diff --git a/src/tools/illink/test/Mono.Linker.Tests.Cases/Attributes.Debugger/KeepDebugMembers/DebuggerDisplayAttributeOnAssemblyUsingTarget.cs b/src/tools/illink/test/Mono.Linker.Tests.Cases/Attributes.Debugger/KeepDebugMembers/DebuggerDisplayAttributeOnAssemblyUsingTarget.cs
index f0c6c8cd4deefd..c25ab6697be52e 100644
--- a/src/tools/illink/test/Mono.Linker.Tests.Cases/Attributes.Debugger/KeepDebugMembers/DebuggerDisplayAttributeOnAssemblyUsingTarget.cs
+++ b/src/tools/illink/test/Mono.Linker.Tests.Cases/Attributes.Debugger/KeepDebugMembers/DebuggerDisplayAttributeOnAssemblyUsingTarget.cs
@@ -10,9 +10,6 @@
 namespace Mono.Linker.Tests.Cases.Attributes.Debugger.KeepDebugMembers
 {
 	[SetupLinkerTrimMode ("link")]
-#if !NET
-	[SetupLinkerKeepDebugMembers ("true")]
-#endif
 
 	[KeptMemberInAssembly (PlatformAssemblies.CoreLib, typeof (DebuggerDisplayAttribute), ".ctor(System.String)")]
 	[KeptMemberInAssembly (PlatformAssemblies.CoreLib, typeof (DebuggerDisplayAttribute), "set_Target(System.Type)")]
diff --git a/src/tools/illink/test/Mono.Linker.Tests.Cases/Attributes.Debugger/KeepDebugMembers/DebuggerDisplayAttributeOnAssemblyUsingTargetTypeNameInSameAssembly.cs b/src/tools/illink/test/Mono.Linker.Tests.Cases/Attributes.Debugger/KeepDebugMembers/DebuggerDisplayAttributeOnAssemblyUsingTargetTypeNameInSameAssembly.cs
index e6da349605d78b..67222da4fe71d5 100644
--- a/src/tools/illink/test/Mono.Linker.Tests.Cases/Attributes.Debugger/KeepDebugMembers/DebuggerDisplayAttributeOnAssemblyUsingTargetTypeNameInSameAssembly.cs
+++ b/src/tools/illink/test/Mono.Linker.Tests.Cases/Attributes.Debugger/KeepDebugMembers/DebuggerDisplayAttributeOnAssemblyUsingTargetTypeNameInSameAssembly.cs
@@ -9,9 +9,6 @@
 namespace Mono.Linker.Tests.Cases.Attributes.Debugger.KeepDebugMembers
 {
 	[SetupLinkerTrimMode ("link")]
-#if !NET
-	[SetupLinkerKeepDebugMembers ("true")]
-#endif
 
 	[KeptMemberInAssembly (PlatformAssemblies.CoreLib, typeof (DebuggerDisplayAttribute), ".ctor(System.String)")]
 	[KeptMemberInAssembly (PlatformAssemblies.CoreLib, typeof (DebuggerDisplayAttribute), "set_TargetTypeName(System.String)")]
diff --git a/src/tools/illink/test/Mono.Linker.Tests.Cases/Attributes.Debugger/KeepDebugMembers/DebuggerDisplayAttributeOnAssemblyUsingTargetTypeNameOfGenericTypeInOtherAssembly.cs b/src/tools/illink/test/Mono.Linker.Tests.Cases/Attributes.Debugger/KeepDebugMembers/DebuggerDisplayAttributeOnAssemblyUsingTargetTypeNameOfGenericTypeInOtherAssembly.cs
index 0f88184ecf3a70..573b3801d3d6dd 100644
--- a/src/tools/illink/test/Mono.Linker.Tests.Cases/Attributes.Debugger/KeepDebugMembers/DebuggerDisplayAttributeOnAssemblyUsingTargetTypeNameOfGenericTypeInOtherAssembly.cs
+++ b/src/tools/illink/test/Mono.Linker.Tests.Cases/Attributes.Debugger/KeepDebugMembers/DebuggerDisplayAttributeOnAssemblyUsingTargetTypeNameOfGenericTypeInOtherAssembly.cs
@@ -10,9 +10,6 @@
 namespace Mono.Linker.Tests.Cases.Attributes.Debugger.KeepDebugMembers
 {
 	[SetupLinkerTrimMode ("link")]
-#if !NET
-	[SetupLinkerKeepDebugMembers ("true")]
-#endif
 	[SetupCompileBefore ("library.dll", new[] { "../Dependencies/DebuggerDisplayAttributeOnAssemblyUsingTargetTypeNameInOtherAssembly_Lib.cs" })]
 
 	[KeptMemberInAssembly (PlatformAssemblies.CoreLib, typeof (DebuggerDisplayAttribute), ".ctor(System.String)")]
diff --git a/src/tools/illink/test/Mono.Linker.Tests.Cases/Attributes.Debugger/KeepDebugMembers/DebuggerDisplayAttributeOnTypeThatIsNotUsed.cs b/src/tools/illink/test/Mono.Linker.Tests.Cases/Attributes.Debugger/KeepDebugMembers/DebuggerDisplayAttributeOnTypeThatIsNotUsed.cs
index 8e65562af475ce..2cee192ba3f136 100644
--- a/src/tools/illink/test/Mono.Linker.Tests.Cases/Attributes.Debugger/KeepDebugMembers/DebuggerDisplayAttributeOnTypeThatIsNotUsed.cs
+++ b/src/tools/illink/test/Mono.Linker.Tests.Cases/Attributes.Debugger/KeepDebugMembers/DebuggerDisplayAttributeOnTypeThatIsNotUsed.cs
@@ -4,10 +4,6 @@
 
 namespace Mono.Linker.Tests.Cases.Attributes.Debugger.KeepDebugMembers
 {
-#if !NET
-	[SetupLinkerKeepDebugMembers ("true")]
-#endif
-
 	public class DebuggerDisplayAttributeOnTypeThatIsNotUsed
 	{
 		public static void Main ()
diff --git a/src/tools/illink/test/Mono.Linker.Tests.Cases/Attributes.Debugger/KeepDebugMembers/DebuggerDisplayOnTypeWithCallToExtensionMethodOnFieldType.cs b/src/tools/illink/test/Mono.Linker.Tests.Cases/Attributes.Debugger/KeepDebugMembers/DebuggerDisplayOnTypeWithCallToExtensionMethodOnFieldType.cs
index 6e13271e867904..8bc4bd9b21a867 100644
--- a/src/tools/illink/test/Mono.Linker.Tests.Cases/Attributes.Debugger/KeepDebugMembers/DebuggerDisplayOnTypeWithCallToExtensionMethodOnFieldType.cs
+++ b/src/tools/illink/test/Mono.Linker.Tests.Cases/Attributes.Debugger/KeepDebugMembers/DebuggerDisplayOnTypeWithCallToExtensionMethodOnFieldType.cs
@@ -7,9 +7,6 @@
 
 namespace Mono.Linker.Tests.Cases.Attributes.Debugger.KeepDebugMembers
 {
-#if !NET
-	[SetupLinkerKeepDebugMembers ("true")]
-#endif
 	public class DebuggerDisplayOnTypeWithCallToExtensionMethodOnFieldType
 	{
 		public static void Main ()
diff --git a/src/tools/illink/test/Mono.Linker.Tests.Cases/Attributes.Debugger/KeepDebugMembers/DebuggerDisplayOnTypeWithCallToMethodOnFieldType.cs b/src/tools/illink/test/Mono.Linker.Tests.Cases/Attributes.Debugger/KeepDebugMembers/DebuggerDisplayOnTypeWithCallToMethodOnFieldType.cs
index e2fe84975f7c57..27d556343f293d 100644
--- a/src/tools/illink/test/Mono.Linker.Tests.Cases/Attributes.Debugger/KeepDebugMembers/DebuggerDisplayOnTypeWithCallToMethodOnFieldType.cs
+++ b/src/tools/illink/test/Mono.Linker.Tests.Cases/Attributes.Debugger/KeepDebugMembers/DebuggerDisplayOnTypeWithCallToMethodOnFieldType.cs
@@ -4,9 +4,6 @@
 
 namespace Mono.Linker.Tests.Cases.Attributes.Debugger.KeepDebugMembers
 {
-#if !NET
-	[SetupLinkerKeepDebugMembers ("true")]
-#endif
 	public class DebuggerDisplayOnTypeWithCallToMethodOnFieldType
 	{
 		public static void Main ()