diff --git a/qrcode/image/svg.py b/qrcode/image/svg.py
index bf4bbc3b..c776d4dc 100644
--- a/qrcode/image/svg.py
+++ b/qrcode/image/svg.py
@@ -45,7 +45,8 @@ def new_image(self, **kwargs):
     def _svg(self, tag=ET.QName(_SVG_namespace, "svg")):
         dimension = self.mm(self.pixel_size)
         return ET.Element(
-            tag, version="1.1", width=dimension, height=dimension)
+            tag, version="1.1", width=dimension, height=dimension,
+            viewbox='0 0 %(d)s %(d)s' % {'d': dimension})
 
     def _rect(self, row, col, tag=ET.QName(_SVG_namespace, "rect")):
         x, y = self.pixel_box(row, col)[0]
@@ -77,32 +78,18 @@ def _write(self, stream):
                                         xml_declaration=True)
 
 
-class SvgPathImage(SvgFragmentImage):
+class SvgPathImage(SvgImage):
     """
     SVG image builder with one single <path> element (removes white spaces
-    between individual QR points)"""
+    between individual QR points).
+    """
 
-    SCALE = 1
-    UNITS = 'mm'
     QR_PATH_STYLE = 'fill:#000000;fill-opacity:1;fill-rule:nonzero;stroke:none'
 
     def __init__(self, border, width, box_size):
         self._points = set()
         super(SvgPathImage, self).__init__(border, width, box_size)
 
-    def _svg(self, tag=ET.QName("svg")):
-        dimension = self.width * self.SCALE + (2 * self.border * self.SCALE)
-
-        svg = ET.Element(
-            tag,
-            version="1.1",
-            width="{0}{units}".format(dimension, units=self.UNITS),
-            height="{0}{units}".format(dimension, units=self.UNITS),
-            viewBox="0 0 {s} {s}".format(s=dimension)
-        )
-        svg.set("xmlns", self._SVG_namespace)
-        return svg
-
     def drawrect(self, row, col):
         # (x, y)
         self._points.add((col, row))
@@ -110,18 +97,20 @@ def drawrect(self, row, col):
     def _generate_subpaths(self):
         """Generates individual QR points as subpaths"""
 
-        scale = self.SCALE
+        rect_size = self.mm(self.box_size, text=False)
 
         for point in self._points:
-            x_base = point[0] * scale + self.border * scale
-            y_base = point[1] * scale + self.border * scale
-
-            yield 'M {x0} {y0} L {x0} {y1} L {x1} {y1} L {x1} {y0} z'.format(
-                x0=x_base,
-                y0=y_base,
-                x1=x_base + scale,
-                y1=y_base + scale
-            )
+            x_base = self.mm((point[0]+self.border)*self.box_size*3, text=False)
+            y_base = self.mm((point[1]+self.border)*self.box_size*3, text=False)
+
+            yield (
+                'M %(x0)s %(y0)s L %(x0)s %(y1)s L %(x1)s %(y1)s L %(x1)s '
+                '%(y0)s z' % dict(
+                    x0=x_base,
+                    y0=y_base,
+                    x1=x_base + rect_size,
+                    y1=y_base + rect_size,
+                ))
 
     def make_path(self):
         subpaths = self._generate_subpaths()
@@ -135,5 +124,4 @@ def make_path(self):
 
     def _write(self, stream):
         self._img.append(self.make_path())
-        ET.ElementTree(self._img).write(stream,
-                                        encoding="UTF-8", xml_declaration=True)
+        super(SvgPathImage, self)._write(stream)
diff --git a/qrcode/tests.py b/qrcode/tests.py
index c9bfcfe0..6e2557ee 100644
--- a/qrcode/tests.py
+++ b/qrcode/tests.py
@@ -71,6 +71,11 @@ def test_render_svg(self):
         qr.add_data(UNICODE_TEXT)
         qr.make_image(image_factory=qrcode.image.svg.SvgImage)
 
+    def test_render_svg_path(self):
+        qr = qrcode.QRCode()
+        qr.add_data(UNICODE_TEXT)
+        qr.make_image(image_factory=qrcode.image.svg.SvgPathImage)
+
     @unittest.skipIf(ANCIENT_PYTHON, "Only Python 2.6 and greater")
     def test_render_pymaging_png(self):
         qr = qrcode.QRCode()