diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 0babcb6cc..67e192314 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -227,6 +227,10 @@ jobs:
         if: ${{ !startsWith(matrix.unity-version, '2021') }}
         run: ./test/Scripts.Integration.Test/add-dependency-conflict.ps1 -PackagePath "dependency-conflict-package"
 
+      - name: Disable DependencyConflict (WebGL 2021)
+        if: ${{ startsWith(matrix.unity-version, '2021') }}
+        run: ./test/Scripts.Integration.Test/add-dependency-conflict.ps1 -Disable
+
       - name: Configure Sentry
         run: ./test/Scripts.Integration.Test/configure-sentry.ps1 -UnityPath "$env:UNITY_PATH" -Platform "$env:BUILD_PLATFORM"
         env:
@@ -351,7 +355,8 @@ jobs:
       fail-fast: false
       matrix:
         unity-version: ${{ fromJSON(needs.create-unity-matrix.outputs.unity-matrix).unity-version }}
-        ios-version: ["17.0", "latest"]
+        # On PRs only the newest simulator runs; `17.0` is an OS-compat axis (not SDK behavior) and runs on main.
+        ios-version: ${{ github.event_name == 'pull_request' && fromJSON('["latest"]') || fromJSON('["17.0", "latest"]') }}
         init-type: ["runtime", "buildtime"]
         # Check https://support.apple.com/en-us/HT201222 for the latest minor version for a given major one.
         # https://developer.apple.com/support/app-store/ shows that of all iOS devices
@@ -411,10 +416,6 @@ jobs:
       fail-fast: false
       matrix:
         unity-version: ${{ fromJSON(needs.create-unity-matrix.outputs.unity-matrix).unity-version }}
-        # The progressive lightmapper requires a GPU, which the Apple silicon CI runners don't have.
-        # On Unity 2021 this fails the player build outright (instead of warning), so skip macOS 2021.3.
-        exclude:
-          - unity-version: "2021.3"
     uses: ./.github/workflows/test-build-macos.yml
     with:
       unity-version: ${{ matrix.unity-version }}
@@ -461,10 +462,6 @@ jobs:
       matrix:
         unity-version: ${{ fromJSON(needs.create-unity-matrix.outputs.unity-matrix).unity-version }}
         backend: ["cocoa", "native"]
-        # See test-build-macos: the progressive lightmapper needs a GPU the Apple silicon
-        # CI runners lack, which fails the Unity 2021 player build. Skip macOS 2021.3.
-        exclude:
-          - unity-version: "2021.3"
     uses: ./.github/workflows/test-run-desktop.yml
     with:
       unity-version: ${{ matrix.unity-version }}
diff --git a/.github/workflows/create-unity-matrix.yml b/.github/workflows/create-unity-matrix.yml
index 95a4704cb..5ade8e564 100644
--- a/.github/workflows/create-unity-matrix.yml
+++ b/.github/workflows/create-unity-matrix.yml
@@ -14,7 +14,7 @@ on:
 
 env:
   # Unity versions used in PRs
-  PR_UNITY_VERSIONS: '["2022.3", "6000.3", "6000.5"]'
+  PR_UNITY_VERSIONS: '["2021.3", "6000.5"]'
   # Unity versions used on main branch
   FULL_UNITY_VERSIONS: '["2021.3", "2022.3", "6000.0", "6000.3", "6000.5"]'
 
diff --git a/test/Scripts.Integration.Test/Editor/Builder.cs b/test/Scripts.Integration.Test/Editor/Builder.cs
index b1a1665a4..068ee1d07 100644
--- a/test/Scripts.Integration.Test/Editor/Builder.cs
+++ b/test/Scripts.Integration.Test/Editor/Builder.cs
@@ -127,7 +127,16 @@ public static void BuildWindowsIl2CPPPlayer()
     public static void BuildMacIl2CPPPlayer()
     {
         Debug.Log("Builder: Building macOS IL2CPP Player");
-        BuildIl2CPPPlayer(BuildTarget.StandaloneOSX, BuildTargetGroup.Standalone, BuildOptions.StrictMode,
+#if UNITY_2022_1_OR_NEWER
+        var buildOptions = BuildOptions.StrictMode;
+#else
+        // On 2021.3 the Apple silicon CI has no usable lightmapper (CPU unsupported, no OpenCL GPU
+        // device), so BuildPlayer always logs "Falling back to CPU lightmapper" as an error.
+        // StrictMode would escalate that unavoidable log to a build failure even though the build
+        // succeeds. Real failures are still caught via summary.result.
+        var buildOptions = BuildOptions.None;
+#endif
+        BuildIl2CPPPlayer(BuildTarget.StandaloneOSX, BuildTargetGroup.Standalone, buildOptions,
             defaultBuildPath: "./Builds/macOS/test.app");
     }
 
diff --git a/test/Scripts.Integration.Test/Scripts/IntegrationTester.cs b/test/Scripts.Integration.Test/Scripts/IntegrationTester.cs
index 1c0a52a72..d86f91af8 100644
--- a/test/Scripts.Integration.Test/Scripts/IntegrationTester.cs
+++ b/test/Scripts.Integration.Test/Scripts/IntegrationTester.cs
@@ -38,7 +38,7 @@ private void Awake()
     // the build red too instead of being swallowed into a log line.
     private void ExerciseConflictingDependencies()
     {
-#if !(UNITY_WEBGL && !UNITY_2022_1_OR_NEWER)
+#if !SENTRY_DISABLE_DEPENDENCY_CONFLICT
         try
         {
             var greeting = DependencyConflictPackage.DependencyConflictPackageClient.SayHiAsync().GetAwaiter().GetResult();
diff --git a/test/Scripts.Integration.Test/add-dependency-conflict.ps1 b/test/Scripts.Integration.Test/add-dependency-conflict.ps1
index d5e6bcd11..3aa31c30b 100644
--- a/test/Scripts.Integration.Test/add-dependency-conflict.ps1
+++ b/test/Scripts.Integration.Test/add-dependency-conflict.ps1
@@ -5,7 +5,11 @@ param(
     # `dotnet build test/Scripts.Integration.Test/DependencyConflictPackage`. In CI the
     # DLLs are built in build.yml and downloaded as an artifact, so the caller
     # points this at the downloaded copy.
-    [string] $PackagePath
+    [string] $PackagePath,
+
+    # Skip installing the package and instead define SENTRY_DISABLE_DEPENDENCY_CONFLICT
+    # so IntegrationTester.cs compiles out its call into the package.
+    [switch] $Disable
 )
 
 if (-not $Global:NewProjectPathCache)
@@ -15,6 +19,14 @@ if (-not $Global:NewProjectPathCache)
 
 . $PSScriptRoot/common.ps1
 
+if ($Disable)
+{
+    $cscRspPath = "$(GetNewProjectAssetsPath)/csc.rsp"
+    Write-Log "Defining SENTRY_DISABLE_DEPENDENCY_CONFLICT via '$cscRspPath'..."
+    Add-Content -Path $cscRspPath -Value "-define:SENTRY_DISABLE_DEPENDENCY_CONFLICT"
+    return
+}
+
 # The DependencyConflict package ships plain, UNALIASED System.*/Microsoft.*
 # assemblies at versions that differ from the ones the Sentry SDK ships aliased.
 # Dropping it into the test project as an embedded package - alongside Sentry -
diff --git a/test/Scripts.Integration.Test/integration-test.ps1 b/test/Scripts.Integration.Test/integration-test.ps1
index b0d1a9af0..183d42256 100644
--- a/test/Scripts.Integration.Test/integration-test.ps1
+++ b/test/Scripts.Integration.Test/integration-test.ps1
@@ -46,13 +46,21 @@ If (-not(Test-Path -Path "$(GetNewProjectPath)")) {
     Write-PhaseSuccess "Sentry added"
 
     Write-PhaseHeader "Adding DependencyConflict (alias stress-test)"
-    dotnet build test/Scripts.Integration.Test/DependencyConflictPackage
-    if ($LASTEXITCODE -ne 0)
+    if ($Platform -eq "WebGL" -and $UnityVersion.StartsWith("2021"))
     {
-        Write-Error "Failed to build the DependencyConflict package."
+        ./test/Scripts.Integration.Test/add-dependency-conflict.ps1 -Disable
+        Write-PhaseSuccess "DependencyConflict disabled (WebGL 2021)"
+    }
+    else
+    {
+        dotnet build test/Scripts.Integration.Test/DependencyConflictPackage
+        if ($LASTEXITCODE -ne 0)
+        {
+            Write-Error "Failed to build the DependencyConflict package."
+        }
+        ./test/Scripts.Integration.Test/add-dependency-conflict.ps1
+        Write-PhaseSuccess "DependencyConflict added"
     }
-    ./test/Scripts.Integration.Test/add-dependency-conflict.ps1
-    Write-PhaseSuccess "DependencyConflict added"
 
     Write-PhaseHeader "Configuring Sentry"
     ./test/Scripts.Integration.Test/configure-sentry.ps1 "$UnityPath" -Platform $Platform