2 files changed, 3 insertions, 3 deletions

diff --git a/src/test/WixToolsetTest.CoreIntegration/ExtensionFixture.cs b/src/test/WixToolsetTest.CoreIntegration/ExtensionFixture.cs
index 4bc5b535..b75e8ad9 100644
--- a/src/test/WixToolsetTest.CoreIntegration/ExtensionFixture.cs
+++ b/src/test/WixToolsetTest.CoreIntegration/ExtensionFixture.cs
@@ -63,7 +63,7 @@ namespace WixToolsetTest.CoreIntegration
                 Assert.Equal(@"example.txt", fileTuple[FileTupleFields.Source].PreviousValue.AsPath().Path);
 
                 var example = section.Tuples.Where(t => t.Definition.Type == TupleDefinitionType.MustBeFromAnExtension).Single();
-                Assert.Equal("Foo", example.Id.Id);
+                Assert.Null(example.Id?.Id);
                 Assert.Equal("Foo", example[0].AsString());
                 Assert.Equal("Bar", example[1].AsString());
             }
diff --git a/src/test/WixToolsetTest.CoreIntegration/WixlibFixture.cs b/src/test/WixToolsetTest.CoreIntegration/WixlibFixture.cs
index 5f8a278e..c7af6439 100644
--- a/src/test/WixToolsetTest.CoreIntegration/WixlibFixture.cs
+++ b/src/test/WixToolsetTest.CoreIntegration/WixlibFixture.cs
@@ -168,7 +168,7 @@ namespace WixToolsetTest.CoreIntegration
                 Assert.Equal(@"example.txt", fileTuple[FileTupleFields.Source].PreviousValue.AsPath().Path);
 
                 var example = section.Tuples.Where(t => t.Definition.Type == TupleDefinitionType.MustBeFromAnExtension).Single();
-                Assert.Equal("Foo", example.Id.Id);
+                Assert.Null(example.Id?.Id);
                 Assert.Equal("Foo", example[0].AsString());
                 Assert.Equal("Bar", example[1].AsString());
             }
@@ -232,7 +232,7 @@ namespace WixToolsetTest.CoreIntegration
                 Assert.Equal(@"other.txt", fileTuples[1][FileTupleFields.Source].PreviousValue.AsPath().Path);
 
                 var examples = section.Tuples.Where(t => t.Definition.Type == TupleDefinitionType.MustBeFromAnExtension).ToArray();
-                Assert.Equal(new[] { "Foo", "Other" }, examples.Select(t => t.Id.Id).ToArray());
+                Assert.Equal(new string[] { null, null }, examples.Select(t => t.Id?.Id).ToArray());
                 Assert.Equal(new[] { "Foo", "Other" }, examples.Select(t => t.AsString(0)).ToArray());
                 Assert.Equal(new[] { "Bar", "Value" }, examples.Select(t => t[1].AsString()).ToArray());
             }