diff --git a/src/Compilers/CSharp/Test/Semantic/IOperation/IOperationTests_ILambdaExpression.cs b/src/Compilers/CSharp/Test/Semantic/IOperation/IOperationTests_ILambdaExpression.cs
index 660dae827839d822b8659c62b8d411713ef36304..715f6e80305730b9062d3b62479306d0024a53c4 100644
--- a/src/Compilers/CSharp/Test/Semantic/IOperation/IOperationTests_ILambdaExpression.cs
+++ b/src/Compilers/CSharp/Test/Semantic/IOperation/IOperationTests_ILambdaExpression.cs
@@ -4,7 +4,7 @@
 
 namespace Microsoft.CodeAnalysis.CSharp.UnitTests
 {
-    internal partial class IOperationTests : SemanticModelTestBase
+    public partial class IOperationTests : SemanticModelTestBase
     {
         [Fact]
         public void ILambdaExpression_BoundLambda_HasValidLambdaExpressionTree()