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diff --git a/tests/wpt/css-tests/css-variables-1_dev/html/variable-reference-without-whitespace.htm b/tests/wpt/css-tests/css-variables-1_dev/html/variable-reference-without-whitespace.htm
new file mode 100644
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+++ b/tests/wpt/css-tests/css-variables-1_dev/html/variable-reference-without-whitespace.htm
@@ -0,0 +1,53 @@
+<!DOCTYPE html>
+<html><head><title>Variable reference without whitespace</title>
+<link href="reference/variable-reference-without-whitespace-ref.htm" rel="match">
+<link href="http://www.w3.org/TR/css-variables-1/#syntax" rel="help">
+<link href="http://exyr.org/about/" rel="author" title="Simon Sapin">
+<meta content="
+    A variable reference followed by something without whitespace in between
+    must not be interpreted together as a single identifier.
+    Custom property values are sequences of tokens, not strings." rel="assert">
+<style>
+p {
+    counter-reset: -- --a -a;
+    --dash:-;
+}
+
+#test_1 span::before {
+    counter-increment: var(--dash)-;
+    content: counter(--);
+}
+#test_2 span::before {
+    counter-increment: var(--dash)-a;
+    content: counter(--a);
+}
+#test_3 span::before {
+    counter-increment: var(--dash)a;
+    content: counter(-a);
+}
+
+#control_1 span::before {
+    counter-increment: --;
+    content: counter(--);
+}
+#control_2 span::before {
+    counter-increment: --a;
+    content: counter(--a);
+}
+#control_3 span::before {
+    counter-increment: -a;
+    content: counter(-a);
+}
+</style>
+</head><body><p>The next four lines must be identical, containing only zeroes:
+</p><p id="test_1"><span></span> <span></span> <span></span>
+</p><p id="test_2"><span></span> <span></span> <span></span>
+</p><p id="test_3"><span></span> <span></span> <span></span>
+</p><p>0 0 0
+
+</p><p>The next four lines must be identical, containing increasing integers:
+</p><p id="control_1"><span></span> <span></span> <span></span>
+</p><p id="control_2"><span></span> <span></span> <span></span>
+</p><p id="control_3"><span></span> <span></span> <span></span>
+</p><p>1 2 3
+</p></body></html>
+\ No newline at end of file