diff --git a/windows/svc/mgr/mgr_test.go b/windows/svc/mgr/mgr_test.go
index 9171f5bc..64c00330 100644
--- a/windows/svc/mgr/mgr_test.go
+++ b/windows/svc/mgr/mgr_test.go
@@ -80,6 +80,9 @@ func testConfig(t *testing.T, s *mgr.Service, should mgr.Config) mgr.Config {
 	if err != nil {
 		t.Fatalf("Config failed: %s", err)
 	}
+	if should.DelayedAutoStart != is.DelayedAutoStart {
+		t.Fatalf("config mismatch: DelayedAutoStart is %q, but should have %q", is.DelayedAutoStart, should.DelayedAutoStart)
+	}
 	if should.DisplayName != is.DisplayName {
 		t.Fatalf("config mismatch: DisplayName is %q, but should have %q", is.DisplayName, should.DisplayName)
 	}
@@ -257,6 +260,15 @@ func TestMyService(t *testing.T) {
 
 	testConfig(t, s, c)
 
+	c.StartType = mgr.StartAutomatic
+	c.DelayedAutoStart = mgr.ServiceDelayedAutoStartTrue
+	err = s.UpdateConfig(c)
+	if err != nil {
+		t.Fatalf("UpdateConfig failed: %v", err)
+	}
+
+	testConfig(t, s, c)
+
 	svcnames, err := m.ListServices()
 	if err != nil {
 		t.Fatalf("ListServices failed: %v", err)