diff --git a/pkg/vm/vm_ops_stackmani_test.go b/pkg/vm/vm_ops_stackmani_test.go
index 45e84ddb7..eb9bf9a91 100644
--- a/pkg/vm/vm_ops_stackmani_test.go
+++ b/pkg/vm/vm_ops_stackmani_test.go
@@ -149,49 +149,3 @@ func TestPickOp(t *testing.T) {
 	assert.Equal(t, int64(3), itemA2.Value().Int64())
 
 }
-
-/*
-func TestXswapOp(t *testing.T) {
-
-	v := VM{}
-
-	sert.Nil(t, err)
-
-	ctx := stack.NewContext([]byte{})
-	ctx.Estack.Push(a).Push(b).Push(c).Push(d)
-
-	// pop n (= d = 2) from the stack.
-	// we wa, err := stack.NewInt(big.NewInt(3))
-	assert.Nil(t, err)
-
-	b, err := stack.NewInt(big.NewInt(6))
-	assert.Nil(t, err)
-
-	c, err := stack.NewInt(big.NewInt(9))
-	assert.Nil(t, err)
-
-	d, err := stack.NewInt(big.NewInt(2))
-	asill swap the n-item which
-	// is located in position len(stack)-n-1 (= 3-2-1= 0)
-	// with the top stack item.
-	// The final stack will be [c,b,a]
-	v.executeOp(stack.XSWAP, ctx)
-
-	// Stack should have three items
-	assert.Equal(t, 3, ctx.Estack.Len())
-
-	itemA, err := ctx.Estack.PopInt()
-	assert.Nil(t, err)
-
-	itemB, err := ctx.Estack.PopInt()
-	assert.Nil(t, err)
-
-	itemC, err := ctx.Estack.PopInt()
-	assert.Nil(t, err)
-
-	assert.Equal(t, int64(3), itemA.Value().Int64())
-	assert.Equal(t, int64(6), itemB.Value().Int64())
-	assert.Equal(t, int64(9), itemC.Value().Int64())
-
-}
-*/