diff --git a/tests/siparray.py b/tests/siparray.py
index 96aa44a..3478a3f 100644
--- a/tests/siparray.py
+++ b/tests/siparray.py
@@ -6,4 +6,10 @@
 
 volume = QCustom3DVolume()
 volume.setTextureData(a)
-a = volume.textureData()
\ No newline at end of file
+a = volume.textureData()
+
+# more voidptr tests
+v = sip.voidptr(None)
+v = sip.voidptr(b'123', 0)
+v = sip.voidptr(bytearray(b'123'), 0, False)
+v = sip.voidptr(v)