diff --git a/.github/workflows/build-and-test.yml b/.github/workflows/build-and-test.yml
index e63c38c0..1df6b6d5 100644
--- a/.github/workflows/build-and-test.yml
+++ b/.github/workflows/build-and-test.yml
@@ -18,60 +18,66 @@ on:
 jobs:
   buildandtest_ios:
     name: Build and Test Swift Package iOS
-    uses: StanfordSpezi/.github/.github/workflows/xcodebuild-or-fastlane.yml@v2
+    uses: StanfordSpezi/.github/.github/workflows/xcodebuild-or-fastlane.yml@feature/warnings-as-errors
     with:
       runsonlabels: '["macOS", "self-hosted"]'
       scheme: Spezi-Package
       resultBundle: Spezi-Package-iOS.xcresult
       artifactname: Spezi-Package-iOS.xcresult
+      warningsAsErrors: true
   buildandtest_watchos:
     name: Build and Test Swift Package watchOS
-    uses: StanfordSpezi/.github/.github/workflows/xcodebuild-or-fastlane.yml@v2
+    uses: StanfordSpezi/.github/.github/workflows/xcodebuild-or-fastlane.yml@feature/warnings-as-errors
     with:
       runsonlabels: '["macOS", "self-hosted"]'
       scheme: Spezi-Package
       destination: 'platform=watchOS Simulator,name=Apple Watch Series 9 (45mm)'
       resultBundle: Spezi-Package-watchOS.xcresult
       artifactname: Spezi-Package-watchOS.xcresult
+      warningsAsErrors: true
   buildandtest_visionos:
     name: Build and Test Swift Package visionOS
-    uses: StanfordSpezi/.github/.github/workflows/xcodebuild-or-fastlane.yml@v2
+    uses: StanfordSpezi/.github/.github/workflows/xcodebuild-or-fastlane.yml@feature/warnings-as-errors
     with:
       runsonlabels: '["macOS", "self-hosted"]'
       scheme: Spezi-Package
       destination: 'platform=visionOS Simulator,name=Apple Vision Pro'
       resultBundle: Spezi-Package-visionOS.xcresult
       artifactname: Spezi-Package-visionOS.xcresult
+      warningsAsErrors: true
   buildandtest_tvos:
     name: Build and Test Swift Package tvOS
-    uses: StanfordSpezi/.github/.github/workflows/xcodebuild-or-fastlane.yml@v2
+    uses: StanfordSpezi/.github/.github/workflows/xcodebuild-or-fastlane.yml@feature/warnings-as-errors
     with:
       runsonlabels: '["macOS", "self-hosted"]'
       scheme: Spezi-Package
       destination: 'platform=tvOS Simulator,name=Apple TV 4K (3rd generation)'
       resultBundle: Spezi-Package-tvOS.xcresult
       artifactname: Spezi-Package-tvOS.xcresult
+      warningsAsErrors: true
   buildandtest_macos:
     name: Build and Test Swift Package macOS
-    uses: StanfordSpezi/.github/.github/workflows/xcodebuild-or-fastlane.yml@v2
+    uses: StanfordSpezi/.github/.github/workflows/xcodebuild-or-fastlane.yml@feature/warnings-as-errors
     with:
       runsonlabels: '["macOS", "self-hosted"]'
       scheme: Spezi-Package
       destination: 'platform=macOS,arch=arm64'
       resultBundle: Spezi-Package-macOS.xcresult
       artifactname: Spezi-Package-macOS.xcresult
+      warningsAsErrors: true
   buildandtestuitests_ios:
     name: Build and Test UI Tests iOS
-    uses: StanfordSpezi/.github/.github/workflows/xcodebuild-or-fastlane.yml@v2
+    uses: StanfordSpezi/.github/.github/workflows/xcodebuild-or-fastlane.yml@feature/warnings-as-errors
     with:
       runsonlabels: '["macOS", "self-hosted"]'
       path: Tests/UITests
       scheme: TestApp
       resultBundle: TestApp-iOS.xcresult
       artifactname: TestApp-iOS.xcresult
+      warningsAsErrors: true
   buildandtestuitests_visionos:
     name: Build and Test UI Tests visionOS
-    uses: StanfordSpezi/.github/.github/workflows/xcodebuild-or-fastlane.yml@v2
+    uses: StanfordSpezi/.github/.github/workflows/xcodebuild-or-fastlane.yml@feature/warnings-as-errors
     with:
       runsonlabels: '["macOS", "self-hosted"]'
       path: Tests/UITests
@@ -79,9 +85,10 @@ jobs:
       destination: 'platform=visionOS Simulator,name=Apple Vision Pro'
       resultBundle: TestApp-visionOS.xcresult
       artifactname: TestApp-visionOS.xcresult
+      warningsAsErrors: true
   uploadcoveragereport:
     name: Upload Coverage Report
     needs: [buildandtest_ios, buildandtest_watchos, buildandtest_visionos, buildandtest_tvos, buildandtest_macos, buildandtestuitests_ios, buildandtestuitests_visionos]
-    uses: StanfordSpezi/.github/.github/workflows/create-and-upload-coverage-report.yml@v2
+    uses: StanfordSpezi/.github/.github/workflows/create-and-upload-coverage-report.yml@feature/warnings-as-errors
     with:
       coveragereports: Spezi-Package-iOS.xcresult Spezi-Package-watchOS.xcresult Spezi-Package-visionOS.xcresult Spezi-Package-tvOS.xcresult Spezi-Package-macOS.xcresult TestApp-iOS.xcresult TestApp-visionOS.xcresult