diff --git a/rpc/types_test.go b/rpc/types_test.go
index 7ef4475f8d..55a23f10f1 100644
--- a/rpc/types_test.go
+++ b/rpc/types_test.go
@@ -19,6 +19,7 @@ package rpc
 import (
 	"encoding/json"
 	"testing"
+	"reflect"
 
 	"github.com/dominant-strategies/go-quai/common"
 	"github.com/dominant-strategies/go-quai/common/math"
@@ -122,3 +123,33 @@ func TestBlockNumberOrHash_UnmarshalJSON(t *testing.T) {
 		}
 	}
 }
+
+func TestBlockNumberOrHash_WithNumber_MarshalAndUnmarshal(t *testing.T) {
+	tests := []struct {
+		name   string
+		number int64
+	}{
+		{"max", math.MaxInt64},
+		{"pending", int64(PendingBlockNumber)},
+		{"latest", int64(LatestBlockNumber)},
+		{"earliest", int64(EarliestBlockNumber)},
+	}
+	for _, test := range tests {
+		test := test
+		t.Run(test.name, func(t *testing.T) {
+			bnh := BlockNumberOrHashWithNumber(BlockNumber(test.number))
+			marshalled, err := json.Marshal(bnh)
+			if err != nil {
+				t.Fatal("cannot marshal:", err)
+			}
+			var unmarshalled BlockNumberOrHash
+			err = json.Unmarshal(marshalled, &unmarshalled)
+			if err != nil {
+				t.Fatal("cannot unmarshal:", err)
+			}
+			if !reflect.DeepEqual(bnh, unmarshalled) {
+				t.Fatalf("wrong result: expected %v, got %v", bnh, unmarshalled)
+			}
+		})
+	}
+}