diff --git a/app/headless/headless_test.go b/app/headless/headless_test.go
index 8fb60f7e..ab938a53 100644
--- a/app/headless/headless_test.go
+++ b/app/headless/headless_test.go
@@ -18,6 +18,7 @@ func TestHeadless(t *testing.T) {
 	if err != nil {
 		t.Skipf("headless windows not supported: %v", err)
 	}
+	defer w.Release()
 
 	col := color.RGBA{A: 0xff, R: 0xcc, G: 0xcc}
 	var ops op.Ops