diff --git a/tests/playground.html b/tests/playground.html
index 6bbe2b43f..21f7ba0e9 100644
--- a/tests/playground.html
+++ b/tests/playground.html
@@ -1060,6 +1060,71 @@ h1 {
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+ Drag me by this child
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+ Drag me by this shadow
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+ item
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+ item
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+ without arguments
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+ No argument reference.
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+ with one argument
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+ Expected an argument reference here.
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+ fnArgument
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+