diff --git a/src/test/java/de/ids_mannheim/korap/collection/TestKrillCollectionJSON.java b/src/test/java/de/ids_mannheim/korap/collection/TestKrillCollectionJSON.java
index e8fa3f8..0068ac9 100644
--- a/src/test/java/de/ids_mannheim/korap/collection/TestKrillCollectionJSON.java
+++ b/src/test/java/de/ids_mannheim/korap/collection/TestKrillCollectionJSON.java
@@ -106,6 +106,30 @@
 
 
     @Test
+    public void collectionWithSpecialcharacter () {
+        String query = _getJSONString("collection_with_special_char.jsonld");
+        Krill ks = new Krill(query);
+        assertFalse(ks.hasErrors());
+        assertFalse(ks.hasWarnings());
+        assertFalse(ks.hasMessages());
+        assertEquals("QueryWrapperFilter(author:/Goe:th=e/)", ks.getCollection().toString());
+    };
+
+
+    @Test
+    public void collectionWithWorkaroundSharp () {
+
+        // This test should fail, when a ugly workaround is in charge!
+        String query = _getJSONString("collection_with_sharp.jsonld");
+        Krill ks = new Krill(query);
+        assertFalse(ks.hasErrors());
+        assertFalse(ks.hasWarnings());
+        assertFalse(ks.hasMessages());
+        assertEquals("QueryWrapperFilter(author:/Goe#the/)", ks.getCollection().toString());
+    };
+
+
+    @Test
     public void nocollectiontypegiven () {
         String metaQuery = _getJSONString("multiterm_rewrite_collection.jsonld");
         KrillCollection kc = new KrillCollection(metaQuery);
diff --git a/src/test/resources/queries/collections/collection_with_sharp.jsonld b/src/test/resources/queries/collections/collection_with_sharp.jsonld
new file mode 100644
index 0000000..18e8bc8
--- /dev/null
+++ b/src/test/resources/queries/collections/collection_with_sharp.jsonld
@@ -0,0 +1,26 @@
+{
+  "@context":"http://korap.ids-mannheim.de/ns/koral/0.3/context.jsonld",
+  "errors":[],
+  "warnings":[],
+  "messages":[],
+  "query":{
+    "@type":"koral:token",
+    "wrap":{
+      "@type":"koral:term",
+      "layer":"orth",
+      "key":"der",
+      "match":"match:eq",	
+      "foundry":"opennlp"
+    }
+  },
+  "collection":{
+    "value":"Goe#the",
+    "match":"match:eq",
+    "type":"type:regex",
+    "key":"author",
+    "@type":"koral:doc"
+  },
+  "meta":{
+    "cutOff":null
+  }
+}
diff --git a/src/test/resources/queries/collections/collection_with_special_char.jsonld b/src/test/resources/queries/collections/collection_with_special_char.jsonld
new file mode 100644
index 0000000..df63afa
--- /dev/null
+++ b/src/test/resources/queries/collections/collection_with_special_char.jsonld
@@ -0,0 +1,26 @@
+{
+  "@context":"http://korap.ids-mannheim.de/ns/koral/0.3/context.jsonld",
+  "errors":[],
+  "warnings":[],
+  "messages":[],
+  "query":{
+    "@type":"koral:token",
+    "wrap":{
+      "@type":"koral:term",
+      "layer":"orth",
+      "key":"der",
+      "match":"match:eq",	
+      "foundry":"opennlp"
+    }
+  },
+  "collection":{
+    "value":"Goe:th=e",
+    "match":"match:eq",
+    "type":"type:regex",
+    "key":"author",
+    "@type":"koral:doc"
+  },
+  "meta":{
+    "cutOff":null
+  }
+}