diff --git a/src/test/java/de/ids_mannheim/korap/search/TestKorapSearch.java b/src/test/java/de/ids_mannheim/korap/search/TestKorapSearch.java
index 023ad9a..c06592d 100644
--- a/src/test/java/de/ids_mannheim/korap/search/TestKorapSearch.java
+++ b/src/test/java/de/ids_mannheim/korap/search/TestKorapSearch.java
@@ -471,6 +471,26 @@
 
 
     @Test
+    public void searchJSONbug () throws IOException {
+
+	// Construct index
+	KorapIndex ki = new KorapIndex();
+	// Indexing test files
+	for (String i : new String[] {"00001", "00002", "00003", "00004", "00005", "00006", "02439"}) {
+	    ki.addDocFile(
+	      getClass().getResource("/wiki/" + i + ".json.gz").getFile(), true
+            );
+	};
+	ki.commit();
+
+	String json = getString(getClass().getResource("/queries/bsp-bug.jsonld").getFile());
+
+	KorapResult kr = new KorapSearch(json).run(ki);
+	assertEquals(kr.getError(), "Operation needs exactly two operands");
+    };
+
+
+    @Test
     public void getFoundryDistribution () throws Exception {
 
 	// Construct index
diff --git a/src/test/resources/queries/bsp-bug.jsonld b/src/test/resources/queries/bsp-bug.jsonld
new file mode 100644
index 0000000..33bb904
--- /dev/null
+++ b/src/test/resources/queries/bsp-bug.jsonld
@@ -0,0 +1,15 @@
+{
+  "@context": "http://ids-mannheim.de/ns/KorAP/json-ld/v0.1/context.jsonld",
+  "query": {
+    "@type": "korap:group",
+    "operation" : "operation:submatch",
+    "classRef" : [0],
+    "operands" : []
+  },
+  "meta":{
+    "context":{
+      "left":["char",90],
+      "right":["char",90]
+    }
+  }  
+}