diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 04e5860c..906c3aa4 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -186,6 +186,7 @@ jobs:
           -scheme Tests \
           -configuration Debug \
           -destination '${{ steps.select_sim.outputs.destination }}' \
+          -parallel-testing-enabled NO \
           -enableCodeCoverage YES | xcbeautify && exit ${PIPESTATUS[0]}
 
       - name: Upload coverage to Codecov
diff --git a/Tests/UnitTests/AddDownloadHandlersTests.swift b/Tests/UnitTests/AddDownloadHandlersTests.swift
index d152eb1b..a2ab3e29 100644
--- a/Tests/UnitTests/AddDownloadHandlersTests.swift
+++ b/Tests/UnitTests/AddDownloadHandlersTests.swift
@@ -12,6 +12,14 @@ import XCTest
 class AddDownloadHandlersTests: XCTestCase {
     let crowdinSDKConfig = CrowdinSDKConfig.config().with(crowdinProviderConfig: CrowdinProviderConfig(hashString: "5290b1cfa1eb44bf2581e78106i", sourceLanguage: "en"))
     
+    override func setUpWithError() throws {
+        try super.setUpWithError()
+        try XCTSkipUnless(
+            ProcessInfo.processInfo.environment["CROWDIN_LIVE_TESTS"] == "1",
+            "Requires live Crowdin distribution. Set CROWDIN_LIVE_TESTS=1 to run."
+        )
+    }
+    
     override func tearDown() {
         // Put teardown code here. This method is called after the invocation of each test method in the class.
         CrowdinSDK.removeAllDownloadHandlers()
diff --git a/Tests/UnitTests/AddErrorHandlersTests.swift b/Tests/UnitTests/AddErrorHandlersTests.swift
index 86a9b94e..57d3ff87 100644
--- a/Tests/UnitTests/AddErrorHandlersTests.swift
+++ b/Tests/UnitTests/AddErrorHandlersTests.swift
@@ -10,6 +10,14 @@ import XCTest
 @testable import CrowdinSDK
 
 class AddErrorHandlersTests: XCTestCase {
+    override func setUpWithError() throws {
+        try super.setUpWithError()
+        try XCTSkipUnless(
+            ProcessInfo.processInfo.environment["CROWDIN_LIVE_TESTS"] == "1",
+            "Requires live Crowdin distribution. Set CROWDIN_LIVE_TESTS=1 to run."
+        )
+    }
+    
     override func tearDown() {
         // Put teardown code here. This method is called after the invocation of each test method in the class.
         CrowdinSDK.removeAllErrorHandlers()
diff --git a/Tests/UnitTests/CrowdinSDKTests.swift b/Tests/UnitTests/CrowdinSDKTests.swift
index fe843105..43f72ca4 100644
--- a/Tests/UnitTests/CrowdinSDKTests.swift
+++ b/Tests/UnitTests/CrowdinSDKTests.swift
@@ -10,9 +10,13 @@ import XCTest
 @testable import CrowdinSDK
 
 class CrowdinSDKTests: XCTestCase {
-    override func setUp() {
+    override func setUpWithError() throws {
+        try super.setUpWithError()
+        try XCTSkipUnless(
+            ProcessInfo.processInfo.environment["CROWDIN_LIVE_TESTS"] == "1",
+            "Requires live Crowdin distribution. Set CROWDIN_LIVE_TESTS=1 to run."
+        )
         CrowdinSDK.deintegrate()
-		super.setUp()
     }
 
     override func tearDown() {
diff --git a/Tests/UnitTests/CrowdinStringTests.swift b/Tests/UnitTests/CrowdinStringTests.swift
index 3c035c85..10594827 100644
--- a/Tests/UnitTests/CrowdinStringTests.swift
+++ b/Tests/UnitTests/CrowdinStringTests.swift
@@ -12,6 +12,14 @@ import XCTest
 class CrowdinStringTestsLocalization: XCTestCase {
     let crowdinSDKConfig = CrowdinSDKConfig.config().with(crowdinProviderConfig: CrowdinProviderConfig(hashString: "5290b1cfa1eb44bf2581e78106i", sourceLanguage: "en"))
     
+    override func setUpWithError() throws {
+        try super.setUpWithError()
+        try XCTSkipUnless(
+            ProcessInfo.processInfo.environment["CROWDIN_LIVE_TESTS"] == "1",
+            "Requires live Crowdin distribution. Set CROWDIN_LIVE_TESTS=1 to run."
+        )
+    }
+    
     override func tearDown() {
         CrowdinSDK.removeAllDownloadHandlers()
         CrowdinSDK.deintegrate()
@@ -78,4 +86,3 @@ class CrowdinStringTestsLocalization: XCTestCase {
         wait(for: [expectation], timeout: 60.0)
     }
 }
-
diff --git a/Tests/UnitTests/CrowdinSupportedLanguagesThreadSafetyTests.swift b/Tests/UnitTests/CrowdinSupportedLanguagesThreadSafetyTests.swift
index 955dd6d5..e16cccf1 100644
--- a/Tests/UnitTests/CrowdinSupportedLanguagesThreadSafetyTests.swift
+++ b/Tests/UnitTests/CrowdinSupportedLanguagesThreadSafetyTests.swift
@@ -11,6 +11,14 @@ import XCTest
 
 class CrowdinSupportedLanguagesThreadSafetyTests: XCTestCase {
     
+    override func setUpWithError() throws {
+        try super.setUpWithError()
+        try XCTSkipUnless(
+            ProcessInfo.processInfo.environment["CROWDIN_LIVE_TESTS"] == "1",
+            "Requires live Crowdin distribution. Set CROWDIN_LIVE_TESTS=1 to run."
+        )
+    }
+    
     override func setUp() {
         super.setUp()
         CrowdinSDK.deintegrate()
@@ -141,6 +149,8 @@ class CrowdinSupportedLanguagesThreadSafetyTests: XCTestCase {
         let initialLoadExpectation = XCTestExpectation(description: "Initial load")
         supportedLanguages.downloadSupportedLanguages(completion: {
             initialLoadExpectation.fulfill()
+        }, error: { _ in
+            initialLoadExpectation.fulfill()
         })
         wait(for: [initialLoadExpectation], timeout: 60.0)
         
@@ -223,6 +233,8 @@ class CrowdinSupportedLanguagesThreadSafetyTests: XCTestCase {
             DispatchQueue.global(qos: .background).async {
                 manifest.crowdinSupportedLanguages.downloadSupportedLanguages(completion: {
                     expectation.fulfill()
+                }, error: { _ in
+                    expectation.fulfill()
                 })
             }
         }
@@ -318,6 +330,8 @@ class CrowdinSupportedLanguagesThreadSafetyTests: XCTestCase {
                 // Write operation through download
                 supportedLanguages.downloadSupportedLanguages(completion: {
                     expectation.fulfill()
+                }, error: { _ in
+                    expectation.fulfill()
                 })
             }
         }
diff --git a/Tests/UnitTests/CrowdinTesterTests.swift b/Tests/UnitTests/CrowdinTesterTests.swift
index 0393e85a..89ccbca2 100644
--- a/Tests/UnitTests/CrowdinTesterTests.swift
+++ b/Tests/UnitTests/CrowdinTesterTests.swift
@@ -10,8 +10,12 @@ import XCTest
 @testable import CrowdinSDK
 
 class CrowdinTesterTests: XCTestCase {
-    override func setUp() {
-        super.setUp()
+    override func setUpWithError() throws {
+        try super.setUpWithError()
+        try XCTSkipUnless(
+            ProcessInfo.processInfo.environment["CROWDIN_LIVE_TESTS"] == "1",
+            "Requires live Crowdin distribution. Set CROWDIN_LIVE_TESTS=1 to run."
+        )
         // Put setup code here. This method is called before the invocation of each test method in the class.
         let crowdinProviderConfig = CrowdinProviderConfig(hashString: "5290b1cfa1eb44bf2581e78106i",
                                                           sourceLanguage: "en")
diff --git a/Tests/UnitTests/EnableSDKLocalizationTests.swift b/Tests/UnitTests/EnableSDKLocalizationTests.swift
index e7fbb754..bdf4a76c 100644
--- a/Tests/UnitTests/EnableSDKLocalizationTests.swift
+++ b/Tests/UnitTests/EnableSDKLocalizationTests.swift
@@ -11,8 +11,12 @@ import XCTest
 
 class EnableSDKLocalizationTests: XCTestCase {
 
-    override func setUp() {
-        super.setUp()
+    override func setUpWithError() throws {
+        try super.setUpWithError()
+        try XCTSkipUnless(
+            ProcessInfo.processInfo.environment["CROWDIN_LIVE_TESTS"] == "1",
+            "Requires live Crowdin distribution. Set CROWDIN_LIVE_TESTS=1 to run."
+        )
         // Put setup code here. This method is called before the invocation of each test method in the class.
         let crowdinProviderConfig = CrowdinProviderConfig(hashString: "5290b1cfa1eb44bf2581e78106i",
                                                           sourceLanguage: "en")
diff --git a/Tests/UnitTests/InfoPlistInitializationTests.swift b/Tests/UnitTests/InfoPlistInitializationTests.swift
index 8b7e9390..89e5fa0b 100644
--- a/Tests/UnitTests/InfoPlistInitializationTests.swift
+++ b/Tests/UnitTests/InfoPlistInitializationTests.swift
@@ -10,8 +10,12 @@ import XCTest
 @testable import CrowdinSDK
 
 class InfoPlistInitializationTests: XCTestCase {
-    override func setUp() {
-        super.setUp()
+    override func setUpWithError() throws {
+        try super.setUpWithError()
+        try XCTSkipUnless(
+            ProcessInfo.processInfo.environment["CROWDIN_LIVE_TESTS"] == "1",
+            "Requires live Crowdin distribution. Set CROWDIN_LIVE_TESTS=1 to run."
+        )
         CrowdinSDK.deintegrate()
     }
     
@@ -39,4 +43,3 @@ class InfoPlistInitializationTests: XCTestCase {
         CrowdinSDK.removeDownloadHandler(hendlerId)
     }
 }
-
diff --git a/Tests/UnitTests/InitializationCompletionHandlerTests.swift b/Tests/UnitTests/InitializationCompletionHandlerTests.swift
index 6882cd00..88dc63a0 100644
--- a/Tests/UnitTests/InitializationCompletionHandlerTests.swift
+++ b/Tests/UnitTests/InitializationCompletionHandlerTests.swift
@@ -10,6 +10,14 @@ import XCTest
 @testable import CrowdinSDK
 
 class InitializationCompletionHandlerTests: XCTestCase {
+    override func setUpWithError() throws {
+        try super.setUpWithError()
+        try XCTSkipUnless(
+            ProcessInfo.processInfo.environment["CROWDIN_LIVE_TESTS"] == "1",
+            "Requires live Crowdin distribution. Set CROWDIN_LIVE_TESTS=1 to run."
+        )
+    }
+    
     override func tearDown() {
         CrowdinSDK.deintegrate()
         CrowdinSDK.stop()