diff --git a/Tests/HummingbirdCoreTests/CoreTests.swift b/Tests/HummingbirdCoreTests/CoreTests.swift
index 9ab463a3..e2e2ffdd 100644
--- a/Tests/HummingbirdCoreTests/CoreTests.swift
+++ b/Tests/HummingbirdCoreTests/CoreTests.swift
@@ -24,7 +24,7 @@ import NIOPosix
 import ServiceLifecycle
 import XCTest
 
-class HummingBirdCoreTests: XCTestCase {
+final class HummingBirdCoreTests: XCTestCase {
     static let eventLoopGroup: EventLoopGroup = {
         #if os(iOS)
         NIOTSEventLoopGroup.singleton
diff --git a/Tests/HummingbirdCoreTests/HTTP2Tests.swift b/Tests/HummingbirdCoreTests/HTTP2Tests.swift
index 33e051c1..ff9e30a5 100644
--- a/Tests/HummingbirdCoreTests/HTTP2Tests.swift
+++ b/Tests/HummingbirdCoreTests/HTTP2Tests.swift
@@ -24,7 +24,7 @@ import NIOSSL
 import NIOTransportServices
 import XCTest
 
-class HummingBirdHTTP2Tests: XCTestCase {
+final class HummingBirdHTTP2Tests: XCTestCase {
     func testConnect() async throws {
         let eventLoopGroup = MultiThreadedEventLoopGroup(numberOfThreads: 2)
         defer { XCTAssertNoThrow(try eventLoopGroup.syncShutdownGracefully()) }
diff --git a/Tests/HummingbirdCoreTests/TLSTests.swift b/Tests/HummingbirdCoreTests/TLSTests.swift
index 5ebc1b7b..c4b8885c 100644
--- a/Tests/HummingbirdCoreTests/TLSTests.swift
+++ b/Tests/HummingbirdCoreTests/TLSTests.swift
@@ -23,7 +23,7 @@ import NIOSSL
 import NIOTransportServices
 import XCTest
 
-class HummingBirdTLSTests: XCTestCase {
+final class HummingBirdTLSTests: XCTestCase {
     func testConnect() async throws {
         let eventLoopGroup = MultiThreadedEventLoopGroup(numberOfThreads: 2)
         defer { XCTAssertNoThrow(try eventLoopGroup.syncShutdownGracefully()) }
diff --git a/Tests/HummingbirdCoreTests/TSTests.swift b/Tests/HummingbirdCoreTests/TSTests.swift
index 25bc04ec..c6a0c3ae 100644
--- a/Tests/HummingbirdCoreTests/TSTests.swift
+++ b/Tests/HummingbirdCoreTests/TSTests.swift
@@ -23,7 +23,7 @@ import NIOSSL
 import NIOTransportServices
 import XCTest
 
-class TransportServicesTests: XCTestCase {
+final class TransportServicesTests: XCTestCase {
     func randomBuffer(size: Int) -> ByteBuffer {
         var data = [UInt8](repeating: 0, count: size)
         data = data.map { _ in UInt8.random(in: 0...255) }
diff --git a/Tests/HummingbirdTests/CookiesTests.swift b/Tests/HummingbirdTests/CookiesTests.swift
index c3b53136..b78e5938 100644
--- a/Tests/HummingbirdTests/CookiesTests.swift
+++ b/Tests/HummingbirdTests/CookiesTests.swift
@@ -16,7 +16,7 @@
 import HummingbirdTesting
 import XCTest
 
-class CookieTests: XCTestCase {
+final class CookieTests: XCTestCase {
     func testNameValue() {
         let cookie = Cookie(from: "name=value")
         XCTAssertEqual(cookie?.name, "name")
diff --git a/Tests/HummingbirdTests/DateCacheTests.swift b/Tests/HummingbirdTests/DateCacheTests.swift
index 5c0a17d0..ddd425b5 100644
--- a/Tests/HummingbirdTests/DateCacheTests.swift
+++ b/Tests/HummingbirdTests/DateCacheTests.swift
@@ -17,7 +17,7 @@ import Foundation
 import HummingbirdTesting
 import XCTest
 
-class HummingbirdDateTests: XCTestCase {
+final class HummingbirdDateTests: XCTestCase {
     func testRFC1123Renderer() {
         let formatter = DateFormatter()
         formatter.locale = Locale(identifier: "en_US_POSIX")
diff --git a/Tests/HummingbirdTests/FileIOTests.swift b/Tests/HummingbirdTests/FileIOTests.swift
index c5b63a85..10dd2535 100644
--- a/Tests/HummingbirdTests/FileIOTests.swift
+++ b/Tests/HummingbirdTests/FileIOTests.swift
@@ -16,7 +16,7 @@ import Hummingbird
 import HummingbirdTesting
 import XCTest
 
-class FileIOTests: XCTestCase {
+final class FileIOTests: XCTestCase {
     static func randomBuffer(size: Int) -> ByteBuffer {
         var data = [UInt8](repeating: 0, count: size)
         data = data.map { _ in UInt8.random(in: 0...255) }
diff --git a/Tests/HummingbirdTests/FileMiddlewareTests.swift b/Tests/HummingbirdTests/FileMiddlewareTests.swift
index e6581066..e7edb39e 100644
--- a/Tests/HummingbirdTests/FileMiddlewareTests.swift
+++ b/Tests/HummingbirdTests/FileMiddlewareTests.swift
@@ -18,7 +18,7 @@ import Hummingbird
 import HummingbirdTesting
 import XCTest
 
-class FileMiddlewareTests: XCTestCase {
+final class FileMiddlewareTests: XCTestCase {
     static func randomBuffer(size: Int) -> ByteBuffer {
         var data = [UInt8](repeating: 0, count: size)
         data = data.map { _ in UInt8.random(in: 0...255) }
diff --git a/Tests/HummingbirdTests/HTTPTests.swift b/Tests/HummingbirdTests/HTTPTests.swift
index 0d1cf29c..7635a072 100644
--- a/Tests/HummingbirdTests/HTTPTests.swift
+++ b/Tests/HummingbirdTests/HTTPTests.swift
@@ -16,7 +16,7 @@ import Hummingbird
 import HummingbirdCore
 import XCTest
 
-class HTTPTests: XCTestCase {
+final class HTTPTests: XCTestCase {
     func testURI<T: Equatable>(_ uri: URI, _ component: KeyPath<URI, T>, _ value: T) {
         XCTAssertEqual(uri[keyPath: component], value)
     }
diff --git a/Tests/HummingbirdTests/HummingBirdJSONTests.swift b/Tests/HummingbirdTests/HummingBirdJSONTests.swift
index 93fc1528..1f3270bf 100644
--- a/Tests/HummingbirdTests/HummingBirdJSONTests.swift
+++ b/Tests/HummingbirdTests/HummingBirdJSONTests.swift
@@ -17,7 +17,7 @@ import HummingbirdTesting
 import Logging
 import XCTest
 
-class HummingbirdJSONTests: XCTestCase {
+final class HummingbirdJSONTests: XCTestCase {
     struct User: ResponseCodable {
         let name: String
         let email: String
diff --git a/Tests/HummingbirdTests/TrieRouterTests.swift b/Tests/HummingbirdTests/TrieRouterTests.swift
index 5cdc9e4e..329bdc21 100644
--- a/Tests/HummingbirdTests/TrieRouterTests.swift
+++ b/Tests/HummingbirdTests/TrieRouterTests.swift
@@ -15,7 +15,7 @@
 @testable @_spi(Internal) import Hummingbird
 import XCTest
 
-class TrieRouterTests: XCTestCase {
+final class TrieRouterTests: XCTestCase {
     func testPathComponentsTrie() {
         let trieBuilder = RouterPathTrieBuilder<String>()
         trieBuilder.addEntry("/usr/local/bin", value: "test1")
diff --git a/Tests/HummingbirdTests/URLEncodedForm/Application+URLEncodedFormTests.swift b/Tests/HummingbirdTests/URLEncodedForm/Application+URLEncodedFormTests.swift
index 4245ba3b..2cb589f1 100644
--- a/Tests/HummingbirdTests/URLEncodedForm/Application+URLEncodedFormTests.swift
+++ b/Tests/HummingbirdTests/URLEncodedForm/Application+URLEncodedFormTests.swift
@@ -18,7 +18,7 @@ import Logging
 import NIOCore
 import XCTest
 
-class HummingBirdURLEncodedTests: XCTestCase {
+final class HummingBirdURLEncodedTests: XCTestCase {
     struct User: ResponseCodable {
         let name: String
         let email: String
diff --git a/Tests/HummingbirdTests/URLEncodedForm/URLDecoderTests.swift b/Tests/HummingbirdTests/URLEncodedForm/URLDecoderTests.swift
index 3768aa1e..8da4f379 100644
--- a/Tests/HummingbirdTests/URLEncodedForm/URLDecoderTests.swift
+++ b/Tests/HummingbirdTests/URLEncodedForm/URLDecoderTests.swift
@@ -15,7 +15,7 @@
 @testable import Hummingbird
 import XCTest
 
-class URLDecodedFormDecoderTests: XCTestCase {
+final class URLDecodedFormDecoderTests: XCTestCase {
     func testForm<Input: Decodable & Equatable>(_ value: Input, query: String, decoder: URLEncodedFormDecoder = .init()) {
         do {
             let value2 = try decoder.decode(Input.self, from: query)
diff --git a/Tests/HummingbirdTests/URLEncodedForm/URLEncodedNodeTests.swift b/Tests/HummingbirdTests/URLEncodedForm/URLEncodedNodeTests.swift
index 33df91e6..c9c51f92 100644
--- a/Tests/HummingbirdTests/URLEncodedForm/URLEncodedNodeTests.swift
+++ b/Tests/HummingbirdTests/URLEncodedForm/URLEncodedNodeTests.swift
@@ -15,7 +15,7 @@
 @testable import Hummingbird
 import XCTest
 
-class URLEncodedFormNodeTests: XCTestCase {
+final class URLEncodedFormNodeTests: XCTestCase {
     static func XCTAssertEncodedEqual(_ lhs: String, _ rhs: String) {
         let lhs = lhs.split(separator: "&")
             .sorted { $0 < $1 }
diff --git a/Tests/HummingbirdTests/URLEncodedForm/URLEncoderTests.swift b/Tests/HummingbirdTests/URLEncodedForm/URLEncoderTests.swift
index 71bae7c5..4f638d2f 100644
--- a/Tests/HummingbirdTests/URLEncodedForm/URLEncoderTests.swift
+++ b/Tests/HummingbirdTests/URLEncodedForm/URLEncoderTests.swift
@@ -15,7 +15,7 @@
 import Hummingbird
 import XCTest
 
-class URLEncodedFormEncoderTests: XCTestCase {
+final class URLEncodedFormEncoderTests: XCTestCase {
     static func XCTAssertEncodedEqual(_ lhs: String, _ rhs: String) {
         let lhs = lhs.split(separator: "&")
             .sorted { $0 < $1 }
diff --git a/Tests/HummingbirdTests/UtilsTests.swift b/Tests/HummingbirdTests/UtilsTests.swift
index f1e94992..a4aea091 100644
--- a/Tests/HummingbirdTests/UtilsTests.swift
+++ b/Tests/HummingbirdTests/UtilsTests.swift
@@ -15,7 +15,7 @@
 import HummingbirdCore
 import XCTest
 
-class FlatDictionaryTests: XCTestCase {
+final class FlatDictionaryTests: XCTestCase {
     func testLiteralInit() {
         let a: FlatDictionary<String, String> = ["test": "value", "key2": "value2"]
         XCTAssertEqual(a["test"], "value")