diff --git a/src/libraries/System.Runtime/tests/System/Reflection/NullabilityInfoContextTests.cs b/src/libraries/System.Runtime/tests/System/Reflection/NullabilityInfoContextTests.cs
index 7dd057d8cca0a..d67357b9e279b 100644
--- a/src/libraries/System.Runtime/tests/System/Reflection/NullabilityInfoContextTests.cs
+++ b/src/libraries/System.Runtime/tests/System/Reflection/NullabilityInfoContextTests.cs
@@ -759,7 +759,7 @@ public void NullablePublicOnlyOtherTypesTest()
             Assert.Equal(NullabilityState.Nullable, info.ReadState);
             Assert.Equal(NullabilityState.Nullable, info.WriteState);
 
-            privateNullableField = regexType.GetField("_code", flags)!;
+            privateNullableField = regexType.GetField("_runner", flags)!;
             info = nullabilityContext.Create(privateNullableField);
             Assert.Equal(NullabilityState.Unknown, info.ReadState);
             Assert.Equal(NullabilityState.Unknown, info.WriteState);