diff --git a/eng/testing/linker/SupportFiles/Directory.Build.props b/eng/testing/linker/SupportFiles/Directory.Build.props
index 46e0d3bcc0aad..c1220c719b9af 100644
--- a/eng/testing/linker/SupportFiles/Directory.Build.props
+++ b/eng/testing/linker/SupportFiles/Directory.Build.props
@@ -1,9 +1,6 @@
 <Project>
   <PropertyGroup>
     <SkipConfigureTrimming>true</SkipConfigureTrimming>
-    <UseDefaultBlazorWASMFeatureSwitches>false</UseDefaultBlazorWASMFeatureSwitches>
-    <UseDefaultAndroidFeatureSwitches>false</UseDefaultAndroidFeatureSwitches>
-    <UseDefaultiOSFeatureSwitches>false</UseDefaultiOSFeatureSwitches>
     <PublishTrimmed>true</PublishTrimmed>
     <SkipImportRepoLinkerTargets>true</SkipImportRepoLinkerTargets>
     <SuppressTrimAnalysisWarnings>true</SuppressTrimAnalysisWarnings>
diff --git a/eng/testing/tests.mobile.targets b/eng/testing/tests.mobile.targets
index 3e5321d57ebdb..61d7421402d89 100644
--- a/eng/testing/tests.mobile.targets
+++ b/eng/testing/tests.mobile.targets
@@ -6,37 +6,20 @@
     <RunAOTCompilation Condition="'$(TargetOS)' == 'iOS' or '$(TargetOS)' == 'tvOS'">true</RunAOTCompilation>
 
     <PublishingTestsRun>true</PublishingTestsRun>
-    <UseDefaultBlazorWASMFeatureSwitches Condition="'$(UseDefaultBlazorWASMFeatureSwitches)' == ''">true</UseDefaultBlazorWASMFeatureSwitches>
-    <UseDefaultAndroidFeatureSwitches Condition="'$(UseDefaultAndroidFeatureSwitches)' == ''">true</UseDefaultAndroidFeatureSwitches>
-    <UseDefaultiOSFeatureSwitches Condition="'$(UseDefaultiOSFeatureSwitches)' == ''">true</UseDefaultiOSFeatureSwitches>
     <BundleTestAppTargets>BundleTestAppleApp;BundleTestAndroidApp</BundleTestAppTargets>
   </PropertyGroup>
 
-  <PropertyGroup Condition="'$(TargetOS)' == 'Android' and '$(UseDefaultAndroidFeatureSwitches)' == 'true'">
-    <DebuggerSupport>false</DebuggerSupport>
-    <EnableUnsafeUTF7Encoding Condition="'$(EnableUnsafeUTF7Encoding)' == ''">false</EnableUnsafeUTF7Encoding>
-    <EnableUnsafeBinaryFormatterSerialization>false</EnableUnsafeBinaryFormatterSerialization>
-    <EventSourceSupport>false</EventSourceSupport>
-    <UseSystemResourceKeys Condition="'$(UseSystemResourceKeys)' == ''">true</UseSystemResourceKeys>
-    <HttpActivityPropagationSupport>false</HttpActivityPropagationSupport>
-    <StartupHookSupport>false</StartupHookSupport>
-    <UseNativeHttpHandler>true</UseNativeHttpHandler>
-  </PropertyGroup>
-
-  <PropertyGroup Condition="('$(TargetOS)' == 'iOS' or '$(TargetOS)' == 'iOSSimulator') and '$(UseDefaultiOSFeatureSwitches)' == 'true'">
-    <EnableUnsafeBinaryFormatterSerialization>false</EnableUnsafeBinaryFormatterSerialization>
-    <EnableUnsafeUTF7Encoding Condition="'$(EnableUnsafeUTF7Encoding)' == ''">false</EnableUnsafeUTF7Encoding>
-    <EventSourceSupport>false</EventSourceSupport>
-    <HttpActivityPropagationSupport>false</HttpActivityPropagationSupport>
-    <StartupHookSupport>false</StartupHookSupport>
-    <UseSystemResourceKeys Condition="'$(UseSystemResourceKeys)' == ''">true</UseSystemResourceKeys>
-    <UseNativeHttpHandler>true</UseNativeHttpHandler>
-  </PropertyGroup>
-
   <PropertyGroup Condition="'$(EnableAggressiveTrimming)' == 'true'">
     <PublishTrimmed>true</PublishTrimmed>
     <!-- Suppress linker warnings as these are tests -->
     <SuppressTrimAnalysisWarnings>true</SuppressTrimAnalysisWarnings>
+
+    <!-- Reduce library test app size by trimming framework library features  -->
+    <DebuggerSupport Condition="'$(DebuggerSupport)' == '' and '$(Configuration)' != 'Debug'">false</DebuggerSupport>
+    <EnableUnsafeUTF7Encoding Condition="'$(EnableUnsafeUTF7Encoding)' == ''">false</EnableUnsafeUTF7Encoding>
+    <EventSourceSupport Condition="'$(EventSourceSupport)' == ''">false</EventSourceSupport>
+    <HttpActivityPropagationSupport Condition="'$(HttpActivityPropagationSupport)' == ''">false</HttpActivityPropagationSupport>
+    <UseSystemResourceKeys Condition="'$(UseSystemResourceKeys)' == ''">false</UseSystemResourceKeys>
   </PropertyGroup>
 
   <PropertyGroup>
diff --git a/eng/testing/tests.wasm.targets b/eng/testing/tests.wasm.targets
index 5d6c2e626eab7..ce10194388d55 100644
--- a/eng/testing/tests.wasm.targets
+++ b/eng/testing/tests.wasm.targets
@@ -47,16 +47,6 @@
     <RunScriptCommand Condition="'$(RunScriptCommand)' != ''">$(_AOTBuildCommand) &amp;&amp; $(RunScriptCommand)</RunScriptCommand>
   </PropertyGroup>
 
-  <PropertyGroup Condition="'$(UseDefaultBlazorWASMFeatureSwitches)' == 'true'">
-    <EventSourceSupport>false</EventSourceSupport>
-    <UseSystemResourceKeys>false</UseSystemResourceKeys>
-    <EnableUnsafeUTF7Encoding>false</EnableUnsafeUTF7Encoding>
-    <HttpActivityPropagationSupport>false</HttpActivityPropagationSupport>
-
-    <!-- we want to default to what Blazor has, except if we are building in Debug config -->
-    <DebuggerSupport Condition="'$(DebuggerSupport)' == '' and '$(Configuration)' != 'Debug'">false</DebuggerSupport>
-  </PropertyGroup>
-
   <!-- Don't include InTree.props here, because the test projects themselves can set the target* properties -->
   <Import Project="$(MonoProjectRoot)\wasm\build\WasmApp.props"
           Condition="'$(BuildAOTTestsOn)' == 'local'" />
diff --git a/src/libraries/System.Net.WebSockets/tests/WebSocketDeflateTests.cs b/src/libraries/System.Net.WebSockets/tests/WebSocketDeflateTests.cs
index 9a068e3de46a4..184c7e9089e2a 100644
--- a/src/libraries/System.Net.WebSockets/tests/WebSocketDeflateTests.cs
+++ b/src/libraries/System.Net.WebSockets/tests/WebSocketDeflateTests.cs
@@ -349,7 +349,6 @@ public async Task LargeMessageSplitInMultipleFrames(int windowBits)
         }
 
         [Fact]
-        [ActiveIssue("https://github.com/dotnet/runtime/issues/52645", TestPlatforms.Android)]
         public async Task WebSocketWithoutDeflateShouldThrowOnCompressedMessage()
         {
             WebSocketTestStream stream = new();
@@ -364,7 +363,6 @@ public async Task WebSocketWithoutDeflateShouldThrowOnCompressedMessage()
         }
 
         [Fact]
-        [ActiveIssue("https://github.com/dotnet/runtime/issues/52645", TestPlatforms.Android)]
         public async Task ReceiveUncompressedMessageWhenCompressionEnabled()
         {
             // We should be able to handle the situation where even if we have
@@ -401,7 +399,6 @@ public async Task ReceiveUncompressedMessageWhenCompressionEnabled()
         }
 
         [Fact]
-        [ActiveIssue("https://github.com/dotnet/runtime/issues/52645", TestPlatforms.Android)]
         public async Task ReceiveInvalidCompressedData()
         {
             WebSocketTestStream stream = new();
diff --git a/src/tests/FunctionalTests/Directory.Build.props b/src/tests/FunctionalTests/Directory.Build.props
index b55014abfd0ce..5dea1a35e0ccc 100644
--- a/src/tests/FunctionalTests/Directory.Build.props
+++ b/src/tests/FunctionalTests/Directory.Build.props
@@ -7,5 +7,40 @@
     <IsFunctionalTest>true</IsFunctionalTest>
   </PropertyGroup>
 
+  <!-- Available feature switches: https://github.com/dotnet/runtime/blob/master/docs/workflow/trimming/feature-switches.md -->
+  <PropertyGroup Condition="'$(TargetsMobile)' == 'true'">
+    <EnableUnsafeUTF7Encoding Condition="'$(EnableUnsafeUTF7Encoding)' == ''">false</EnableUnsafeUTF7Encoding>
+    <EventSourceSupport Condition="'$(EventSourceSupport)' == ''">false</EventSourceSupport>
+    <HttpActivityPropagationSupport Condition="'$(HttpActivityPropagationSupport)' == ''">false</HttpActivityPropagationSupport>
+    <UseSystemResourceKeys Condition="'$(UseSystemResourceKeys)' == ''">true</UseSystemResourceKeys>
+  </PropertyGroup>
+
+  <!-- Modeled after Microsoft.Android.Sdk.ILLink.targets https://github.com/xamarin/xamarin-android/blob/main/src/Xamarin.Android.Build.Tasks/Microsoft.Android.Sdk/targets/Microsoft.Android.Sdk.DefaultProperties.targets -->
+  <PropertyGroup Condition="'$(TargetOS)' == 'Android'">
+    <DebuggerSupport Condition="'$(DebuggerSupport)' == ''">false</DebuggerSupport>
+    <EnableUnsafeBinaryFormatterSerialization Condition="'$(EnableUnsafeBinaryFormatterSerialization)' == ''">false</EnableUnsafeBinaryFormatterSerialization>
+    <InvariantGlobalization Condition="'$(InvariantGlobalization)' != 'true'"></InvariantGlobalization>
+    <StartupHookSupport Condition="'$(StartupHookSupport)' == ''">false</StartupHookSupport>
+    <UseNativeHttpHandler Condition="'$(UseNativeHttpHandler)' == ''">true</UseNativeHttpHandler>
+  </PropertyGroup>
+
+  <!-- Modeled after Microsoft.NET.Sdk.BlazorWebAssembly.Current.targets https://github.com/dotnet/sdk/blob/main/src/BlazorWasmSdk/Targets/Microsoft.NET.Sdk.BlazorWebAssembly.Current.targets -->
+  <PropertyGroup Condition="'$(TargetOS)' == 'Browser'">
+    <DebuggerSupport Condition="'$(DebuggerSupport)' == '' and '$(Configuration)' != 'Debug'">false</DebuggerSupport>
+    <InvariantGlobalization Condition="'$(InvariantGlobalization)' == ''">false</InvariantGlobalization>
+  </PropertyGroup>
+
+  <!-- Modeled after Xamarin.Shared.Sdk.targets https://github.com/xamarin/xamarin-macios/blob/main/dotnet/targets/Xamarin.Shared.Sdk.targets -->
+  <PropertyGroup Condition="'$(TargetOS)' == 'iOS' or '$(TargetOS)' == 'tvOS' or '$(TargetOS)' == 'MacCatalyst'">
+    <CustomResourceTypesSupport Condition="'$(CustomResourceTypesSupport)' == ''">false</CustomResourceTypesSupport>
+    <DebuggerSupport Condition="'$(DebuggerSupport)' == '' and '$(Configuration)' == 'Debug'">true</DebuggerSupport>
+    <DebuggerSupport Condition="'$(DebuggerSupport)' == ''">false</DebuggerSupport>
+    <EnableUnsafeBinaryFormatterInDesigntimeLicenseContextSerialization Condition="'$(EnableUnsafeBinaryFormatterInDesigntimeLicenseContextSerialization)' == ''">false</EnableUnsafeBinaryFormatterInDesigntimeLicenseContextSerialization>
+    <EnableUnsafeBinaryFormatterSerialization Condition="'$(EnableUnsafeBinaryFormatterSerialization)' == ''">false</EnableUnsafeBinaryFormatterSerialization>
+    <InvariantGlobalization Condition="'$(TargetOS)' == 'MacCatalyst' and '$(InvariantGlobalization)' == ''">true</InvariantGlobalization>
+    <StartupHookSupport Condition="'$(StartupHookSupport)' == ''">false</StartupHookSupport>
+    <UseNativeHttpHandler Condition="'$(UseNativeHttpHandler)' == ''">true</UseNativeHttpHandler>
+  </PropertyGroup>
+
   <Import Project="..\..\libraries\Directory.Build.props" />
 </Project>