diff --git a/src/libraries/System.Private.Xml/tests/Writers/XmlWriterApi/TestExtensions.cs b/src/libraries/System.Private.Xml/tests/Writers/XmlWriterApi/TestExtensions.cs
index 66b3b4132b3..7e63b07839e 100644
--- a/src/libraries/System.Private.Xml/tests/Writers/XmlWriterApi/TestExtensions.cs
+++ b/src/libraries/System.Private.Xml/tests/Writers/XmlWriterApi/TestExtensions.cs
@@ -95,7 +95,7 @@ namespace System.Xml.XmlWriterApiTests
     }
 
     // Based on https://github.com/xunit/xunit/blob/bccfcccf26b2c63c90573fe1a17e6572882ef39c/src/xunit.core/InlineDataAttribute.cs
-    [DataDiscoverer("System.Xml.Tests.XmlWriterInlineDataDiscoverer", "System.Xml.RW.XmlWriterApi.Tests")]
+    [DataDiscoverer("System.Xml.XmlWriterApiTests.XmlWriterInlineDataDiscoverer", "System.Private.Xml.Tests")]
     [AttributeUsage(AttributeTargets.Method, AllowMultiple = true)]
     public sealed class XmlWriterInlineDataAttribute : DataAttribute
     {