diff --git a/layout/reftests/svg/dynamic-rect-01-ref.svg b/layout/reftests/svg/dynamic-rect-01-ref.svg
new file mode 100755
index 00000000000..2f8307a445a
--- /dev/null
+++ b/layout/reftests/svg/dynamic-rect-01-ref.svg
@@ -0,0 +1,13 @@
+<?xml version="1.0"?>
+<!--
+     Any copyright is dedicated to the Public Domain.
+     http://creativecommons.org/licenses/publicdomain/
+-->
+<svg version="1.1" xmlns="http://www.w3.org/2000/svg">
+	<title>Reference for dynamic rect changes</title>
+	<!-- From https://bugzilla.mozilla.org/show_bug.cgi?id=423998 -->
+	<rect x="50" y="100" width="50" height="50" fill="lime"/>
+	<rect x="200" y="100" width="50" height="50" fill="lime"/>
+	<rect x="50" y="200" width="50" height="50" fill="lime"/>
+	<rect x="200" y="200" width="50" height="50" fill="lime"/>
+</svg>
diff --git a/layout/reftests/svg/dynamic-rect-01.svg b/layout/reftests/svg/dynamic-rect-01.svg
new file mode 100755
index 00000000000..b00843e75ae
--- /dev/null
+++ b/layout/reftests/svg/dynamic-rect-01.svg
@@ -0,0 +1,24 @@
+<?xml version="1.0"?>
+<!--
+     Any copyright is dedicated to the Public Domain.
+     http://creativecommons.org/licenses/publicdomain/
+-->
+<svg version="1.1" xmlns="http://www.w3.org/2000/svg" onload="m();">
+	<title>Testcase for dynamic rect changes</title>
+	<!-- From https://bugzilla.mozilla.org/show_bug.cgi?id=423998 -->
+	<script>
+		function m() {
+		document.getElementById("rect1").setAttribute("fill", "lime");
+		document.getElementById("rect2").setAttribute("x", "50");
+		document.getElementById("rect3").setAttribute("transform", "translate(200,0)");
+		document.getElementById("rect4").removeAttribute("filter");
+		}
+	</script>
+	<filter id="shadow" filterUnits="objectBoundingBox">
+		<feGaussianBlur in="SourceAlpha" stdDeviation="5"/>
+	</filter>
+	<rect id="rect1" x="50" y="100" width="50" height="50" fill="red"/>
+	<rect id="rect2" x="0" y="200" width="50" height="50" fill="lime"/>
+	<rect id="rect3" x="0" y="100" width="50" height="50" fill="lime"/>
+	<rect id="rect4" x="200" y="200" width="50" height="50" filter="url(#shadow)" fill="lime"/>
+</svg>
diff --git a/layout/reftests/svg/dynamic-rect-02.svg b/layout/reftests/svg/dynamic-rect-02.svg
new file mode 100755
index 00000000000..5a1a440758d
--- /dev/null
+++ b/layout/reftests/svg/dynamic-rect-02.svg
@@ -0,0 +1,22 @@
+<?xml version="1.0"?>
+<!--
+     Any copyright is dedicated to the Public Domain.
+     http://creativecommons.org/licenses/publicdomain/
+-->
+<svg version="1.1" xmlns="http://www.w3.org/2000/svg" onload="m();">
+	<title>Testcase for dynamic rect changes with filters</title>
+	<!-- From https://bugzilla.mozilla.org/show_bug.cgi?id=423998 -->
+	<script>
+		function m() {
+		document.getElementById("rect1").setAttribute("x", "50");
+		document.getElementById("rect2").setAttribute("transform", "translate(200,0)");
+		document.getElementById("rect3").setAttribute("filter", "url(#shadow)");
+		}
+	</script>
+	<filter id="shadow" filterUnits="objectBoundingBox">
+		<feGaussianBlur in="SourceAlpha" stdDeviation="5"/>
+	</filter>
+	<rect id="rect1" x="0" y="100" width="50" height="50" filter="url(#shadow)" />
+	<rect id="rect2" x="0" y="100" width="50" height="50" filter="url(#shadow)" />
+	<rect id="rect3" x="50" y="200" width="50" height="50"/>
+</svg>
diff --git a/layout/reftests/svg/dynamic-rect-03.svg b/layout/reftests/svg/dynamic-rect-03.svg
new file mode 100755
index 00000000000..03c09bbb5fb
--- /dev/null
+++ b/layout/reftests/svg/dynamic-rect-03.svg
@@ -0,0 +1,22 @@
+<?xml version="1.0"?>
+<!--
+     Any copyright is dedicated to the Public Domain.
+     http://creativecommons.org/licenses/publicdomain/
+-->
+<svg version="1.1" xmlns="http://www.w3.org/2000/svg" onload="m();">
+	<title>Testcase for dynamic rect changes with filters</title>
+	<!-- From https://bugzilla.mozilla.org/show_bug.cgi?id=423998 -->
+	<script>
+		function m() {
+		document.getElementById("rect1").setAttribute("x", "50");
+		document.getElementById("rect2").setAttribute("transform", "translate(200,0)");
+		}
+	</script>
+	<filter id="shadow" filterUnits="objectBoundingBox">
+		<feGaussianBlur in="SourceAlpha" stdDeviation="5"/>
+	</filter>
+	<g filter="url(#shadow)">
+	<rect id="rect1" x="0" y="100" width="50" height="50"  />
+	<rect id="rect2" x="0" y="100" width="50" height="50" />
+	</g>
+</svg>
diff --git a/layout/reftests/svg/dynamic-text-02-ref.svg b/layout/reftests/svg/dynamic-text-02-ref.svg
new file mode 100755
index 00000000000..931a8fd176d
--- /dev/null
+++ b/layout/reftests/svg/dynamic-text-02-ref.svg
@@ -0,0 +1,18 @@
+<?xml version="1.0"?>
+<!--
+     Any copyright is dedicated to the Public Domain.
+     http://creativecommons.org/licenses/publicdomain/
+-->
+<svg version="1.1" xmlns="http://www.w3.org/2000/svg">
+	<title>Reference for dynamic text changes with filters</title>
+	<!-- From https://bugzilla.mozilla.org/show_bug.cgi?id=423998 -->
+	<filter id="shadow" filterUnits="objectBoundingBox">
+		<feGaussianBlur in="SourceAlpha" stdDeviation="5"/>
+	</filter>
+	<text x="50" y="100" font-size="50" filter="url(#shadow)">Test1</text>
+	<text x="200" y="100" font-size="50" filter="url(#shadow)">Test2</text>
+	<text x="50" y="200" font-size="50" filter="url(#shadow)">Test3</text>
+	<text x="200" y="200" font-size="50" filter="url(#shadow)">Test4</text>
+	<text x="50" y="300" font-size="50" filter="url(#shadow)">Test5</text>
+	<text x="200" y="300" font-size="50" filter="url(#shadow)">Test6</text>
+</svg>
diff --git a/layout/reftests/svg/dynamic-text-02.svg b/layout/reftests/svg/dynamic-text-02.svg
new file mode 100755
index 00000000000..55d3dcdc1cf
--- /dev/null
+++ b/layout/reftests/svg/dynamic-text-02.svg
@@ -0,0 +1,28 @@
+<?xml version="1.0"?>
+<!--
+     Any copyright is dedicated to the Public Domain.
+     http://creativecommons.org/licenses/publicdomain/
+-->
+<svg version="1.1" xmlns="http://www.w3.org/2000/svg" onload="m();">
+	<title>Testcase for dynamic text changes with filters</title>
+	<!-- From https://bugzilla.mozilla.org/show_bug.cgi?id=423998 -->
+	<script>
+		function m() {
+		document.getElementById("text1").firstChild.nodeValue = "Test1";
+		document.getElementById("text2").setAttribute("x", "200");
+		document.getElementById("text3").setAttribute("font-size", "50");
+		document.getElementById("text4").setAttribute("font-size", "50");
+		document.getElementById("text5").setAttribute("transform", "translate(50,0)");
+		document.getElementById("text6").setAttribute("filter", "url(#shadow)");
+		}
+	</script>
+	<filter id="shadow" filterUnits="objectBoundingBox">
+		<feGaussianBlur in="SourceAlpha" stdDeviation="5"/>
+	</filter>
+	<text id="text1" x="50" y="100" filter="url(#shadow)" font-size="50"> </text>
+	<text id="text2" x="0" y="100" filter="url(#shadow)" font-size="50">Test2</text>
+	<text id="text3" x="50" y="200" filter="url(#shadow)" font-size="5">Test3</text>
+	<text id="text4" x="200" y="200" filter="url(#shadow)" font-size="100">Test4</text>
+	<text id="text5" x="0" y="300" filter="url(#shadow)" font-size="50">Test5</text>
+	<text id="text6" x="200" y="300" font-size="50">Test6</text>
+</svg>
diff --git a/layout/reftests/svg/dynamic-text-03-ref.svg b/layout/reftests/svg/dynamic-text-03-ref.svg
new file mode 100755
index 00000000000..0214660129d
--- /dev/null
+++ b/layout/reftests/svg/dynamic-text-03-ref.svg
@@ -0,0 +1,19 @@
+<?xml version="1.0"?>
+<!--
+     Any copyright is dedicated to the Public Domain.
+     http://creativecommons.org/licenses/publicdomain/
+-->
+<svg version="1.1" xmlns="http://www.w3.org/2000/svg">
+	<title>Reference for dynamic text changes with filters</title>
+	<!-- From https://bugzilla.mozilla.org/show_bug.cgi?id=423998 -->
+	<filter id="shadow" filterUnits="objectBoundingBox">
+		<feGaussianBlur in="SourceAlpha" stdDeviation="5"/>
+	</filter>
+	<g filter="url(#shadow)">
+	    <text x="50" y="100" font-size="50">Test1</text>
+		<text x="200" y="100" font-size="50">Test2</text>
+		<text x="50" y="200" font-size="50">Test3</text>
+		<text x="200" y="200" font-size="50">Test4</text>
+		<text x="50" y="300" font-size="50">Test5</text>
+	</g>
+</svg>
diff --git a/layout/reftests/svg/dynamic-text-03.svg b/layout/reftests/svg/dynamic-text-03.svg
new file mode 100755
index 00000000000..889f88c812c
--- /dev/null
+++ b/layout/reftests/svg/dynamic-text-03.svg
@@ -0,0 +1,28 @@
+<?xml version="1.0"?>
+<!--
+     Any copyright is dedicated to the Public Domain.
+     http://creativecommons.org/licenses/publicdomain/
+-->
+<svg version="1.1" xmlns="http://www.w3.org/2000/svg" onload="m();">
+	<title>Testcase for dynamic text changes</title>
+	<!-- From https://bugzilla.mozilla.org/show_bug.cgi?id=423998 -->
+	<script>
+		function m() {
+		document.getElementById("text1").firstChild.nodeValue = "Test1";
+		document.getElementById("text2").setAttribute("x", "200");
+		document.getElementById("text3").setAttribute("font-size", "50");
+		document.getElementById("text4").setAttribute("font-size", "50");
+		document.getElementById("text5").setAttribute("transform", "translate(50,0)");
+		}
+	</script>
+	<filter id="shadow" filterUnits="objectBoundingBox">
+		<feGaussianBlur in="SourceAlpha" stdDeviation="5"/>
+	</filter>
+	<g filter="url(#shadow)" >
+        <text id="text1" x="50" y="100" font-size="50"> </text>
+	    <text id="text2" x="0" y="100" font-size="50">Test2</text>
+	    <text id="text3" x="50" y="200" font-size="5">Test3</text>
+	    <text id="text4" x="200" y="200" font-size="100">Test4</text>
+		<text id="text5" x="0" y="300" font-size="50">Test5</text>
+	</g>
+</svg>
diff --git a/layout/reftests/svg/reftest.list b/layout/reftests/svg/reftest.list
index c44b3959b35..16e1ae912ff 100755
--- a/layout/reftests/svg/reftest.list
+++ b/layout/reftests/svg/reftest.list
@@ -15,7 +15,13 @@ include moz-only/reftest.list
 == currentColor-02.svg pass.svg
 == currentColor-03.svg pass.svg
 == dynamic-link-style-01.svg pass.svg
+== dynamic-rect-01.svg dynamic-rect-01-ref.svg
+== dynamic-rect-02.svg dynamic-rect-02-ref.svg
+== dynamic-rect-03.svg dynamic-rect-03-ref.svg
 == dynamic-reflow-01.svg dynamic-reflow-01-ref.svg
+== dynamic-text-01.svg dynamic-text-01-ref.svg
+== dynamic-text-02.svg dynamic-text-02-ref.svg
+== dynamic-text-03.svg dynamic-text-03-ref.svg
 == fallback-color-01a.svg pass.svg
 == fallback-color-01b.svg pass.svg
 == fallback-color-02a.svg fallback-color-02-ref.svg