diff --git a/spec/09_keyspace_sets_spec.coffee b/spec/09_keyspace_sets_spec.coffee
index 146dea7..742a0b5 100644
--- a/spec/09_keyspace_sets_spec.coffee
+++ b/spec/09_keyspace_sets_spec.coffee
@@ -151,4 +151,18 @@ describe 'redis-keyspace prefix for sets', () ->
         expect(reply.length).toEqual(4)
         expect(_.intersect(reply,['five','six','seven','eight']).length).toEqual(4)
         done()
+      )
+  it 'should union sets and store results with sunionstore', () ->
+    runBlock 'sunionstore', (done) ->
+      client2.sunionstore('newset','myset','myset2', testAsync (error,reply) ->
+        expect(error).toBeNull()
+        expect(reply).toEqual(4)
+        done()
+      )
+    runBlock 'smembers to confirm sunionstore', (done) ->
+      client2.smembers('newset', testAsync (error,reply) ->
+        expect(error).toBeNull()
+        expect(reply.length).toEqual(4)
+        expect(_.intersect(reply,['five','six','seven','eight']).length).toEqual(4)
+        done()
       )
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