diff --git a/Tests/FlowAccessAPIOnSandboxTests.swift b/Tests/FlowAccessAPIOnPreviewnetTests.swift
similarity index 83%
rename from Tests/FlowAccessAPIOnSandboxTests.swift
rename to Tests/FlowAccessAPIOnPreviewnetTests.swift
index 444862a..afba5bb 100644
--- a/Tests/FlowAccessAPIOnSandboxTests.swift
+++ b/Tests/FlowAccessAPIOnPreviewnetTests.swift
@@ -11,13 +11,13 @@ import CryptoKit
 import Foundation
 import XCTest
 
-final class FlowAccessAPIOnSandboxTests: XCTestCase {
+final class FlowAccessAPIOnPreviewnetTests: XCTestCase {
     var flowAPI: FlowAccessProtocol!
 
     override func setUp() {
         super.setUp()
-        flowAPI = flow.createHTTPAccessAPI(chainID: .sandboxnet)
-        flow.configure(chainID: .sandboxnet)
+        flowAPI = flow.createHTTPAccessAPI(chainID: .previewnet)
+        flow.configure(chainID: .previewnet)
     }
 
     func testFlowPing() async throws {
@@ -27,7 +27,7 @@ final class FlowAccessAPIOnSandboxTests: XCTestCase {
 
     func testNetworkParameters() async throws {
         let chainID = try await flowAPI.getNetworkParameters()
-        XCTAssertEqual(chainID, Flow.ChainID.sandboxnet)
+        XCTAssertEqual(chainID, Flow.ChainID.previewnet)
     }
 
     func testFlowAccount() async throws {
diff --git a/Tests/FlowAddressTest.swift b/Tests/FlowAddressTest.swift
index 263f95a..a65c312 100644
--- a/Tests/FlowAddressTest.swift
+++ b/Tests/FlowAddressTest.swift
@@ -24,10 +24,10 @@ final class FlowAddressTest: XCTestCase {
         XCTAssertEqual(true, isVaild)
     }
 
-    func testAddressHexTypeSandboxnet() async throws {
-        let isVaild = await flow.isAddressVaildate(address: "0x4e8e130b4fb9aee2", network: .sandboxnet)
-        XCTAssertEqual(true, isVaild)
-    }
+//    func testAddressHexTypeSandboxnet() async throws {
+//        let isVaild = await flow.isAddressVaildate(address: "0x4e8e130b4fb9aee2", network: .sandboxnet)
+//        XCTAssertEqual(true, isVaild)
+//    }
 
     func testAddressHexTypeTestnet() async throws {
         let isVaild = await flow.isAddressVaildate(address: "0xc6de0d94160377cd", network: .testnet)