diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 01c43b68f..432d7f38b 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -20,7 +20,7 @@ jobs:
       with:
         fetch-depth: 1
     - name: SPM tests
-      run: swift test --enable-code-coverage
+      run: swift test --enable-code-coverage --sanitize=thread
     - name: Convert coverage files
       run: |
         xcrun llvm-cov export -format "lcov" \
@@ -46,7 +46,9 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        tag: ['swift:5.1', 'swift:5.2']
+        tag: 
+          - swift:5.1
+          - swift:5.2
     container:
       image: ${{ matrix.tag }}
     steps:
@@ -57,9 +59,9 @@ jobs:
     - name: Install dependencies
       run: |
         apt-get update -qq
-        apt-get install -q -y tzdata libssl-dev zlib1g-dev
+        apt-get install -q -y tzdata libssl-dev zlib1g-dev curl
     - name: Test
-      run: swift test --parallel --enable-code-coverage --enable-test-discovery
+      run: swift test --enable-test-discovery --enable-code-coverage --sanitize=thread
     - name: Convert coverage files
       run: |
         llvm-cov export -format="lcov" \
@@ -67,6 +69,6 @@ jobs:
           -ignore-filename-regex="\/Tests\/" \
           -instr-profile .build/debug/codecov/default.profdata > info.lcov
     - name: Upload to codecov.io
-      uses: codecov/codecov-action@v1.0.3
+      uses: codecov/codecov-action@v1
       with:
-        token: ${{secrets.CODECOV_TOKEN}}
+        file: info.lcov
diff --git a/Tests/AWSCryptoTests/AWSCryptoTests.swift b/Tests/AWSCryptoTests/AWSCryptoTests.swift
index 5b743f0ed..10b644c04 100644
--- a/Tests/AWSCryptoTests/AWSCryptoTests.swift
+++ b/Tests/AWSCryptoTests/AWSCryptoTests.swift
@@ -142,19 +142,6 @@ final class AWSCryptoTests: XCTestCase {
         XCTAssertEqual(authenticationKey, authenticationKey2)
         XCTAssertEqual(authenticationKey.hexDigest(), authenticationKey2.hexDigest())
     }
-    
-    static var allTests = [
-        ("testMD5", testMD5),
-        ("testSHA256", testSHA256),
-        ("testSHA384", testSHA384),
-        ("testSHA512", testSHA512),
-        ("testHMAC", testHMAC),
-        ("testMD5InitUpdateFinal", testMD5InitUpdateFinal),
-        ("testSHA256InitUpdateFinal", testSHA256InitUpdateFinal),
-        ("testSHA384InitUpdateFinal", testSHA384InitUpdateFinal),
-        ("testSHA512InitUpdateFinal", testSHA512InitUpdateFinal),
-        ("testHMACInitUpdateFinal", testHMACInitUpdateFinal)
-    ]
 }
 
 public extension Sequence where Element == UInt8 {
diff --git a/Tests/AWSSDKSwiftCoreTests/AWSClientTests.swift b/Tests/AWSSDKSwiftCoreTests/AWSClientTests.swift
index d24c3dba1..3a41b1c7d 100644
--- a/Tests/AWSSDKSwiftCoreTests/AWSClientTests.swift
+++ b/Tests/AWSSDKSwiftCoreTests/AWSClientTests.swift
@@ -41,43 +41,6 @@ class AWSClientTests: XCTestCase {
         }
     }
 
-    static var allTests : [(String, (AWSClientTests) -> () throws -> Void)] {
-        return [
-            ("testGetCredential", testGetCredential),
-            ("testExpiredCredential", testExpiredCredential),
-            ("testCreateAWSRequest", testCreateAWSRequest),
-            ("testCreateNIORequest", testCreateNIORequest),
-            ("testUnsignedClient", testUnsignedClient),
-            ("testProtocolContentType", testProtocolContentType),
-            ("testHeaderEncoding", testHeaderEncoding),
-            ("testQueryEncoding", testQueryEncoding),
-            ("testQueryEncodedArray", testQueryEncodedArray),
-            ("testQueryEncodedDictionary", testQueryEncodedDictionary),
-            ("testURIEncoding", testURIEncoding),
-            ("testValidateXMLResponse", testValidateXMLResponse),
-            ("testValidateXMLCodablePayloadResponse", testValidateXMLCodablePayloadResponse),
-            ("testXMLError", testXMLError),
-            ("testValidateQueryError", testQueryError),
-            ("testValidateJSONResponse", testValidateJSONResponse),
-            ("testValidateJSONCodablePayloadResponse", testValidateJSONCodablePayloadResponse),
-            ("testValidateJSONRawPayloadResponse", testValidateJSONRawPayloadResponse),
-            ("testValidateJSONError", testJSONError),
-            ("testProcessHAL", testProcessHAL),
-            ("testDataInJsonPayload", testDataInJsonPayload),
-            ("testPayloadDataInResponse", testPayloadDataInResponse),
-            ("testClientNoInputNoOutput", testClientNoInputNoOutput),
-            ("testClientWithInputNoOutput", testClientWithInputNoOutput),
-            ("testClientNoInputWithOutput", testClientNoInputWithOutput),
-            ("testEC2ClientRequest", testEC2ClientRequest),
-            ("testEC2ValidateError", testEC2ValidateError),
-            ("testRegionEnum", testRegionEnum),
-            ("testServerError", testServerError),
-            ("testClientRetry", testClientRetry),
-            ("testClientRetryFail", testClientRetryFail),
-            ("testClientResponseEventLoop", testClientResponseEventLoop),
-        ]
-    }
-
     struct C: AWSEncodableShape {
         public static var _encoding: [AWSMemberEncoding] = [
              AWSMemberEncoding(label: "value", location: .header(locationName: "value"))
diff --git a/Tests/AWSSDKSwiftCoreTests/CredentialTests.swift b/Tests/AWSSDKSwiftCoreTests/CredentialTests.swift
index b29264f82..6250fec01 100644
--- a/Tests/AWSSDKSwiftCoreTests/CredentialTests.swift
+++ b/Tests/AWSSDKSwiftCoreTests/CredentialTests.swift
@@ -240,17 +240,4 @@ class CredentialTests: XCTestCase {
             XCTFail("\(error)")
         }
     }
-    
-    static var allTests : [(String, (CredentialTests) -> () throws -> Void)] {
-        return [
-            ("testSharedCredentials", testSharedCredentials),
-            ("testSharedCredentialsMissingSessionToken", testSharedCredentialsMissingSessionToken),
-            ("testSharedCredentialsMissingAccessKey", testSharedCredentialsMissingAccessKey),
-            ("testSharedCredentialsMissingSecretKey", testSharedCredentialsMissingSecretKey),
-            ("testSharedCredentialsMissingProfile", testSharedCredentialsMissingProfile),
-            ("testSharedCredentialsParseFailure", testSharedCredentialsParseFailure),
-            ("testExpiringCredential", testExpiringCredential),
-            ("testSharedCredentialINIParser", testSharedCredentialINIParser)
-        ]
-    }
 }
diff --git a/Tests/AWSSDKSwiftCoreTests/DictionaryEncoderTests.swift b/Tests/AWSSDKSwiftCoreTests/DictionaryEncoderTests.swift
index 1fc6ae1f9..4d0fd27c4 100644
--- a/Tests/AWSSDKSwiftCoreTests/DictionaryEncoderTests.swift
+++ b/Tests/AWSSDKSwiftCoreTests/DictionaryEncoderTests.swift
@@ -405,26 +405,5 @@ class DictionaryEncoderTests: XCTestCase {
             XCTFail("\(error)")
         }
     }
-    
-    static var allTests : [(String, (DictionaryEncoderTests) -> () throws -> Void)] {
-        return [
-            ("testDecode", testDecode),
-            ("testDecodeFail", testDecodeFail),
-            ("testSimpleStructureDecodeEncode", testSimpleStructureDecodeEncode),
-            ("testBaseTypesDecodeEncode", testBaseTypesDecodeEncode),
-            ("testContainingStructureDecodeEncode", testContainingStructureDecodeEncode),
-            ("testEnumDecodeEncode", testEnumDecodeEncode),
-            ("testArrayDecodeEncode", testArrayDecodeEncode),
-            ("testArrayOfStructuresDecodeEncode", testArrayOfStructuresDecodeEncode),
-            ("testDictionaryDecodeEncode", testDictionaryDecodeEncode),
-            ("testEnumDictionaryDecodeEncode", testEnumDictionaryDecodeEncode),
-            ("testDataDecodeEncode", testDataDecodeEncode),
-            ("testFloatOverflowDecodeErrors", testFloatOverflowDecodeErrors),
-            ("testInvalidValueDecodeErrors", testInvalidValueDecodeErrors),
-            ("testMissingKeyDecodeErrors", testMissingKeyDecodeErrors),
-            ("testNestedContainer", testNestedContainer),
-            ("testSupercoder", testSupercoder)
-        ]
-    }
 }
 
diff --git a/Tests/AWSSDKSwiftCoreTests/HTTPClientTests.swift b/Tests/AWSSDKSwiftCoreTests/HTTPClientTests.swift
index 796d1794a..9a62af088 100644
--- a/Tests/AWSSDKSwiftCoreTests/HTTPClientTests.swift
+++ b/Tests/AWSSDKSwiftCoreTests/HTTPClientTests.swift
@@ -127,14 +127,6 @@ class AsyncHTTPClientTests: XCTestCase {
     func testBody() {
         HTTPClientTests(client).testBody()
     }
-
-    static var allTests : [(String, (AsyncHTTPClientTests) -> () throws -> Void)] {
-        return [
-            ("testGet", testGet),
-            ("testHeaders", testHeaders),
-            ("testBody", testBody)
-        ]
-    }
 }
 
 /// HTTP Client tests, to be used with any HTTP client that conforms to AWSHTTPClient
diff --git a/Tests/AWSSDKSwiftCoreTests/JSONCoderTests.swift b/Tests/AWSSDKSwiftCoreTests/JSONCoderTests.swift
index 914c68aae..aa22c96b6 100644
--- a/Tests/AWSSDKSwiftCoreTests/JSONCoderTests.swift
+++ b/Tests/AWSSDKSwiftCoreTests/JSONCoderTests.swift
@@ -151,12 +151,6 @@ class JSONCoderTests: XCTestCase {
             XCTFail(error.localizedDescription)
         }
     }
-
-    static var allTests : [(String, (JSONCoderTests) -> () throws -> Void)] {
-        return [
-            ("testSerializeToDictionaryAndJSON", testSerializeToDictionaryAndJSON),
-        ]
-    }
 }
 
 
diff --git a/Tests/AWSSDKSwiftCoreTests/MetaDataServiceTests.swift b/Tests/AWSSDKSwiftCoreTests/MetaDataServiceTests.swift
index 023189b66..7881809a8 100644
--- a/Tests/AWSSDKSwiftCoreTests/MetaDataServiceTests.swift
+++ b/Tests/AWSSDKSwiftCoreTests/MetaDataServiceTests.swift
@@ -19,13 +19,6 @@ import NIOFoundationCompat
 @testable import AWSSDKSwiftCore
 
 class MetaDataServiceTests: XCTestCase {
-    static var allTests : [(String, (MetaDataServiceTests) -> () throws -> Void)] {
-        return [
-            ("testInstanceMetaDataService", testInstanceMetaDataService),
-            ("testInstanceMetaDataServiceFail", testInstanceMetaDataServiceFail),
-            ("testMetaDataGetCredential", testMetaDataGetCredential)
-        ]
-    }
 
     func testInstanceMetaDataService() {
         let body: [String: String] = ["Code" : "Success",
diff --git a/Tests/AWSSDKSwiftCoreTests/PaginateTests.swift b/Tests/AWSSDKSwiftCoreTests/PaginateTests.swift
index aac9681d5..a0783d92d 100644
--- a/Tests/AWSSDKSwiftCoreTests/PaginateTests.swift
+++ b/Tests/AWSSDKSwiftCoreTests/PaginateTests.swift
@@ -273,13 +273,4 @@ class PaginateTests: XCTestCase {
             print(error)
         }
     }
-
-    static var allTests : [(String, (PaginateTests) -> () throws -> Void)] {
-        return [
-            ("testIntegerTokenPaginate", testIntegerTokenPaginate),
-            ("testStringTokenPaginate", testStringTokenPaginate),
-            ("testPaginateError", testPaginateError),
-            ("testPaginateErrorAfterFirstRequest", testPaginateErrorAfterFirstRequest),
-        ]
-    }
 }
diff --git a/Tests/AWSSDKSwiftCoreTests/PayloadTests.swift b/Tests/AWSSDKSwiftCoreTests/PayloadTests.swift
index 62d2703f3..8cff8d2d5 100644
--- a/Tests/AWSSDKSwiftCoreTests/PayloadTests.swift
+++ b/Tests/AWSSDKSwiftCoreTests/PayloadTests.swift
@@ -107,12 +107,4 @@ class PayloadTests: XCTestCase {
             XCTFail("Unexpected error: \(error)")
         }
     }
-
-    static var allTests : [(String, (PayloadTests) -> () throws -> Void)] {
-        return [
-            ("testStringRequestPayload", testStringRequestPayload),
-            ("testDataRequestPayload", testDataRequestPayload),
-            ("testByteBufferRequestPayload", testByteBufferRequestPayload),
-        ]
-    }
 }
diff --git a/Tests/AWSSDKSwiftCoreTests/PerformanceTests.swift b/Tests/AWSSDKSwiftCoreTests/PerformanceTests.swift
index 43303ceb4..b4b0e0643 100644
--- a/Tests/AWSSDKSwiftCoreTests/PerformanceTests.swift
+++ b/Tests/AWSSDKSwiftCoreTests/PerformanceTests.swift
@@ -318,20 +318,4 @@ class PerformanceTests: XCTestCase {
             }
         }
     }
-
-    static var allTests : [(String, (PerformanceTests) -> () throws -> Void)] {
-        return [
-            ("testHeaderRequest", testHeaderRequest),
-            ("testXMLRequest", testXMLRequest),
-            ("testXMLPayloadRequest", testXMLPayloadRequest),
-            ("testJSONRequest", testJSONRequest),
-            ("testJSONPayloadRequest", testJSONPayloadRequest),
-            ("testQueryRequest", testQueryRequest),
-            ("testUnsignedRequest", testUnsignedRequest),
-            ("testSignedURLRequest", testSignedURLRequest),
-            ("testSignedHeadersRequest", testSignedHeadersRequest),
-            ("testValidateXMLResponse", testValidateXMLResponse),
-            ("testValidateJSONResponse", testValidateJSONResponse),
-        ]
-    }
 }
diff --git a/Tests/AWSSDKSwiftCoreTests/QueryEncoderTests.swift b/Tests/AWSSDKSwiftCoreTests/QueryEncoderTests.swift
index ac98985e6..7dcc88cb7 100644
--- a/Tests/AWSSDKSwiftCoreTests/QueryEncoderTests.swift
+++ b/Tests/AWSSDKSwiftCoreTests/QueryEncoderTests.swift
@@ -241,25 +241,6 @@ class QueryEncoderTests: XCTestCase {
             XCTAssertEqual(queryAsString, "Object.Data=Hello")
         } catch {
             XCTFail("\(error)")
-        }
-
-        
-    }
-
-    static var allTests : [(String, (QueryEncoderTests) -> () throws -> Void)] {
-        return [
-            ("testSimpleStructureEncode", testSimpleStructureEncode),
-            ("testContainingStructureEncode", testContainingStructureEncode),
-            ("testEnumEncode", testEnumEncode),
-            ("testArrayEncode", testArrayEncode),
-            ("testArrayOfStructuresEncode", testArrayOfStructuresEncode),
-            ("testDictionaryEncode", testDictionaryEncode),
-            ("testDictionaryEnumKeyEncode", testDictionaryEnumKeyEncode),
-            ("testArrayEncodingEncode", testArrayEncodingEncode),
-            ("testDictionaryEncodingEncode", testDictionaryEncodingEncode),
-            ("testDictionaryEncodingEncode2", testDictionaryEncodingEncode2),
-            ("testDataBlobEncode", testDataBlobEncode),
-            ("testEC2Encode", testEC2Encode)
-        ]
+        }   
     }
 }
diff --git a/Tests/AWSSDKSwiftCoreTests/TimeStampTests.swift b/Tests/AWSSDKSwiftCoreTests/TimeStampTests.swift
index 9f9a216a4..4f8fecc6a 100644
--- a/Tests/AWSSDKSwiftCoreTests/TimeStampTests.swift
+++ b/Tests/AWSSDKSwiftCoreTests/TimeStampTests.swift
@@ -121,16 +121,4 @@ class TimeStampTests: XCTestCase {
             XCTFail("\(error)")
         }
     }
-
-    static var allTests : [(String, (TimeStampTests) -> () throws -> Void)] {
-        return [
-            ("testDecodeISOFromJSON", testDecodeISOFromJSON),
-            ("testDecodeISOFromXML", testDecodeISOFromXML),
-            ("testDecodeHttpFormattedTimestamp", testDecodeHttpFormattedTimestamp),
-            ("testDecodeUnixEpochTimestamp", testDecodeUnixEpochTimestamp),
-            ("testEncodeISO8601ToXML", testEncodeISO8601ToXML),
-            ("testEncodeHTTPHeaderToJSON", testEncodeHTTPHeaderToJSON),
-            ("testEncodeUnixEpochToJSON", testEncodeUnixEpochToJSON)
-        ]
-    }
 }
diff --git a/Tests/AWSSDKSwiftCoreTests/ValidationTests.swift b/Tests/AWSSDKSwiftCoreTests/ValidationTests.swift
index 365b76c81..1f295307c 100644
--- a/Tests/AWSSDKSwiftCoreTests/ValidationTests.swift
+++ b/Tests/AWSSDKSwiftCoreTests/ValidationTests.swift
@@ -139,15 +139,4 @@ class ValidationTests: XCTestCase {
         let a4 = A(path:"/%hello/test/")
         testValidationSuccess(a4)
     }
-
-    static var allTests : [(String, (ValidationTests) -> () throws -> Void)] {
-        return [
-            ("testNumericMinMaxValidation", testNumericMinMaxValidation),
-            ("testFloatingPointMinMaxValidation", testFloatingPointMinMaxValidation),
-            ("testStringLengthMinMaxValidation", testStringLengthMinMaxValidation),
-            ("testArrayLengthMinMaxValidation", testArrayLengthMinMaxValidation),
-            ("testStringPatternValidation", testStringPatternValidation),
-            ("testStringPattern2Validation", testStringPattern2Validation),
-        ]
-    }
 }
diff --git a/Tests/AWSSDKSwiftCoreTests/XMLCoderTests.swift b/Tests/AWSSDKSwiftCoreTests/XMLCoderTests.swift
index 3b20588ca..d5430b8f4 100644
--- a/Tests/AWSSDKSwiftCoreTests/XMLCoderTests.swift
+++ b/Tests/AWSSDKSwiftCoreTests/XMLCoderTests.swift
@@ -470,29 +470,4 @@ class XMLCoderTests: XCTestCase {
             XCTFail(error.localizedDescription)
         }
     }
-
-    static var allTests : [(String, (XMLCoderTests) -> () throws -> Void)] {
-        return [
-            ("testSimpleStructureDecodeEncode", testSimpleStructureDecodeEncode),
-            ("testContainingStructureDecodeEncode", testContainingStructureDecodeEncode),
-            ("testEnumDecodeEncode", testEnumDecodeEncode),
-            ("testArrayDecodeEncode", testArrayDecodeEncode),
-            ("testArrayOfStructuresDecodeEncode", testArrayOfStructuresDecodeEncode),
-            ("testDictionaryDecodeEncode", testDictionaryDecodeEncode),
-            ("testDataDecodeEncode", testDataDecodeEncode),
-            ("testSerializeToXML", testSerializeToXML),
-            ("testDecodeExpandedContainers", testDecodeExpandedContainers),
-            ("testArrayEncodingDecodeEncode", testArrayEncodingDecodeEncode),
-            ("testArrayOfStructuresEncodingDecodeEncode", testArrayOfStructuresEncodingDecodeEncode),
-            ("testDictionaryEncodingDecodeEncode", testDictionaryEncodingDecodeEncode),
-            ("testDictionaryOfStructuresEncodingDecodeEncode", testDictionaryOfStructuresEncodingDecodeEncode),
-            ("testFlatDictionaryEncodingDecodeEncode", testFlatDictionaryEncodingDecodeEncode),
-            ("testEnumDictionaryEncodingDecodeEncode", testEnumDictionaryEncodingDecodeEncode),
-            ("testEnumFlatDictionaryEncodingDecodeEncode", testEnumFlatDictionaryEncodingDecodeEncode),
-
-            ("testEncodeDecodeXML", testEncodeDecodeXML),
-            ("testDecodeFail", testDecodeFail),
-            ("testEncodeDecodeDictionariesXML", testEncodeDecodeDictionariesXML)
-        ]
-    }
 }
diff --git a/Tests/AWSSDKSwiftCoreTests/XMLTests.swift b/Tests/AWSSDKSwiftCoreTests/XMLTests.swift
index dc2473ab4..51aba28ab 100644
--- a/Tests/AWSSDKSwiftCoreTests/XMLTests.swift
+++ b/Tests/AWSSDKSwiftCoreTests/XMLTests.swift
@@ -112,24 +112,5 @@ class XMLTests: XCTestCase {
             XCTFail(error.localizedDescription)
         }
     }
-    
-    static var allTests : [(String, (XMLTests) -> () throws -> Void)] {
-        return [
-            ("testAddChild", testAddChild),
-            ("testAddRemoveChild", testAddRemoveChild),
-            ("testAttributeAdd", testAttributeAdd),
-            ("testAttributeReplace", testAttributeReplace),
-            ("testNamespaceAdd", testNamespaceAdd),
-            ("testNamespaceReplace", testNamespaceReplace),
-            ("testDocumentDefaultOutput", testDocumentDefaultOutput),
-            ("testNullNamespaceReplace", testNamespaceReplace),
-            ("testAttributesDecodeEncode", testAttributesDecodeEncode),
-            ("testNamespacesDecodeEncode", testNamespacesDecodeEncode),
-            ("testArrayDecodeEncode", testArrayDecodeEncode),
-            ("testCommentDecodeEncode", testArrayDecodeEncode),
-            ("testCDATADecodeEncode", testArrayDecodeEncode),
-            ("testWhitespaceDecodeEncode", testWhitespaceDecodeEncode),
-        ]
-    }
 }
 
diff --git a/Tests/AWSSignerTests/AWSSignerTests.swift b/Tests/AWSSignerTests/AWSSignerTests.swift
index 40d3d5204..1fc98918c 100644
--- a/Tests/AWSSignerTests/AWSSignerTests.swift
+++ b/Tests/AWSSignerTests/AWSSignerTests.swift
@@ -108,15 +108,4 @@ final class AWSSignerTests: XCTestCase {
             }
         }
     }
-
-    static var allTests = [
-        ("testSignGetHeaders", testSignGetHeaders),
-        ("testSignPutHeaders", testSignPutHeaders),
-        ("testSignS3GetURL", testSignS3GetURL),
-        ("testSignS3GetWithQueryURL", testSignS3GetWithQueryURL),
-        ("testSignS3PutURL", testSignS3PutURL),
-        ("testBodyData", testBodyData),
-        ("testPerformanceSignedURL", testPerformanceSignedURL),
-        ("testPerformanceSignedHeaders", testPerformanceSignedHeaders),
-    ]
 }
diff --git a/Tests/LinuxMain.swift b/Tests/LinuxMain.swift
index 15dc72669..32cfce2a8 100644
--- a/Tests/LinuxMain.swift
+++ b/Tests/LinuxMain.swift
@@ -11,24 +11,3 @@
 // SPDX-License-Identifier: Apache-2.0
 //
 //===----------------------------------------------------------------------===//
-
-import XCTest
-@testable import AWSSDKSwiftCoreTests
-@testable import AWSSignerTests
-
-XCTMain([
-    testCase(AsyncHTTPClientTests.allTests),
-    testCase(AWSClientTests.allTests),
-    testCase(CredentialTests.allTests),
-    testCase(DictionaryEncoderTests.allTests),
-    testCase(JSONCoderTests.allTests),
-    testCase(MetaDataServiceTests.allTests),
-    testCase(PaginateTests.allTests),
-    testCase(PerformanceTests.allTests),
-    testCase(QueryEncoderTests.allTests),
-    testCase(TimeStampTests.allTests),
-    testCase(ValidationTests.allTests),
-    testCase(XMLCoderTests.allTests),
-    testCase(XMLTests.allTests),
-    testCase(AWSSignerTests.allTests)
-])