diff --git a/Package.swift b/Package.swift
index 96ea89e..342f058 100644
--- a/Package.swift
+++ b/Package.swift
@@ -1,4 +1,4 @@
-// swift-tools-version:5.3
+// swift-tools-version:5.5
 import PackageDescription
 
 let package = Package(
diff --git a/Tests/MockUserDefaultsSwiftTests/MockUserDefaultsSwiftTests.swift b/Tests/MockUserDefaultsSwiftTests/MockUserDefaultsSwiftTests.swift
index b7c2b42..6946d6c 100644
--- a/Tests/MockUserDefaultsSwiftTests/MockUserDefaultsSwiftTests.swift
+++ b/Tests/MockUserDefaultsSwiftTests/MockUserDefaultsSwiftTests.swift
@@ -35,7 +35,7 @@ class MockUserDefaultsSwiftTests: XCTestCase {
     }
 
     func testObject() {
-        // XCTAssertNil(userDefaults.object(forKey: testKey))
+        XCTAssertNil(userDefaults.object(forKey: testKey))
 
         userDefaults.set("string", forKey: testKey)
         XCTAssertEqual(userDefaults.object(forKey: testKey) as? String, "string")
@@ -45,7 +45,7 @@ class MockUserDefaultsSwiftTests: XCTestCase {
     }
 
     func testString() {
-        // XCTAssertNil(userDefaults.string(forKey: testKey))
+        XCTAssertNil(userDefaults.string(forKey: testKey))
 
         userDefaults.set("string", forKey: testKey)
         XCTAssertEqual(userDefaults.string(forKey: testKey), "string")
@@ -86,12 +86,12 @@ class MockUserDefaultsSwiftTests: XCTestCase {
     }
 
     func testArray() {
-        // XCTAssertNil(userDefaults.array(forKey: testKey))
+        XCTAssertNil(userDefaults.array(forKey: testKey))
 
-        userDefaults.set([], forKey: testKey)
+        userDefaults.set([] as [Any], forKey: testKey)
         XCTAssertEqual(userDefaults.array(forKey: testKey)?.isEmpty, true)
 
-        userDefaults.set(["string", 10], forKey:testKey)
+        userDefaults.set(["string", 10] as [Any], forKey:testKey)
         XCTAssertEqual(userDefaults.array(forKey: testKey)?.count, 2)
         XCTAssertEqual(userDefaults.array(forKey: testKey)?[0] as? String, "string")
         XCTAssertEqual(userDefaults.array(forKey: testKey)?[1] as? Int, 10)
@@ -101,12 +101,12 @@ class MockUserDefaultsSwiftTests: XCTestCase {
     }
 
     func testDictionary() {
-        // XCTAssertNil(userDefaults.dictionary(forKey: testKey))
+        XCTAssertNil(userDefaults.dictionary(forKey: testKey))
 
-        userDefaults.set([:], forKey:testKey)
+        userDefaults.set([:] as [AnyHashable: Any], forKey:testKey)
         XCTAssertEqual(userDefaults.dictionary(forKey: testKey)?.isEmpty, true)
 
-        userDefaults.set(["string": "string", "int" : 10], forKey:testKey)
+        userDefaults.set(["string": "string", "int" : 10] as [AnyHashable: Any], forKey:testKey)
         XCTAssertEqual(userDefaults.dictionary(forKey: testKey)?.count, 2)
         XCTAssertEqual(userDefaults.dictionary(forKey: testKey)?["string"] as? String, "string")
         XCTAssertEqual(userDefaults.dictionary(forKey: testKey)?["int"] as? Int, 10)
@@ -116,15 +116,15 @@ class MockUserDefaultsSwiftTests: XCTestCase {
     }
 
     func testStringArray() {
-        // XCTAssertNil(userDefaults.stringArray(forKey: testKey))
+        XCTAssertNil(userDefaults.stringArray(forKey: testKey))
 
-        userDefaults.set([], forKey: testKey)
+        userDefaults.set([] as [Any], forKey: testKey)
         XCTAssertEqual(userDefaults.stringArray(forKey: testKey), [])
 
         userDefaults.set(["string"], forKey:testKey)
         XCTAssertEqual(userDefaults.stringArray(forKey: testKey), ["string"])
 
-        userDefaults.set(["string", 10], forKey:testKey)
+        userDefaults.set(["string", 10] as [Any], forKey:testKey)
         XCTAssertNil(userDefaults.stringArray(forKey: testKey))
 
         userDefaults.set("not an array", forKey: testKey)
@@ -137,7 +137,7 @@ class MockUserDefaultsSwiftTests: XCTestCase {
             return Data(base64Encoded: base64, options: .ignoreUnknownCharacters)
         }
 
-        // XCTAssertNil(userDefaults.data(forKey: testKey))
+        XCTAssertNil(userDefaults.data(forKey: testKey))
 
         let data = createData()
         XCTAssertNotNil(data)
@@ -149,7 +149,7 @@ class MockUserDefaultsSwiftTests: XCTestCase {
     }
 
     func testUrl() {
-        // XCTAssertNil(userDefaults.url(forKey: testKey))
+        XCTAssertNil(userDefaults.url(forKey: testKey))
 
         let url = URL(string: "https://github.com/")
         XCTAssertNotNil(url)