanl
+ * @date 28/07/2015
+ */
+public class CollectionQueryDuplicateTest {
+
+    @Test
+    public void testCollectionQueryDuplicateThrowsNoException() {
+        QuerySerializer serializer = new QuerySerializer();
+        serializer.setQuery("[base=Haus]", "poliqarp");
+        serializer.setCollection("textClass=politik & corpusID=WPD");
+        ObjectMapper m = new ObjectMapper();
+        try {
+            JsonNode first = m.readTree(serializer.toJSON());
+            JsonNode second = m.readTree(serializer.toJSON());
+
+            assert first.at("/collection").equals(second.at("/collection"));
+
+        }catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+
+}