diff --git a/src/tools/illink/test/Mono.Linker.Tests.Cases/Attributes/OnlyKeepUsed/NullableOnConstraints.cs b/src/tools/illink/test/Mono.Linker.Tests.Cases/Attributes/OnlyKeepUsed/NullableOnConstraints.cs
index b396bb3b10b56..b5efaa7dbcae0 100644
--- a/src/tools/illink/test/Mono.Linker.Tests.Cases/Attributes/OnlyKeepUsed/NullableOnConstraints.cs
+++ b/src/tools/illink/test/Mono.Linker.Tests.Cases/Attributes/OnlyKeepUsed/NullableOnConstraints.cs
@@ -7,6 +7,7 @@ namespace Mono.Linker.Tests.Cases.Attributes.OnlyKeepUsed
 {
 	[SetupCSharpCompilerToUse ("csc")]
 	[SetupLinkerArgument ("--used-attrs-only", "true")]
+	[SetupLinkerTrimMode ("link")]
 	public class NullableOnConstraints
 	{
 		public static void Main ()
diff --git a/src/tools/illink/test/Mono.Linker.Tests.Cases/LinqExpressions/CanPreserveNullableCustomOperators.cs b/src/tools/illink/test/Mono.Linker.Tests.Cases/LinqExpressions/CanPreserveNullableCustomOperators.cs
index 32398f667348c..ec676fe133221 100644
--- a/src/tools/illink/test/Mono.Linker.Tests.Cases/LinqExpressions/CanPreserveNullableCustomOperators.cs
+++ b/src/tools/illink/test/Mono.Linker.Tests.Cases/LinqExpressions/CanPreserveNullableCustomOperators.cs
@@ -5,6 +5,7 @@ namespace Mono.Linker.Tests.Cases.LinqExpressions
 {
 	[SetupCompileArgument ("/unsafe")]
 	[SetupLinkerArgument ("--used-attrs-only")]
+	[SetupLinkerTrimMode ("link")]
 	public class CanPreserveNullableCustomOperators
 	{
 		public static void Main ()