diff --git a/coinjoin/coinjoin.go b/coinjoin/coinjoin.go
index eabd5a5..12ef9d9 100644
--- a/coinjoin/coinjoin.go
+++ b/coinjoin/coinjoin.go
@@ -311,7 +311,8 @@ func verifyOutput(c Caller, outpoint *wire.OutPoint, value int64) error {
 	ctx, cancel := context.WithTimeout(context.Background(), rpcTimeout)
 	defer cancel()
 	var res struct {
-		Value float64 `json:"value"`
+		Value         float64 `json:"value"`
+		Confirmations int64   `json:"confirmations"`
 	}
 	err := c.Call(ctx, "gettxout", &res, outpoint.Hash.String(), outpoint.Index, outpoint.Tree)
 	if err != nil {
@@ -323,6 +324,12 @@ func verifyOutput(c Caller, outpoint *wire.OutPoint, value int64) error {
 			nil,
 		}
 	}
+	if res.Confirmations <= 0 {
+		return &blameError{
+			fmt.Sprintf("output %v has not been confirmed", outpoint),
+			nil,
+		}
+	}
 	return nil
 }
 
diff --git a/integration/honest_test.go b/integration/honest_test.go
index 6fb0ebb..16ee136 100644
--- a/integration/honest_test.go
+++ b/integration/honest_test.go
@@ -39,7 +39,7 @@ var inputValueJSON []byte
 func TestMain(m *testing.M) {
 	flag.Parse()
 	inputValue = int64(*mFlag) + 1
-	inputValueJSON = []byte(fmt.Sprintf(`{"value":%v}`, inputValue))
+	inputValueJSON = []byte(fmt.Sprintf(`{"value":%v,"confirmations":1}`, inputValue))
 	os.Exit(m.Run())
 }