diff --git a/Tests/SotoTests/AWSRequestTests.swift b/Tests/SotoTests/AWSRequestTests.swift
index d5a71f67c3..714537242c 100644
--- a/Tests/SotoTests/AWSRequestTests.swift
+++ b/Tests/SotoTests/AWSRequestTests.swift
@@ -40,7 +40,7 @@ extension AWSHTTPBody {
 
 /// Tests to check the formatting of various AWSHTTPRequest bodies
 class AWSHTTPRequestTests: XCTestCase {
-    static let client = AWSClient(credentialProvider: TestEnvironment.credentialProvider, middleware: TestEnvironment.middlewares, httpClientProvider: .createNew)
+    static let client = AWSClient(credentialProvider: TestEnvironment.credentialProvider, middleware: TestEnvironment.middlewares)
 
     /// test AWSHTTPRequest body is expected string
     func testRequestedBody(expected: String, result: AWSHTTPRequest) throws {
diff --git a/Tests/SotoTests/Services/APIGateway/APIGatewayTests.swift b/Tests/SotoTests/Services/APIGateway/APIGatewayTests.swift
index 7852db2e93..4489103b3a 100644
--- a/Tests/SotoTests/Services/APIGateway/APIGatewayTests.swift
+++ b/Tests/SotoTests/Services/APIGateway/APIGatewayTests.swift
@@ -33,7 +33,6 @@ class APIGatewayTests: XCTestCase {
         Self.client = AWSClient(
             credentialProvider: TestEnvironment.credentialProvider,
             middleware: TestEnvironment.middlewares,
-            httpClientProvider: .createNew,
             logger: TestEnvironment.logger
         )
         Self.apiGateway = APIGateway(
diff --git a/Tests/SotoTests/Services/ApiGatewayV2/APIGatewayV2Tests.swift b/Tests/SotoTests/Services/ApiGatewayV2/APIGatewayV2Tests.swift
index f14760c902..34beb2c893 100644
--- a/Tests/SotoTests/Services/ApiGatewayV2/APIGatewayV2Tests.swift
+++ b/Tests/SotoTests/Services/ApiGatewayV2/APIGatewayV2Tests.swift
@@ -31,7 +31,6 @@ class APIGatewayV2Tests: XCTestCase {
         Self.client = AWSClient(
             credentialProvider: TestEnvironment.credentialProvider,
             middleware: TestEnvironment.middlewares,
-            httpClientProvider: .createNew,
             logger: TestEnvironment.logger
         )
         Self.apiGatewayV2 = ApiGatewayV2(
diff --git a/Tests/SotoTests/Services/CloudTrail/CloudTrailTests.swift b/Tests/SotoTests/Services/CloudTrail/CloudTrailTests.swift
index c240292ab3..0e6f7e3fb9 100644
--- a/Tests/SotoTests/Services/CloudTrail/CloudTrailTests.swift
+++ b/Tests/SotoTests/Services/CloudTrail/CloudTrailTests.swift
@@ -20,7 +20,7 @@ class CloudTrailTests: XCTestCase {
     static var cloudTrail: CloudTrail!
 
     override class func setUp() {
-        Self.client = AWSClient(credentialProvider: TestEnvironment.credentialProvider, middleware: TestEnvironment.middlewares, httpClientProvider: .createNew)
+        Self.client = AWSClient(credentialProvider: TestEnvironment.credentialProvider, middleware: TestEnvironment.middlewares)
         Self.cloudTrail = CloudTrail(
             client: CloudTrailTests.client,
             region: .euwest1,
diff --git a/Tests/SotoTests/Services/DynamoDB/DynamoDBTests.swift b/Tests/SotoTests/Services/DynamoDB/DynamoDBTests.swift
index f7ce6360df..049afd9794 100644
--- a/Tests/SotoTests/Services/DynamoDB/DynamoDBTests.swift
+++ b/Tests/SotoTests/Services/DynamoDB/DynamoDBTests.swift
@@ -31,7 +31,7 @@ class DynamoDBTests: XCTestCase {
             print("Connecting to AWS")
         }
 
-        Self.client = AWSClient(credentialProvider: TestEnvironment.credentialProvider, middleware: TestEnvironment.middlewares, httpClientProvider: .createNew)
+        Self.client = AWSClient(credentialProvider: TestEnvironment.credentialProvider, middleware: TestEnvironment.middlewares)
         Self.dynamoDB = DynamoDB(
             client: DynamoDBTests.client,
             region: .useast1,
diff --git a/Tests/SotoTests/Services/EC2/EC2Tests.swift b/Tests/SotoTests/Services/EC2/EC2Tests.swift
index 64e08b9229..715486c066 100644
--- a/Tests/SotoTests/Services/EC2/EC2Tests.swift
+++ b/Tests/SotoTests/Services/EC2/EC2Tests.swift
@@ -30,7 +30,7 @@ class EC2Tests: XCTestCase {
             print("Connecting to AWS")
         }
 
-        Self.client = AWSClient(credentialProvider: TestEnvironment.credentialProvider, middleware: TestEnvironment.middlewares, httpClientProvider: .createNew)
+        Self.client = AWSClient(credentialProvider: TestEnvironment.credentialProvider, middleware: TestEnvironment.middlewares)
         Self.ec2 = EC2(
             client: EC2Tests.client,
             region: .useast1,
diff --git a/Tests/SotoTests/Services/Glacier/GlacierTests.swift b/Tests/SotoTests/Services/Glacier/GlacierTests.swift
index 750ebc2410..702c9b904c 100644
--- a/Tests/SotoTests/Services/Glacier/GlacierTests.swift
+++ b/Tests/SotoTests/Services/Glacier/GlacierTests.swift
@@ -22,7 +22,7 @@ class GlacierTests: XCTestCase {
     static var glacier: Glacier!
 
     override class func setUp() {
-        Self.client = AWSClient(credentialProvider: TestEnvironment.credentialProvider, middleware: TestEnvironment.middlewares, httpClientProvider: .createNew)
+        Self.client = AWSClient(credentialProvider: TestEnvironment.credentialProvider, middleware: TestEnvironment.middlewares)
         Self.glacier = Glacier(
             client: GlacierTests.client,
             region: .euwest1,
diff --git a/Tests/SotoTests/Services/IAM/IAMTests.swift b/Tests/SotoTests/Services/IAM/IAMTests.swift
index a4029a1160..313c9ae601 100644
--- a/Tests/SotoTests/Services/IAM/IAMTests.swift
+++ b/Tests/SotoTests/Services/IAM/IAMTests.swift
@@ -29,7 +29,7 @@ class IAMTests: XCTestCase {
             print("Connecting to AWS")
         }
 
-        Self.client = AWSClient(credentialProvider: TestEnvironment.credentialProvider, middleware: TestEnvironment.middlewares, httpClientProvider: .createNew)
+        Self.client = AWSClient(credentialProvider: TestEnvironment.credentialProvider, middleware: TestEnvironment.middlewares)
         Self.iam = IAM(
             client: IAMTests.client,
             endpoint: TestEnvironment.getEndPoint(environment: "LOCALSTACK_ENDPOINT")
diff --git a/Tests/SotoTests/Services/Lambda/LambdaTests.swift b/Tests/SotoTests/Services/Lambda/LambdaTests.swift
index f12d82e32e..550befeff9 100644
--- a/Tests/SotoTests/Services/Lambda/LambdaTests.swift
+++ b/Tests/SotoTests/Services/Lambda/LambdaTests.swift
@@ -105,8 +105,7 @@ class LambdaTests: XCTestCase {
 
         Self.client = AWSClient(
             credentialProvider: TestEnvironment.credentialProvider,
-            middleware: TestEnvironment.middlewares,
-            httpClientProvider: .createNew
+            middleware: TestEnvironment.middlewares
         )
         Self.lambda = Lambda(
             client: LambdaTests.client,
diff --git a/Tests/SotoTests/Services/S3/S3ExtensionTests.swift b/Tests/SotoTests/Services/S3/S3ExtensionTests.swift
index 07520e3a3c..2ad22faa46 100644
--- a/Tests/SotoTests/Services/S3/S3ExtensionTests.swift
+++ b/Tests/SotoTests/Services/S3/S3ExtensionTests.swift
@@ -392,8 +392,7 @@ extension S3Tests {
             credentialProvider: .static(
                 accessKeyId: "AKIAIOSFODNN7EXAMPLE",
                 secretAccessKey: "wJalrXUtnFEMI/K7MDENG/bPxRfiCYEXAMPLEKEY"
-            ),
-            httpClientProvider: .createNew
+            )
         )
         let s3 = S3(client: client, region: .useast1)
 
@@ -455,8 +454,7 @@ extension S3Tests {
             credentialProvider: .static(
                 accessKeyId: "AKIAIOSFODNN7EXAMPLE",
                 secretAccessKey: "wJalrXUtnFEMI/K7MDENG/bPxRfiCYEXAMPLEKEY"
-            ),
-            httpClientProvider: .createNew
+            )
         )
         let s3 = S3(client: client, region: .useast1)
 
@@ -485,8 +483,7 @@ extension S3Tests {
             credentialProvider: .static(
                 accessKeyId: "AKIAIOSFODNN7EXAMPLE",
                 secretAccessKey: "wJalrXUtnFEMI/K7MDENG/bPxRfiCYEXAMPLEKEY"
-            ),
-            httpClientProvider: .createNew
+            )
         )
         let s3 = S3(client: client, region: .useast1)
 
diff --git a/Tests/SotoTests/Services/S3/S3Tests.swift b/Tests/SotoTests/Services/S3/S3Tests.swift
index 235ecda2a6..408bd49667 100644
--- a/Tests/SotoTests/Services/S3/S3Tests.swift
+++ b/Tests/SotoTests/Services/S3/S3Tests.swift
@@ -23,7 +23,6 @@ import XCTest
 @testable import SotoS3Control
 
 class S3Tests: XCTestCase {
-    static var eventLoopGroup: EventLoopGroup!
     static var client: AWSClient!
     static var s3: S3!
     static var randomBytes: ByteBuffer!
@@ -35,11 +34,9 @@ class S3Tests: XCTestCase {
             print("Connecting to AWS")
         }
 
-        Self.eventLoopGroup = MultiThreadedEventLoopGroup(numberOfThreads: System.coreCount)
         Self.client = AWSClient(
             credentialProvider: TestEnvironment.credentialProvider,
-            middleware: TestEnvironment.middlewares,
-            httpClientProvider: .createNewWithEventLoopGroup(Self.eventLoopGroup)
+            middleware: TestEnvironment.middlewares
         )
         Self.s3 = S3(
             client: Self.client,
@@ -51,7 +48,6 @@ class S3Tests: XCTestCase {
 
     override class func tearDown() {
         XCTAssertNoThrow(try Self.client.syncShutdown())
-        XCTAssertNoThrow(try Self.eventLoopGroup.syncShutdownGracefully())
     }
 
     static func createRandomBuffer(size: Int) -> ByteBuffer {
@@ -407,8 +403,6 @@ class S3Tests: XCTestCase {
         try XCTSkipIf(TestEnvironment.isUsingLocalstack)
 
         let name = TestEnvironment.generateResourceName()
-        let httpClient = HTTPClient(eventLoopGroupProvider: .singleton)
-        defer { XCTAssertNoThrow(try httpClient.syncShutdown()) }
         let s3Url = URL(string: "https://\(name).s3.us-east-1.amazonaws.com/\(name)!=%25+/(*)_.txt")!
 
         try await testBucket(name) { _ in
@@ -417,14 +411,14 @@ class S3Tests: XCTestCase {
             var request = HTTPClientRequest(url: putURL.absoluteString)
             request.method = .PUT
             request.body = .bytes(byteBuffer)
-            let response = try await httpClient.execute(request, timeout: .minutes(1))
+            let response = try await HTTPClient.shared.execute(request, timeout: .minutes(1))
             XCTAssertEqual(response.status, .ok)
 
             let listResponse = try await Self.s3.listObjectsV2(.init(bucket: name))
             XCTAssertEqual(listResponse.contents?.first?.key, "\(name)!=%+/(*)_.txt")
 
             let getURL = try await Self.s3.signURL(url: s3Url, httpMethod: .GET, expires: .minutes(5))
-            let getResponse = try await httpClient.execute(.init(url: getURL.absoluteString), timeout: .minutes(1))
+            let getResponse = try await HTTPClient.shared.execute(.init(url: getURL.absoluteString), timeout: .minutes(1))
 
             let getBuffer = try await getResponse.body.collect(upTo: .max)
             XCTAssertEqual(response.status, .ok)
diff --git a/Tests/SotoTests/Services/SES/SESTests.swift b/Tests/SotoTests/Services/SES/SESTests.swift
index 292ae17aa9..70a720799c 100644
--- a/Tests/SotoTests/Services/SES/SESTests.swift
+++ b/Tests/SotoTests/Services/SES/SESTests.swift
@@ -28,7 +28,7 @@ class SESTests: XCTestCase {
             print("Connecting to AWS")
         }
 
-        Self.client = AWSClient(credentialProvider: TestEnvironment.credentialProvider, middleware: TestEnvironment.middlewares, httpClientProvider: .createNew)
+        Self.client = AWSClient(credentialProvider: TestEnvironment.credentialProvider, middleware: TestEnvironment.middlewares)
         Self.ses = SES(
             client: Self.client,
             region: .useast1,
diff --git a/Tests/SotoTests/Services/SNS/SNSTests.swift b/Tests/SotoTests/Services/SNS/SNSTests.swift
index 76da875b44..933431bb0b 100644
--- a/Tests/SotoTests/Services/SNS/SNSTests.swift
+++ b/Tests/SotoTests/Services/SNS/SNSTests.swift
@@ -28,7 +28,7 @@ class SNSTests: XCTestCase {
             print("Connecting to AWS")
         }
 
-        Self.client = AWSClient(credentialProvider: TestEnvironment.credentialProvider, middleware: TestEnvironment.middlewares, httpClientProvider: .createNew)
+        Self.client = AWSClient(credentialProvider: TestEnvironment.credentialProvider, middleware: TestEnvironment.middlewares)
         Self.sns = SNS(
             client: SNSTests.client,
             region: .useast1,
diff --git a/Tests/SotoTests/Services/SQS/SQSTests.swift b/Tests/SotoTests/Services/SQS/SQSTests.swift
index 97091bd6ce..a3d34ef6a6 100644
--- a/Tests/SotoTests/Services/SQS/SQSTests.swift
+++ b/Tests/SotoTests/Services/SQS/SQSTests.swift
@@ -28,7 +28,7 @@ class SQSTests: XCTestCase {
             print("Connecting to AWS")
         }
 
-        Self.client = AWSClient(credentialProvider: TestEnvironment.credentialProvider, middleware: TestEnvironment.middlewares, httpClientProvider: .createNew)
+        Self.client = AWSClient(credentialProvider: TestEnvironment.credentialProvider, middleware: TestEnvironment.middlewares)
         Self.sqs = SQS(
             client: SQSTests.client,
             region: .useast1,
diff --git a/Tests/SotoTests/Services/SSM/SSMTests.swift b/Tests/SotoTests/Services/SSM/SSMTests.swift
index bffcff5baa..982f6f4bb9 100644
--- a/Tests/SotoTests/Services/SSM/SSMTests.swift
+++ b/Tests/SotoTests/Services/SSM/SSMTests.swift
@@ -28,7 +28,7 @@ class SSMTests: XCTestCase {
             print("Connecting to AWS")
         }
 
-        Self.client = AWSClient(credentialProvider: TestEnvironment.credentialProvider, middleware: TestEnvironment.middlewares, httpClientProvider: .createNew)
+        Self.client = AWSClient(credentialProvider: TestEnvironment.credentialProvider, middleware: TestEnvironment.middlewares)
         Self.ssm = SSM(
             client: SSMTests.client,
             region: .useast1,
diff --git a/Tests/SotoTests/Services/STS/STSTests.swift b/Tests/SotoTests/Services/STS/STSTests.swift
index 5f4bf44ed1..287fcf9a4b 100644
--- a/Tests/SotoTests/Services/STS/STSTests.swift
+++ b/Tests/SotoTests/Services/STS/STSTests.swift
@@ -34,7 +34,6 @@ class STSTests: XCTestCase {
         Self.client = AWSClient(
             credentialProvider: TestEnvironment.credentialProvider,
             middleware: TestEnvironment.middlewares,
-            httpClientProvider: .createNew,
             logger: Logger(label: "Soto")
         )
         Self.sts = STS(
@@ -55,7 +54,7 @@ class STSTests: XCTestCase {
     func testSTSCredentialProviderShutdown() async throws {
         let request = STS.AssumeRoleRequest(roleArn: "arn:aws:iam::000000000000:role/Admin", roleSessionName: "test-session")
         let credentialProvider = CredentialProviderFactory.stsAssumeRole(request: request, region: .euwest2)
-        let client = AWSClient(credentialProvider: credentialProvider, httpClientProvider: .createNew, logger: TestEnvironment.logger)
+        let client = AWSClient(credentialProvider: credentialProvider, logger: TestEnvironment.logger)
         try await client.shutdown()
     }
 
@@ -69,7 +68,7 @@ class STSTests: XCTestCase {
             }
             return request
         }
-        let client = AWSClient(credentialProvider: credentialProvider, httpClientProvider: .createNew, logger: TestEnvironment.logger)
+        let client = AWSClient(credentialProvider: credentialProvider, logger: TestEnvironment.logger)
         _ = try? await client.credentialProvider.getCredential(logger: TestEnvironment.logger)
         try await client.shutdown()
         returnedRequest.withLockedValue { value in
@@ -104,7 +103,6 @@ class STSTests: XCTestCase {
                 credentialProvider: TestEnvironment.credentialProvider,
                 region: .useast1
             ),
-            httpClientProvider: .createNew,
             logger: Logger(label: "Soto")
         )
         do {
diff --git a/Tests/SotoTests/Services/TimestreamWrite/TimestreamWriteTests.swift b/Tests/SotoTests/Services/TimestreamWrite/TimestreamWriteTests.swift
index 62c42e8acf..3f76423091 100644
--- a/Tests/SotoTests/Services/TimestreamWrite/TimestreamWriteTests.swift
+++ b/Tests/SotoTests/Services/TimestreamWrite/TimestreamWriteTests.swift
@@ -32,7 +32,6 @@ class TimestreamWriteTests: XCTestCase {
         self.client = AWSClient(
             credentialProvider: TestEnvironment.credentialProvider,
             middleware: TestEnvironment.middlewares,
-            httpClientProvider: .createNew,
             logger: Logger(label: "Soto")
         )
         self.ts = TimestreamWrite(