diff --git a/layout/reftests/svg/sizing/canvas-drawImage-height-with-no-width-ref.html b/layout/reftests/svg/sizing/canvas-drawImage-height-with-no-width-ref.html
new file mode 100644
index 0000000000..f68abfeecf
--- /dev/null
+++ b/layout/reftests/svg/sizing/canvas-drawImage-height-with-no-width-ref.html
@@ -0,0 +1,22 @@
+<!DOCTYPE HTML>
+<html class="reftest-wait">
+<script src="svg-image-util.js"></script>
+<style>
+  canvas {
+    background: blue;
+  }
+</style>
+<body>
+  <script>
+    let viewBoxes = [null, "0 0 50 50", "0 0 50 20"];
+    let promises = [];
+    for (viewBox of viewBoxes) {
+      // Without a given width or height the svg should be sized as if a width
+      // of 300px and height of 150px were given.
+      promises.push(generateCanvasDrawImageSVG("350", "200", "300px", "200px", viewBox));
+    }
+    Promise.all(promises).then(() => { document.documentElement.className = "" });
+  </script>
+  <!-- Body gets populated by script -->
+</body>
+</html>
diff --git a/layout/reftests/svg/sizing/canvas-drawImage-height-with-no-width.html b/layout/reftests/svg/sizing/canvas-drawImage-height-with-no-width.html
new file mode 100644
index 0000000000..da4f20a2f9
--- /dev/null
+++ b/layout/reftests/svg/sizing/canvas-drawImage-height-with-no-width.html
@@ -0,0 +1,22 @@
+<!DOCTYPE HTML>
+<html class="reftest-wait">
+<script src="svg-image-util.js"></script>
+<style>
+  canvas {
+    background: blue;
+  }
+</style>
+<body>
+  <script>
+    let viewBoxes = [null, "0 0 50 50", "0 0 50 20"];
+    let promises = [];
+    for (viewBox of viewBoxes) {
+      // Without a given width or height the svg should be sized as if a width
+      // of 300px and height of 150px were given.
+      promises.push(generateCanvasDrawImageSVG("350", "200", null, "200px", viewBox));
+    }
+    Promise.all(promises).then(() => { document.documentElement.className = "" });
+  </script>
+  <!-- Body gets populated by script -->
+</body>
+</html>
diff --git a/layout/reftests/svg/sizing/canvas-drawImage-no-width-or-height-ref.html b/layout/reftests/svg/sizing/canvas-drawImage-no-width-or-height-ref.html
new file mode 100644
index 0000000000..045d626743
--- /dev/null
+++ b/layout/reftests/svg/sizing/canvas-drawImage-no-width-or-height-ref.html
@@ -0,0 +1,20 @@
+<!DOCTYPE HTML>
+<html class="reftest-wait">
+<script src="svg-image-util.js"></script>
+<style>
+  canvas {
+    background: blue;
+  }
+</style>
+<body>
+  <script>
+    let viewBoxes = [null, "0 0 50 50", "0 0 50 20"];
+    let promises = [];
+    for (viewBox of viewBoxes) {
+      promises.push(generateCanvasDrawImageSVG("350", "200", "300px", "150px", viewBox));
+    }
+    Promise.all(promises).then(() => { document.documentElement.className = "" });
+  </script>
+  <!-- Body gets populated by script -->
+</body>
+</html>
diff --git a/layout/reftests/svg/sizing/canvas-drawImage-no-width-or-height.html b/layout/reftests/svg/sizing/canvas-drawImage-no-width-or-height.html
new file mode 100644
index 0000000000..e5bc8c16ca
--- /dev/null
+++ b/layout/reftests/svg/sizing/canvas-drawImage-no-width-or-height.html
@@ -0,0 +1,22 @@
+<!DOCTYPE HTML>
+<html class="reftest-wait">
+<script src="svg-image-util.js"></script>
+<style>
+  canvas {
+    background: blue;
+  }
+</style>
+<body>
+  <script>
+    let viewBoxes = [null, "0 0 50 50", "0 0 50 20"];
+    let promises = [];
+    for (viewBox of viewBoxes) {
+      // Without a given width or height the svg should be sized as if a width
+      // of 300px and height of 150px were given.
+      promises.push(generateCanvasDrawImageSVG("350", "200", null, null, viewBox));
+    }
+    Promise.all(promises).then(() => { document.documentElement.className = "" });
+  </script>
+  <!-- Body gets populated by script -->
+</body>
+</html>
diff --git a/layout/reftests/svg/sizing/canvas-drawImage-width-with-no-height-ref.html b/layout/reftests/svg/sizing/canvas-drawImage-width-with-no-height-ref.html
new file mode 100644
index 0000000000..24d91d32c4
--- /dev/null
+++ b/layout/reftests/svg/sizing/canvas-drawImage-width-with-no-height-ref.html
@@ -0,0 +1,22 @@
+<!DOCTYPE HTML>
+<html class="reftest-wait">
+<script src="svg-image-util.js"></script>
+<style>
+  canvas {
+    background: blue;
+  }
+</style>
+<body>
+  <script>
+    let viewBoxes = [null, "0 0 50 50", "0 0 50 20"];
+    let promises = [];
+    for (viewBox of viewBoxes) {
+      // Without a given width or height the svg should be sized as if a width
+      // of 300px and height of 150px were given.
+      promises.push(generateCanvasDrawImageSVG("350", "200", "200px", "150px", viewBox));
+    }
+    Promise.all(promises).then(() => { document.documentElement.className = "" });
+  </script>
+  <!-- Body gets populated by script -->
+</body>
+</html>
diff --git a/layout/reftests/svg/sizing/canvas-drawImage-width-with-no-height.html b/layout/reftests/svg/sizing/canvas-drawImage-width-with-no-height.html
new file mode 100644
index 0000000000..7a4452face
--- /dev/null
+++ b/layout/reftests/svg/sizing/canvas-drawImage-width-with-no-height.html
@@ -0,0 +1,22 @@
+<!DOCTYPE HTML>
+<html class="reftest-wait">
+<script src="svg-image-util.js"></script>
+<style>
+  canvas {
+    background: blue;
+  }
+</style>
+<body>
+  <script>
+    let viewBoxes = [null, "0 0 50 50", "0 0 50 20"];
+    let promises = [];
+    for (viewBox of viewBoxes) {
+      // Without a given width or height the svg should be sized as if a width
+      // of 300px and height of 150px were given.
+      promises.push(generateCanvasDrawImageSVG("350", "200", "200px", null, viewBox));
+    }
+    Promise.all(promises).then(() => { document.documentElement.className = "" });
+  </script>
+  <!-- Body gets populated by script -->
+</body>
+</html>
diff --git a/layout/reftests/svg/sizing/reftest.list b/layout/reftests/svg/sizing/reftest.list
index 960b59d8d9..3e269c5a31 100644
--- a/layout/reftests/svg/sizing/reftest.list
+++ b/layout/reftests/svg/sizing/reftest.list
@@ -310,3 +310,8 @@ skip == dynamic--inline-resize-window-width.xhtml    pass.svg # Fails way too mu
 fails random-if(Android) == dynamic--object-svg-unloaded.xhtml     pass.svg
 # == dynamic--object--auto-auto--pct-px.html 
 
+# Note: Other web rendering engines do no not pass the following tests due
+# due to differences in surface calculations.
+== canvas-drawImage-no-width-or-height.html canvas-drawImage-no-width-or-height-ref.html
+== canvas-drawImage-width-with-no-height.html canvas-drawImage-width-with-no-height-ref.html
+== canvas-drawImage-height-with-no-width.html canvas-drawImage-height-with-no-width-ref.html
diff --git a/layout/reftests/svg/sizing/svg-image-util.js b/layout/reftests/svg/sizing/svg-image-util.js
new file mode 100644
index 0000000000..d58e622ec7
--- /dev/null
+++ b/layout/reftests/svg/sizing/svg-image-util.js
@@ -0,0 +1,74 @@
+/**
+ * Reusable SVG data uri prefix for generated SVGs.
+ */
+const SVG_DATA_URI_PREFIX = 'data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg"';
+/**
+ * Reusable SVG data uri suffix for generated SVGs.
+ */
+const SVG_DATA_URI_SUFFIX = '><rect fill="brown" x="-2000" y="-2000" width="4000" height="4000"></rect><rect fill="green" height="50" width="50"></rect><rect fill="yellow" x="10" y="10" height="30" width="30"></rect></svg>';
+
+/**
+ * Generates full data URI for an SVG document, with the given parameters
+ * on the SVG element.
+ *
+ * @param aWidth    The width attribute, or null for no width.
+ * @param aHeight   The height attribute, or null for no height.
+ * @param aViewbox  The viewBox attribute, or null for no viewBox.
+ */
+function generateSVGDataURI(aWidth, aHeight, aViewBox) {
+  let datauri = SVG_DATA_URI_PREFIX;
+
+  if (aWidth) {
+    datauri += " width=\"" + aWidth + "\""
+  }
+
+  if (aHeight) {
+    datauri += " height=\"" + aHeight + "\"";
+  }
+
+  if (aViewBox) {
+    datauri += " viewBox=\"" + aViewBox + "\"";
+  }
+
+  datauri += SVG_DATA_URI_SUFFIX;
+
+  return datauri;
+}
+
+/**
+ * Generates a canvas, with the given width and height parameters, and uses
+ * CanvasRenderingContext2D.drawImage() to draw a SVG image with the given
+ * width and height attributes.
+ *
+ * @param aCanvasWidth      The width attribute of the canvas.
+ * @param aCanvasHeight     The height attribute of the canvas.
+ * @param aSVGWidth         The width attribute of the svg, or null for no width.
+ * @param aSVGHeight        The height attribute of the svg, or null for no height.
+ * @param aSVGViewBox       The viewBox attribute sf the svg, or null for no viewBox.
+ *
+ * @returns A promise that resolves when the SVG image has been drawn to the
+ *          created canvas
+ */
+async function generateCanvasDrawImageSVG(aCanvasWidth, aCanvasHeight, aSVGWidth,
+                                          aSVGHeight, aSVGViewBox) {
+    let canvas = document.createElement("canvas");
+    let ctx = canvas.getContext("2d");
+    document.body.appendChild(canvas);
+
+    canvas.setAttribute("width", aCanvasWidth);
+    canvas.setAttribute("height", aCanvasHeight);
+
+    let img = document.createElement("img");
+
+    let promise = new Promise(resolve => {
+      img.onload = () => {
+        ctx.drawImage(img, 0, 0);
+        resolve();
+      };
+    });
+
+    let uri = generateSVGDataURI(aSVGWidth, aSVGHeight, aSVGViewBox);
+    img.src = uri;
+
+    return promise;
+}
