diff --git a/tests/images/svg/circle01.svg b/tests/images/svg/circle01.svg
index bf71ce9..539560f 100644
--- a/tests/images/svg/circle01.svg
+++ b/tests/images/svg/circle01.svg
@@ -1,5 +1,5 @@
 <?xml version="1.0" standalone="no"?>
-<svg width="12cm" height="4cm" viewBox="0 0 1200 400"
+<svg viewBox="0 0 1200 400"
      xmlns="http://www.w3.org/2000/svg" version="1.1">
   <desc>Example circle01 - circle filled with red and stroked with blue</desc>
 
diff --git a/tests/images/svg/dashes.svg b/tests/images/svg/dashes.svg
index cb340e7..6509da1 100644
--- a/tests/images/svg/dashes.svg
+++ b/tests/images/svg/dashes.svg
@@ -1,20 +1,22 @@
-<svg viewBox="0 0 600 200" transform="scale(20, 20)" xmlns="http://www.w3.org/2000/svg">
+<svg viewBox="0 0 600 200" xmlns="http://www.w3.org/2000/svg">
+  <rect width="600" height="200" fill="white"/>
+
   <!-- No dashes nor gaps -->
-  <line x1="0" y1="1" x2="30" y2="1" stroke="black" />
+  <line x1="0" y1="20" x2="600" y2="20" stroke="black" stroke-width="20" />
 
   <!-- Dashes and gaps of the same size -->
-  <line x1="0" y1="3" x2="30" y2="3" stroke="black"
-          stroke-dasharray="4" />
+  <line x1="0" y1="60" x2="600" y2="60" stroke="black"
+          stroke-dasharray="80" stroke-width="20" />
 
   <!-- Dashes and gaps of different sizes -->
-  <line x1="0" y1="5" x2="30" y2="5" stroke="black"
-          stroke-dasharray="4 1" />
+  <line x1="0" y1="100" x2="600" y2="100" stroke="black"
+          stroke-dasharray="80 20" stroke-width="20" />
 
   <!-- Dashes and gaps of various sizes with an odd number of values -->
-  <line x1="0" y1="7" x2="30" y2="7" stroke="black"
-          stroke-dasharray="4 1 2" />
+  <line x1="0" y1="140" x2="600" y2="140" stroke="black"
+          stroke-dasharray="80 20 40" stroke-width="20" />
 
   <!-- Dashes and gaps of various sizes with an even number of values -->
-  <line x1="0" y1="9" x2="30" y2="9" stroke="black"
-          stroke-dasharray="4 1 2 3" />
+  <line x1="0" y1="180" x2="600" y2="180" stroke="black"
+          stroke-dasharray="80 20 40 60" stroke-width="20" />
 </svg>
diff --git a/tests/images/svg/diffs/Ghostscript_Tiger.png b/tests/images/svg/diffs/Ghostscript_Tiger.png
new file mode 100644
index 0000000..fdb4006
Binary files /dev/null and b/tests/images/svg/diffs/Ghostscript_Tiger.png differ
diff --git a/tests/images/svg/diffs/circle01.png b/tests/images/svg/diffs/circle01.png
new file mode 100644
index 0000000..37ebc3f
Binary files /dev/null and b/tests/images/svg/diffs/circle01.png differ
diff --git a/tests/images/svg/diffs/dashes.png b/tests/images/svg/diffs/dashes.png
new file mode 100644
index 0000000..dadadf9
Binary files /dev/null and b/tests/images/svg/diffs/dashes.png differ
diff --git a/tests/images/svg/diffs/ellipse01.png b/tests/images/svg/diffs/ellipse01.png
new file mode 100644
index 0000000..74f9e9e
Binary files /dev/null and b/tests/images/svg/diffs/ellipse01.png differ
diff --git a/tests/images/svg/diffs/line01.png b/tests/images/svg/diffs/line01.png
new file mode 100644
index 0000000..40abc2a
Binary files /dev/null and b/tests/images/svg/diffs/line01.png differ
diff --git a/tests/images/svg/diffs/miterlimit.png b/tests/images/svg/diffs/miterlimit.png
new file mode 100644
index 0000000..e680a74
Binary files /dev/null and b/tests/images/svg/diffs/miterlimit.png differ
diff --git a/tests/images/svg/diffs/polygon01.png b/tests/images/svg/diffs/polygon01.png
new file mode 100644
index 0000000..3c6543e
Binary files /dev/null and b/tests/images/svg/diffs/polygon01.png differ
diff --git a/tests/images/svg/diffs/polyline01.png b/tests/images/svg/diffs/polyline01.png
new file mode 100644
index 0000000..95a4575
Binary files /dev/null and b/tests/images/svg/diffs/polyline01.png differ
diff --git a/tests/images/svg/diffs/quad01.png b/tests/images/svg/diffs/quad01.png
new file mode 100644
index 0000000..d515fd4
Binary files /dev/null and b/tests/images/svg/diffs/quad01.png differ
diff --git a/tests/images/svg/diffs/rect01.png b/tests/images/svg/diffs/rect01.png
new file mode 100644
index 0000000..95a4575
Binary files /dev/null and b/tests/images/svg/diffs/rect01.png differ
diff --git a/tests/images/svg/diffs/rect02.png b/tests/images/svg/diffs/rect02.png
new file mode 100644
index 0000000..601ef6b
Binary files /dev/null and b/tests/images/svg/diffs/rect02.png differ
diff --git a/tests/images/svg/diffs/scale.png b/tests/images/svg/diffs/scale.png
new file mode 100644
index 0000000..5a8faeb
Binary files /dev/null and b/tests/images/svg/diffs/scale.png differ
diff --git a/tests/images/svg/diffs/triangle01.png b/tests/images/svg/diffs/triangle01.png
new file mode 100644
index 0000000..5a2af5e
Binary files /dev/null and b/tests/images/svg/diffs/triangle01.png differ
diff --git a/tests/images/svg/ellipse01.svg b/tests/images/svg/ellipse01.svg
index 8403ca4..efa5902 100644
--- a/tests/images/svg/ellipse01.svg
+++ b/tests/images/svg/ellipse01.svg
@@ -1,5 +1,5 @@
 <?xml version="1.0" standalone="no"?>
-<svg width="12cm" height="4cm" viewBox="0 0 1200 400"
+<svg viewBox="0 0 1200 400"
      xmlns="http://www.w3.org/2000/svg" version="1.1">
   <desc>Example ellipse01 - examples of ellipses</desc>
 
diff --git a/tests/images/svg/line01.svg b/tests/images/svg/line01.svg
index bb1d2bf..a5e791c 100644
--- a/tests/images/svg/line01.svg
+++ b/tests/images/svg/line01.svg
@@ -1,5 +1,5 @@
 <?xml version="1.0" standalone="no"?>
-<svg width="12cm" height="4cm" viewBox="0 0 1200 400"
+<svg viewBox="0 0 1200 400"
      xmlns="http://www.w3.org/2000/svg" version="1.1">
   <desc>Example line01 - lines expressed in user coordinates</desc>
 
diff --git a/tests/images/svg/masters/Ghostscript_Tiger.png b/tests/images/svg/masters/Ghostscript_Tiger.png
new file mode 100644
index 0000000..a90a620
Binary files /dev/null and b/tests/images/svg/masters/Ghostscript_Tiger.png differ
diff --git a/tests/images/svg/masters/circle01.png b/tests/images/svg/masters/circle01.png
new file mode 100644
index 0000000..78a27d2
Binary files /dev/null and b/tests/images/svg/masters/circle01.png differ
diff --git a/tests/images/svg/masters/dashes.png b/tests/images/svg/masters/dashes.png
new file mode 100644
index 0000000..c16372e
Binary files /dev/null and b/tests/images/svg/masters/dashes.png differ
diff --git a/tests/images/svg/masters/ellipse01.png b/tests/images/svg/masters/ellipse01.png
new file mode 100644
index 0000000..8d5a3cb
Binary files /dev/null and b/tests/images/svg/masters/ellipse01.png differ
diff --git a/tests/images/svg/masters/line01.png b/tests/images/svg/masters/line01.png
new file mode 100644
index 0000000..76775fa
Binary files /dev/null and b/tests/images/svg/masters/line01.png differ
diff --git a/tests/images/svg/masters/miterlimit.png b/tests/images/svg/masters/miterlimit.png
new file mode 100644
index 0000000..c0492d4
Binary files /dev/null and b/tests/images/svg/masters/miterlimit.png differ
diff --git a/tests/images/svg/masters/polygon01.png b/tests/images/svg/masters/polygon01.png
new file mode 100644
index 0000000..7184dcf
Binary files /dev/null and b/tests/images/svg/masters/polygon01.png differ
diff --git a/tests/images/svg/masters/polyline01.png b/tests/images/svg/masters/polyline01.png
new file mode 100644
index 0000000..704f1e1
Binary files /dev/null and b/tests/images/svg/masters/polyline01.png differ
diff --git a/tests/images/svg/masters/quad01.png b/tests/images/svg/masters/quad01.png
new file mode 100644
index 0000000..6a52ce0
Binary files /dev/null and b/tests/images/svg/masters/quad01.png differ
diff --git a/tests/images/svg/masters/rect01.png b/tests/images/svg/masters/rect01.png
new file mode 100644
index 0000000..56dc90c
Binary files /dev/null and b/tests/images/svg/masters/rect01.png differ
diff --git a/tests/images/svg/masters/rect02.png b/tests/images/svg/masters/rect02.png
new file mode 100644
index 0000000..3b0fec2
Binary files /dev/null and b/tests/images/svg/masters/rect02.png differ
diff --git a/tests/images/svg/masters/scale.png b/tests/images/svg/masters/scale.png
new file mode 100644
index 0000000..debd4eb
Binary files /dev/null and b/tests/images/svg/masters/scale.png differ
diff --git a/tests/images/svg/masters/triangle01.png b/tests/images/svg/masters/triangle01.png
new file mode 100644
index 0000000..53a03f1
Binary files /dev/null and b/tests/images/svg/masters/triangle01.png differ
diff --git a/tests/images/svg/miterlimit.svg b/tests/images/svg/miterlimit.svg
index 82b9a32..fe14469 100644
--- a/tests/images/svg/miterlimit.svg
+++ b/tests/images/svg/miterlimit.svg
@@ -1,27 +1,24 @@
-<svg viewBox="0 0 760 600" transform="scale(20, 20)" xmlns="http://www.w3.org/2000/svg">
+<svg viewBox="0 0 760 600" xmlns="http://www.w3.org/2000/svg">
+  <rect width="760" height="600" fill="white"/>
+
   <!-- Impact of the default miter limit -->
-  <path stroke="black" fill="none" stroke-linejoin="miter" id="p1" d="M1,9 l7   ,-3 l7   ,3
-           m2,0 l3.5 ,-3 l3.5 ,3
-           m2,0 l2   ,-3 l2   ,3
-           m2,0 l0.75,-3 l0.75,3
-           m2,0 l0.5 ,-3 l0.5 ,3"></path>
+  <path stroke="black" fill="none" stroke-linejoin="miter" stroke-width="20" id="p1" d="M20,180 l140   ,-60 l140   ,60
+           m40,0 l70 ,-60 l140 ,60
+           m40,0 l40   ,-60 l40   ,60
+           m40,0 l15,-60 l30,60
+           m40,0 l10 ,-60 l20 ,60"></path>
 
   <!-- Impact of the smallest miter limit (1) -->
-  <path stroke="black" fill="none" stroke-linejoin="miter" stroke-miterlimit="1" id="p2" d="M1,19 l7   ,-3 l7   ,3
-           m2, 0 l3.5 ,-3 l3.5 ,3
-           m2, 0 l2   ,-3 l2   ,3
-           m2, 0 l0.75,-3 l0.75,3
-           m2, 0 l0.5 ,-3 l0.5 ,3"></path>
+  <path stroke="black" fill="none" stroke-linejoin="miter" stroke-width="20" stroke-miterlimit="1" id="p2" d="M20,380 l140   ,-60 l140   ,60
+           m40, 0 l70 ,-60 l140 ,60
+           m40, 0 l40   ,-60 l40   ,60
+           m40, 0 l15,-60 l15,60
+           m40, 0 l10 ,-60 l10 ,60"></path>
 
   <!-- Impact of a large miter limit (8) -->
-  <path stroke="black" fill="none" stroke-linejoin="miter" stroke-miterlimit="8" id="p3" d="M1,29 l7   ,-3 l7   ,3
-           m2, 0 l3.5 ,-3 l3.5 ,3
-           m2, 0 l2   ,-3 l2   ,3
-           m2, 0 l0.75,-3 l0.75,3
-           m2, 0 l0.5 ,-3 l0.5 ,3"></path>
-
-  <!-- the following pink lines highlight the position of the path for each stroke -->
-  <path stroke="pink" fill="none" stroke-width="0.05" d="M1, 9 l7,-3 l7,3 m2,0 l3.5,-3 l3.5,3 m2,0 l2,-3 l2,3 m2,0 l0.75,-3 l0.75,3 m2,0 l0.5,-3 l0.5,3
-           M1,19 l7,-3 l7,3 m2,0 l3.5,-3 l3.5,3 m2,0 l2,-3 l2,3 m2,0 l0.75,-3 l0.75,3 m2,0 l0.5,-3 l0.5,3
-           M1,29 l7,-3 l7,3 m2,0 l3.5,-3 l3.5,3 m2,0 l2,-3 l2,3 m2,0 l0.75,-3 l0.75,3 m2,0 l0.5,-3 l0.5,3"></path>
+  <path stroke="black" fill="none" stroke-linejoin="miter" stroke-width="20" stroke-miterlimit="8" id="p3" d="M20,580 l140   ,-60 l140   ,60
+           m40, 0 l70 ,-60 l140 ,60
+           m40, 0 l40   ,-60 l40   ,60
+           m40, 0 l15,-60 l15,60
+           m40, 0 l10 ,-60 l10 ,60"></path>
 </svg>
diff --git a/tests/images/svg/polygon01.svg b/tests/images/svg/polygon01.svg
index 900cf65..e34e5eb 100644
--- a/tests/images/svg/polygon01.svg
+++ b/tests/images/svg/polygon01.svg
@@ -1,5 +1,5 @@
 <?xml version="1.0" standalone="no"?>
-<svg width="12cm" height="4cm" viewBox="0 0 1200 400"
+<svg viewBox="0 0 1200 400"
      xmlns="http://www.w3.org/2000/svg" version="1.1">
   <desc>Example polygon01 - star and hexagon</desc>
 
diff --git a/tests/images/svg/polyline01.svg b/tests/images/svg/polyline01.svg
index 9ac958d..072665c 100644
--- a/tests/images/svg/polyline01.svg
+++ b/tests/images/svg/polyline01.svg
@@ -1,5 +1,5 @@
 <?xml version="1.0" standalone="no"?>
-<svg width="12cm" height="4cm" viewBox="0 0 1200 400"
+<svg viewBox="0 0 1200 400"
      xmlns="http://www.w3.org/2000/svg" version="1.1">
   <desc>Example polyline01 - increasingly larger bars</desc>
 
diff --git a/tests/images/svg/quad01.svg b/tests/images/svg/quad01.svg
index 0f30020..4e76dec 100644
--- a/tests/images/svg/quad01.svg
+++ b/tests/images/svg/quad01.svg
@@ -1,5 +1,5 @@
 <?xml version="1.0" standalone="no"?>
-<svg width="12cm" height="6cm" viewBox="0 0 1200 600"
+<svg viewBox="0 0 1200 600"
      xmlns="http://www.w3.org/2000/svg" version="1.1">
   <title>Example quad01 - quadratic Bézier commands in path data</title>
   <desc>Picture showing a "Q" a "T" command,
diff --git a/tests/images/svg/rect01.svg b/tests/images/svg/rect01.svg
index d61727e..dda4010 100644
--- a/tests/images/svg/rect01.svg
+++ b/tests/images/svg/rect01.svg
@@ -1,5 +1,5 @@
 <?xml version="1.0" standalone="no"?>
-<svg width="12cm" height="4cm" viewBox="0 0 1200 400"
+<svg viewBox="0 0 1200 400"
      xmlns="http://www.w3.org/2000/svg" version="1.1">
   <desc>Example rect01 - rectangle with sharp corners</desc>
 
diff --git a/tests/images/svg/rect02.svg b/tests/images/svg/rect02.svg
index b943ff4..63f6b18 100644
--- a/tests/images/svg/rect02.svg
+++ b/tests/images/svg/rect02.svg
@@ -1,5 +1,5 @@
 <?xml version="1.0" standalone="no"?>
-<svg width="12cm" height="4cm" viewBox="0 0 1200 400"
+<svg viewBox="0 0 1200 400"
      xmlns="http://www.w3.org/2000/svg" version="1.1">
   <desc>Example rect02 - rounded rectangles</desc>
 
diff --git a/tests/images/svg/rendered/dashes.png b/tests/images/svg/rendered/dashes.png
index 204257b..53d22e8 100644
Binary files a/tests/images/svg/rendered/dashes.png and b/tests/images/svg/rendered/dashes.png differ
diff --git a/tests/images/svg/rendered/miterlimit.png b/tests/images/svg/rendered/miterlimit.png
index 75da14b..81195da 100644
Binary files a/tests/images/svg/rendered/miterlimit.png and b/tests/images/svg/rendered/miterlimit.png differ
diff --git a/tests/images/svg/triangle01.svg b/tests/images/svg/triangle01.svg
index ef65f9b..db30992 100644
--- a/tests/images/svg/triangle01.svg
+++ b/tests/images/svg/triangle01.svg
@@ -1,5 +1,5 @@
 <?xml version="1.0" standalone="no"?>
-<svg width="4cm" height="4cm" viewBox="0 0 400 400"
+<svg viewBox="0 0 400 400"
      xmlns="http://www.w3.org/2000/svg" version="1.1">
   <title>Example triangle01- simple example of a 'path'</title>
   <desc>A path that draws a triangle</desc>
diff --git a/tests/test_svg.nim b/tests/test_svg.nim
index f636644..d82449a 100644
--- a/tests/test_svg.nim
+++ b/tests/test_svg.nim
@@ -16,9 +16,13 @@ const files = [
   "dashes"
 ]
 
-for file in files:
+proc doDiff(rendered: Image, name: string) =
+  rendered.writeFile(&"tests/images/svg/rendered/{name}.png")
   let
-    original = readFile(&"tests/images/svg/{file}.svg")
-    image = decodeSvg(original)
+    master = readImage(&"tests/images/svg/masters/{name}.png")
+    (diffScore, diffImage) = diff(master, rendered)
+  echo &"{name} score: {diffScore}"
+  diffImage.writeFile(&"tests/images/svg/diffs/{name}.png")
 
-  image.writeFile(&"tests/images/svg/rendered/{file}.png")
+for file in files:
+  doDiff(decodeSvg(readFile(&"tests/images/svg/{file}.svg")), file)