diff --git a/tests/units.svg b/tests/units.svg
new file mode 100644
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--- /dev/null
+++ b/tests/units.svg
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+  <rect width="200" height="100" fill="blue" style="stroke-width:-0.000000000006e+14em" />
+  <rect width="200" height="100" fill="blue" style="stroke-width:4%" />
+</svg>
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diff --git a/tests/viewbox.svg b/tests/viewbox.svg
new file mode 100644
index 0000000..611da97
--- /dev/null
+++ b/tests/viewbox.svg
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+<svg xmlns="http://www.w3.org/2000/svg" width="100%" height="50%" viewBox="-10.0,0 300 200">
+  <rect width="200" height="100" fill="blue"/>
+</svg>
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diff --git a/tests/wifi.svg b/tests/wifi.svg
new file mode 100644
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