diff --git a/internal/wire/testdata/Subtract/foo/wire.go b/internal/wire/testdata/Subtract/foo/wire.go
index c3070b59..d2f23ea1 100644
--- a/internal/wire/testdata/Subtract/foo/wire.go
+++ b/internal/wire/testdata/Subtract/foo/wire.go
@@ -40,3 +40,10 @@ func injectFooBarService(name BarName, opts *FooOptions, bar *FakeBarService) *F
 		wire.Bind(new(BarService), new(*FakeBarService)),
 	))
 }
+
+func injectNone(name BarName, foo Foo, bar *FakeBarService) *FooBar {
+	panic(wire.Build(
+		wire.Subtract(SuperSet, new(Foo), new(BarService)),
+		wire.Bind(new(BarService), new(*FakeBarService)),
+	))
+}
diff --git a/internal/wire/testdata/Subtract/want/wire_gen.go b/internal/wire/testdata/Subtract/want/wire_gen.go
index 5093baa9..130671c0 100644
--- a/internal/wire/testdata/Subtract/want/wire_gen.go
+++ b/internal/wire/testdata/Subtract/want/wire_gen.go
@@ -32,3 +32,11 @@ func injectFooBarService(name BarName, opts *FooOptions, bar *FakeBarService) *F
 	}
 	return fooBar
 }
+
+func injectNone(name BarName, foo Foo, bar *FakeBarService) *FooBar {
+	fooBar := &FooBar{
+		BarService: bar,
+		Foo:        foo,
+	}
+	return fooBar
+}