diff --git a/testscour.py b/testscour.py
index fcbd837..c31d86a 100755
--- a/testscour.py
+++ b/testscour.py
@@ -880,67 +880,71 @@ class RemoveRedundantSvgNamespacePrefix(unittest.TestCase):
 
 class RemoveDefaultGradX1Value(unittest.TestCase):
 	def runTest(self):
-		g = scour.scourXmlFile('unittests/gradient-default-attrs.svg').getElementsByTagNameNS(SVGNS, 'linearGradient')[0]
+		g = scour.scourXmlFile('unittests/gradient-default-attrs.svg').getElementById('grad1')
 		self.assertEqual( g.getAttribute('x1'), '',
 			'x1="0" not removed')
 
 class RemoveDefaultGradY1Value(unittest.TestCase):
 	def runTest(self):
-		g = scour.scourXmlFile('unittests/gradient-default-attrs.svg').getElementsByTagNameNS(SVGNS, 'linearGradient')[0]
+		g = scour.scourXmlFile('unittests/gradient-default-attrs.svg').getElementById('grad1')
 		self.assertEqual( g.getAttribute('y1'), '',
 			'y1="0" not removed')
 
 class RemoveDefaultGradX2Value(unittest.TestCase):
 	def runTest(self):
-		g = scour.scourXmlFile('unittests/gradient-default-attrs.svg').getElementsByTagNameNS(SVGNS, 'linearGradient')[0]
-		self.assertEqual( g.getAttribute('x2'), '',
+		doc = scour.scourXmlFile('unittests/gradient-default-attrs.svg')
+		self.assertEqual( doc.getElementById('grad1').getAttribute('x2'), '',
 			'x2="100%" not removed')
+		self.assertEqual( doc.getElementById('grad1b').getAttribute('x2'), '',
+			'x2="1" not removed, which is equal to the default x2="100%" when gradientUnits="objectBoundingBox"')
+		self.assertNotEqual( doc.getElementById('grad1c').getAttribute('x2'), '',
+			'x2="1" removed, which is NOT equal to the default x2="100%" when gradientUnits="userSpaceOnUse"')
 
 class RemoveDefaultGradY2Value(unittest.TestCase):
 	def runTest(self):
-		g = scour.scourXmlFile('unittests/gradient-default-attrs.svg').getElementsByTagNameNS(SVGNS, 'linearGradient')[0]
+		g = scour.scourXmlFile('unittests/gradient-default-attrs.svg').getElementById('grad1')
 		self.assertEqual( g.getAttribute('y2'), '',
 			'y2="0" not removed')
 
 class RemoveDefaultGradGradientUnitsValue(unittest.TestCase):
 	def runTest(self):
-		g = scour.scourXmlFile('unittests/gradient-default-attrs.svg').getElementsByTagNameNS(SVGNS, 'linearGradient')[0]
+		g = scour.scourXmlFile('unittests/gradient-default-attrs.svg').getElementById('grad1')
 		self.assertEqual( g.getAttribute('gradientUnits'), '',
 			'gradientUnits="objectBoundingBox" not removed')
 
 class RemoveDefaultGradSpreadMethodValue(unittest.TestCase):
 	def runTest(self):
-		g = scour.scourXmlFile('unittests/gradient-default-attrs.svg').getElementsByTagNameNS(SVGNS, 'linearGradient')[0]
+		g = scour.scourXmlFile('unittests/gradient-default-attrs.svg').getElementById('grad1')
 		self.assertEqual( g.getAttribute('spreadMethod'), '',
 			'spreadMethod="pad" not removed')
 
 class RemoveDefaultGradCXValue(unittest.TestCase):
 	def runTest(self):
-		g = scour.scourXmlFile('unittests/gradient-default-attrs.svg').getElementsByTagNameNS(SVGNS, 'radialGradient')[0]
+		g = scour.scourXmlFile('unittests/gradient-default-attrs.svg').getElementById('grad2')
 		self.assertEqual( g.getAttribute('cx'), '',
 			'cx="50%" not removed')
 
 class RemoveDefaultGradCYValue(unittest.TestCase):
 	def runTest(self):
-		g = scour.scourXmlFile('unittests/gradient-default-attrs.svg').getElementsByTagNameNS(SVGNS, 'radialGradient')[0]
+		g = scour.scourXmlFile('unittests/gradient-default-attrs.svg').getElementById('grad2')
 		self.assertEqual( g.getAttribute('cy'), '',
 			'cy="50%" not removed')
 
 class RemoveDefaultGradRValue(unittest.TestCase):
 	def runTest(self):
-		g = scour.scourXmlFile('unittests/gradient-default-attrs.svg').getElementsByTagNameNS(SVGNS, 'radialGradient')[0]
+		g = scour.scourXmlFile('unittests/gradient-default-attrs.svg').getElementById('grad2')
 		self.assertEqual( g.getAttribute('r'), '',
 			'r="50%" not removed')
 
 class RemoveDefaultGradFXValue(unittest.TestCase):
 	def runTest(self):
-		g = scour.scourXmlFile('unittests/gradient-default-attrs.svg').getElementsByTagNameNS(SVGNS, 'radialGradient')[0]
+		g = scour.scourXmlFile('unittests/gradient-default-attrs.svg').getElementById('grad2')
 		self.assertEqual( g.getAttribute('fx'), '',
 			'fx matching cx not removed')
 
 class RemoveDefaultGradFYValue(unittest.TestCase):
 	def runTest(self):
-		g = scour.scourXmlFile('unittests/gradient-default-attrs.svg').getElementsByTagNameNS(SVGNS, 'radialGradient')[0]
+		g = scour.scourXmlFile('unittests/gradient-default-attrs.svg').getElementById('grad2')
 		self.assertEqual( g.getAttribute('fy'), '',
 			'fy matching cy not removed')
 
diff --git a/unittests/gradient-default-attrs.svg b/unittests/gradient-default-attrs.svg
index 36fd0e7..25cdb82 100644
--- a/unittests/gradient-default-attrs.svg
+++ b/unittests/gradient-default-attrs.svg
@@ -1,10 +1,21 @@
 <?xml version="1.0" encoding="UTF-8" standalone="no"?>
 <svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink">
-<linearGradient id="g" x1="0" y1='0' x2='100%' y2='0.0' gradientUnits="objectBoundingBox" spreadMethod="pad">
-  <stop offset="0" stop-color="black"/>
-  <stop offset="1" stop-color="white"/>
-</linearGradient>
-<radialGradient id="g2" xlink:href="#g1" cx="50%" cy="0.5" r="50%" fx="50%" fy="0.5"/>
-<rect width="100" height="100" fill="url(#g)"/>
-<rect width="50" height="50" fill="url(#g2)"/>
+  <linearGradient id="grad1" x1="0" y1='0' x2='100%' y2='0.0' gradientUnits="objectBoundingBox" spreadMethod="pad">
+    <stop offset="0" stop-color="black"/>
+    <stop offset="1" stop-color="white"/>
+  </linearGradient>
+  <linearGradient id="grad1b" x2='1.0' gradientUnits="objectBoundingBox">
+    <stop offset="0" stop-color="black"/>
+    <stop offset="1" stop-color="white"/>
+  </linearGradient>
+  <linearGradient id="grad1c" x2='1' gradientUnits="userSpaceOnUse">
+    <stop offset="0" stop-color="black"/>
+    <stop offset="1" stop-color="white"/>
+  </linearGradient>
+  <radialGradient id="grad2" xlink:href="#grad1" cx="50%" cy="0.5" r="50%" fx="50%" fy="0.5"/>
+  
+  <rect width="100" height="100" fill="url(#grad1)"/>
+  <rect width="100" height="100" fill="url(#grad1b)"/>
+  <rect width="100" height="100" fill="url(#grad1c)"/>
+  <rect width="50" height="50" fill="url(#grad2)"/>
 </svg>