diff --git a/escpos/escpos.py b/escpos/escpos.py
index 6ff75bf..088cfe2 100644
--- a/escpos/escpos.py
+++ b/escpos/escpos.py
@@ -49,7 +49,7 @@ class Escpos(object):
         """
         pass
 
-    def image(self, img_source, high_density_vertical = True, high_density_horizontal = True, impl = "graphics"):
+    def image(self, img_source, high_density_vertical = True, high_density_horizontal = True, impl = "bitImageRaster"):
         """ Print an image
 
         :param img_source: PIL image or filename to load: `jpg`, `gif`, `png` or `bmp`
diff --git a/test/test_function_qr_native.py b/test/test_function_qr_native.py
index 8636e5e..7f24e42 100644
--- a/test/test_function_qr_native.py
+++ b/test/test_function_qr_native.py
@@ -76,10 +76,10 @@ def test_image():
     """Test QR as image"""
     instance = printer.Dummy()
     instance.qr("1", native=False, size=1)
-    expected = b'\x1d(LO\x000p0\x01\x011\x17\x00\x17\x00\x00\x00\x00\x7f]\xfcA' \
-        b'\x19\x04]it]et]ItA=\x04\x7fU\xfc\x00\x0c\x00y~t4\x7f =\xa84j\xd9\xf0' \
-        b'\x05\xd4\x90\x00i(\x7f<\xa8A \xd8]\'\xc4]y\xf8]E\x80Ar\x94\x7fR@\x00\x00' \
-        b'\x00\x1d(L\x02\x0002'
+    print(instance.output)
+    expected = b'\x1dv0\x00\x03\x00\x17\x00\x00\x00\x00\x7f]\xfcA\x19\x04]it]et' \
+        b']ItA=\x04\x7fU\xfc\x00\x0c\x00y~t4\x7f =\xa84j\xd9\xf0\x05\xd4\x90\x00' \
+        b'i(\x7f<\xa8A \xd8]\'\xc4]y\xf8]E\x80Ar\x94\x7fR@\x00\x00\x00'
     assert(instance.output == expected)
 
 @raises(ValueError)