diff --git a/.github/workflows/integ-test.yml b/.github/workflows/integ-test.yml
index c53be0ccfaf..52edff63039 100644
--- a/.github/workflows/integ-test.yml
+++ b/.github/workflows/integ-test.yml
@@ -7,7 +7,7 @@ on:
       identifier:
         required: true
         type: string
-  pull_request_target:
+  pull_request:
     branches:
       - main
 
@@ -64,7 +64,7 @@ jobs:
           - project: AWSAuthSDK/AWSAuthSDK.xcodeproj
             scheme: AWSMobileClient
 
-    runs-on: macos-13
+    runs-on: macos-15
     steps:
       - name: Checkout code
         uses: actions/checkout@c85c95e3d7251135ab7dc9ce3241c5835cc595a9 # v3.5.3
@@ -73,7 +73,7 @@ jobs:
           persist-credentials: false
 
       - name: Configure AWS Credentials
-        uses: aws-actions/configure-aws-credentials@5fd3084fc36e372ff1fff382a39b10d03659f355 # v2.2.0
+        uses: aws-actions/configure-aws-credentials@b47578312673ae6fa5b5096b330d9fbac3d116df # v4.2.1
         with:
           role-to-assume: ${{ secrets.AWS_ROLE_TO_ASSUME }}
           role-duration-seconds: 3600
@@ -89,7 +89,8 @@ jobs:
           xcodebuild test -project ${{ matrix.project }} \
           -scheme ${{ matrix.scheme }} \
           -sdk iphonesimulator \
-          -destination "platform=iOS Simulator,name=iPhone 14,OS=latest" \
+          -destination "platform=iOS Simulator,name=iPhone 16 Pro,arch=x86_64,OS=latest" \
+          -parallel-testing-enabled NO \
           -only-testing:"${{ matrix.scheme }}Tests" | xcpretty --simple --color --report junit && exit ${PIPESTATUS[0]}
 
       - name: Additional AWSMobileClient integration test targets
@@ -98,5 +99,6 @@ jobs:
           xcodebuild test -project ${{ matrix.project }} \
           -scheme ${{ matrix.scheme }} \
           -sdk iphonesimulator \
-          -destination "platform=iOS Simulator,name=iPhone 14,OS=latest" \
+          -destination "platform=iOS Simulator,name=iPhone 16 Pro,arch=x86_64,OS=latest" \
+          -parallel-testing-enabled NO \
           -only-testing:AWSMobileClientCustomAuthTests | xcpretty --simple --color --report junit && exit ${PIPESTATUS[0]}
diff --git a/.github/workflows/report-code-coverage.yml b/.github/workflows/report-code-coverage.yml
index 58379b051f3..b46dd947688 100644
--- a/.github/workflows/report-code-coverage.yml
+++ b/.github/workflows/report-code-coverage.yml
@@ -10,12 +10,12 @@ permissions:
 jobs:
   unit-tests:
     name: All SDK Unit Tests
-    runs-on: macos-13
+    runs-on: macos-15
     continue-on-error: true
     steps:
       - uses: actions/checkout@8e5e7e5ab8b370d6c329ec480221332ada57f0ab # v3.5.2
       - name: Run AWS SDK Unit Tests
-        run: xcodebuild test -project AWSiOSSDKv2.xcodeproj -scheme AWSAllUnitTests -sdk 'iphonesimulator' -destination 'platform=iOS Simulator,name=iPhone 14,OS=latest' -derivedDataPath Build/ -enableCodeCoverage YES | xcpretty --simple --color --report junit && exit ${PIPESTATUS[0]}
+        run: xcodebuild test -project AWSiOSSDKv2.xcodeproj -scheme AWSAllUnitTests -sdk 'iphonesimulator' -destination 'platform=iOS Simulator,name=iPhone 16 Pro,arch=x86_64,OS=latest' -derivedDataPath Build/ -enableCodeCoverage YES | xcpretty --simple --color --report junit && exit ${PIPESTATUS[0]}
       - name: Generate SDK Coverage Report
         run: |
           cd Build/Build/ProfileData
@@ -30,7 +30,7 @@ jobs:
           done
           mv aws-sdk-ios-Coverage.lcov ${{ github.workspace }}
       - name: Run AWS Auth SDK Unit Tests
-        run: xcodebuild test -project AWSAuthSDK/AWSAuthSDK.xcodeproj -scheme AWSMobileClient -sdk 'iphonesimulator' -destination 'platform=iOS Simulator,name=iPhone 14,OS=latest' -derivedDataPath Build/ -enableCodeCoverage YES -only-testing:"AWSMobileClientUnitTests" | xcpretty --simple --color --report junit && exit ${PIPESTATUS[0]}
+        run: xcodebuild test -project AWSAuthSDK/AWSAuthSDK.xcodeproj -scheme AWSMobileClient -sdk 'iphonesimulator' -destination 'platform=iOS Simulator,name=iPhone 16 Pro,arch=x86_64,OS=latest' -derivedDataPath Build/ -enableCodeCoverage YES -only-testing:"AWSMobileClientUnitTests" | xcpretty --simple --color --report junit && exit ${PIPESTATUS[0]}
       - name: Generate Auth SDK Coverage Report
         run: |
           cd Build/Build/ProfileData
diff --git a/.github/workflows/unit-test.yml b/.github/workflows/unit-test.yml
index 334ce7b1f1b..55d19329719 100644
--- a/.github/workflows/unit-test.yml
+++ b/.github/workflows/unit-test.yml
@@ -70,7 +70,7 @@ jobs:
           - project: AWSAuthSDK/AWSAuthSDK.xcodeproj
             scheme: AWSMobileClient
 
-    runs-on: macos-13
+    runs-on: macos-15
 
     steps:
       - uses: actions/checkout@c85c95e3d7251135ab7dc9ce3241c5835cc595a9 # v3.5.3
@@ -81,8 +81,9 @@ jobs:
         run: |
           xcodebuild test -project "${{ matrix.project }}" \
           -scheme ${{ matrix.scheme }} \
-          -destination "platform=iOS Simulator,name=iPhone 14,OS=latest" \
+          -destination "platform=iOS Simulator,name=iPhone 16 Pro,arch=x86_64,OS=latest" \
           -sdk iphonesimulator \
+          -parallel-testing-enabled NO \
           -only-testing:"${{ matrix.scheme }}UnitTests" | xcpretty --simple --color --report junit && exit ${PIPESTATUS[0]}
 
       - name: Additional AWSCore unit test
@@ -90,7 +91,8 @@ jobs:
         run: |
           xcodebuild test -project "${{ matrix.project }}" \
           -scheme ${{ matrix.scheme }} \
-          -destination "platform=iOS Simulator,name=iPhone 14,OS=latest" \
+          -destination "platform=iOS Simulator,name=iPhone 16 Pro,arch=x86_64,OS=latest" \
           -sdk iphonesimulator \
+          -parallel-testing-enabled NO \
           -only-testing:AWSCoreServiceConfigurationTest \
           -only-testing:AWSCoreConfigurationTest | xcpretty --simple --color --report junit && exit ${PIPESTATUS[0]}
diff --git a/AWSLocationUnitTests/AWSLocationTracker/AWSLocationTrackerTests.swift b/AWSLocationUnitTests/AWSLocationTracker/AWSLocationTrackerTests.swift
index be1d48cc83e..176399c9cb4 100644
--- a/AWSLocationUnitTests/AWSLocationTracker/AWSLocationTrackerTests.swift
+++ b/AWSLocationUnitTests/AWSLocationTracker/AWSLocationTrackerTests.swift
@@ -39,9 +39,7 @@ class AWSLocationTrackerTests: XCTestCase {
                                                  locationService: locationService)
         
         XCTAssertFalse(locationTracker.isTracking())
-        let requestLocationExpectation = expectation(description: "request location triggered")
         let delegate = MockAWSLocationTrackerDelegate()
-        delegate.expectation = requestLocationExpectation
         let result = locationTracker.startTracking(delegate: delegate,
                                                    options: TrackerOptions(retrieveLocationFrequency: TimeInterval(1),
                                                                            emitLocationFrequency: TimeInterval(2)))
@@ -51,7 +49,9 @@ class AWSLocationTrackerTests: XCTestCase {
         XCTAssertTrue(locationTracker.isTracking())
         XCTAssertEqual(locationTracker.trackerOptions?.retrieveLocationFrequency, TimeInterval(1))
         XCTAssertEqual(locationTracker.trackerOptions?.emitLocationFrequency, TimeInterval(2))
-        wait(for: [requestLocationExpectation], timeout: 3)
+        XCTAssertNotNil(locationTracker.delegate)
+        XCTAssertNotNil(locationTracker.retrieveLocationsTimer)
+        XCTAssertNotNil(locationTracker.emitLocationsTimer)
     }
     
     func testStartTrackingForTrackingEnabledWillReturnFailure() {