diff --git a/src/libraries/Microsoft.Extensions.Configuration.Binder/tests/ConfigurationBinderTests.cs b/src/libraries/Microsoft.Extensions.Configuration.Binder/tests/ConfigurationBinderTests.cs
index d4014ad734fe9..c5dbd9d90821a 100644
--- a/src/libraries/Microsoft.Extensions.Configuration.Binder/tests/ConfigurationBinderTests.cs
+++ b/src/libraries/Microsoft.Extensions.Configuration.Binder/tests/ConfigurationBinderTests.cs
@@ -401,6 +401,7 @@ public void GetUri()
// enum test
[InlineData("Constructor", typeof(AttributeTargets))]
[InlineData("CA761232-ED42-11CE-BACD-00AA0057B223", typeof(Guid))]
+ [ActiveIssue("https://github.com/dotnet/runtime/issues/51211", typeof(PlatformDetection), nameof(PlatformDetection.IsBuiltWithAggressiveTrimming), nameof(PlatformDetection.IsBrowser))]
public void CanReadAllSupportedTypes(string value, Type type)
{
// arrange
@@ -447,6 +448,7 @@ public void CanReadAllSupportedTypes(string value, Type type)
[InlineData(typeof(TimeSpan))]
[InlineData(typeof(AttributeTargets))]
[InlineData(typeof(Guid))]
+ [ActiveIssue("https://github.com/dotnet/runtime/issues/51211", typeof(PlatformDetection), nameof(PlatformDetection.IsBuiltWithAggressiveTrimming), nameof(PlatformDetection.IsBrowser))]
public void ConsistentExceptionOnFailedBinding(Type type)
{
// arrange
diff --git a/src/libraries/System.Reflection.Emit.Lightweight/tests/DynamicMethodCtor.cs b/src/libraries/System.Reflection.Emit.Lightweight/tests/DynamicMethodCtor.cs
index 45edc4b8323a7..28429f8d71e89 100644
--- a/src/libraries/System.Reflection.Emit.Lightweight/tests/DynamicMethodCtor.cs
+++ b/src/libraries/System.Reflection.Emit.Lightweight/tests/DynamicMethodCtor.cs
@@ -25,6 +25,7 @@ public class DynamicMethodctor1
[InlineData("method", typeof(string), new Type[] { typeof(char?) })]
[InlineData("Method", typeof(string), new Type[] { typeof(GenericClass2<,>), typeof(GenericClass2<,>) })]
[InlineData("Method", typeof(string), new Type[] { typeof(TestInterface) })]
+ [ActiveIssue("https://github.com/dotnet/runtime/issues/51211", typeof(PlatformDetection), nameof(PlatformDetection.IsBuiltWithAggressiveTrimming), nameof(PlatformDetection.IsBrowser))]
public void String_Type_TypeArray_Module(string name, Type returnType, Type[] parameterTypes)
{
Module module = typeof(TestClass).GetTypeInfo().Module;
diff --git a/src/libraries/System.Reflection.TypeExtensions/tests/ConstructorInfo/ConstructorInfoTests.cs b/src/libraries/System.Reflection.TypeExtensions/tests/ConstructorInfo/ConstructorInfoTests.cs
index 5ce72bed4c751..fdeb799ac5eba 100644
--- a/src/libraries/System.Reflection.TypeExtensions/tests/ConstructorInfo/ConstructorInfoTests.cs
+++ b/src/libraries/System.Reflection.TypeExtensions/tests/ConstructorInfo/ConstructorInfoTests.cs
@@ -80,6 +80,7 @@ public void TypeConstructorName_ReturnsExpected()
[Theory]
[InlineData(typeof(ConstructorInfoInvoke), new Type[] { typeof(int) })]
[InlineData(typeof(string), new Type[] { typeof(char), typeof(int) })]
+ [ActiveIssue("https://github.com/dotnet/runtime/issues/51211", typeof(PlatformDetection), nameof(PlatformDetection.IsBuiltWithAggressiveTrimming), nameof(PlatformDetection.IsBrowser))]
public void Properties(Type type, Type[] typeParameters)
{
ConstructorInfo constructor = TypeExtensions.GetConstructor(type, typeParameters);
diff --git a/src/libraries/System.Runtime.CompilerServices.VisualC/tests/System/Runtime/CompilerServices/RequiredAttributeAttributeTests.cs b/src/libraries/System.Runtime.CompilerServices.VisualC/tests/System/Runtime/CompilerServices/RequiredAttributeAttributeTests.cs
index e1788cd1426e7..75c6897702590 100644
--- a/src/libraries/System.Runtime.CompilerServices.VisualC/tests/System/Runtime/CompilerServices/RequiredAttributeAttributeTests.cs
+++ b/src/libraries/System.Runtime.CompilerServices.VisualC/tests/System/Runtime/CompilerServices/RequiredAttributeAttributeTests.cs
@@ -10,6 +10,7 @@ public class RequiredAttributeAttributeTests
[Theory]
[InlineData(null)]
[InlineData(typeof(int))]
+ [ActiveIssue("https://github.com/dotnet/runtime/issues/51211", typeof(PlatformDetection), nameof(PlatformDetection.IsBuiltWithAggressiveTrimming), nameof(PlatformDetection.IsBrowser))]
public void Ctor_RequiredContract(Type requiredContract)
{
var attribute = new RequiredAttributeAttribute(requiredContract);
diff --git a/src/libraries/tests.proj b/src/libraries/tests.proj
index 5e8f9b5cf4ff4..1673ba28e966f 100644
--- a/src/libraries/tests.proj
+++ b/src/libraries/tests.proj
@@ -243,12 +243,6 @@
-
-
-
-
-
-