diff --git a/src/test/java/de/ids_mannheim/korap/test/cosmas2/Cosmas2QueryProcessorTest.java b/src/test/java/de/ids_mannheim/korap/test/cosmas2/Cosmas2QueryProcessorTest.java
index 01ff0d3..bb4319c 100644
--- a/src/test/java/de/ids_mannheim/korap/test/cosmas2/Cosmas2QueryProcessorTest.java
+++ b/src/test/java/de/ids_mannheim/korap/test/cosmas2/Cosmas2QueryProcessorTest.java
@@ -630,13 +630,31 @@
                 .asText());
         assertFalse(res.at("/query/inOrder").asBoolean());
         
-        // 15.01.24/FB
+        // 15.01.24/FB: checking syntax error detectiong:
+        
         query = "Sonne /+w Mond"; // distance value missing.
         qs.setQuery(query, "cosmas2");
         res = mapper.readTree(qs.toJSON());
         
         assertTrue(res.get("errors") != null);
         
+        query = "Sonne /+2sw Mond"; // 2 distance types instead of 1.
+        qs.setQuery(query, "cosmas2");
+        res = mapper.readTree(qs.toJSON());
+        
+        assertTrue(res.get("errors") != null);
+        
+        query = "Sonne /+2s- Mond"; // 2 distance directions instead of 1.
+        qs.setQuery(query, "cosmas2");
+        res = mapper.readTree(qs.toJSON());
+        
+        assertTrue(res.get("errors") != null);
+
+        query = "Sonne /+2s7 Mond"; // 2 distance values instead of 1.
+        qs.setQuery(query, "cosmas2");
+        res = mapper.readTree(qs.toJSON());
+        
+        assertTrue(res.get("errors") != null);
     }