diff --git a/spec/datetimeformat.html b/spec/datetimeformat.html
index f2192b2e..c67dd7fa 100644
--- a/spec/datetimeformat.html
+++ b/spec/datetimeformat.html
@@ -1301,7 +1301,6 @@ <h1>
         1. Let _offsetPenalty_ be 1.
         1. Let _bestScore_ be -∞.
         1. Let _bestFormat_ be *undefined*.
-        1. Assert: Type(_formats_) is List.
         1. For each element _format_ of _formats_, do
           1. Let _score_ be 0.
           1. For each property name _property_ shown in <emu-xref href="#table-datetimeformat-components"></emu-xref>, do