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diff --git a/tests/suite/model/heading.typ b/tests/suite/model/heading.typ
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+// Test headings.
+
+--- heading-basic ---
+// Different number of equals signs.
+
+= Level 1
+== Level 2
+=== Level 3
+
+// After three, it stops shrinking.
+=========== Level 11
+
+--- heading-syntax-at-start ---
+// Heading vs. no heading.
+
+// Parsed as headings if at start of the context.
+/**/ = Level 1
+#[== Level 2]
+#box[=== Level 3]
+
+// Not at the start of the context.
+No = heading
+
+// Escaped.
+\= No heading
+
+--- heading-block ---
+// Blocks can continue the heading.
+
+= #[This
+is
+multiline.
+]
+
+= This
+  is not.
+
+--- heading-show-where ---
+// Test styling.
+#show heading.where(level: 5): it => block(
+  text(font: "Roboto", fill: eastern, it.body + [!])
+)
+
+= Heading
+===== Heading 🌍
+#heading(level: 5)[Heading]
+
+--- heading-offset ---
+// Test setting the starting offset.
+#set heading(numbering: "1.1")
+#show heading.where(level: 2): set text(blue)
+= Level 1
+
+#heading(depth: 1)[We're twins]
+#heading(level: 1)[We're twins]
+
+== Real level 2
+
+#set heading(offset: 1)
+= Fake level 2
+== Fake level 3
+
+--- heading-offset-and-level ---
+// Passing level directly still overrides all other set values
+#set heading(numbering: "1.1", offset: 1)
+#heading(level: 1)[Still level 1]
+
+--- heading-syntax-edge-cases ---
+// Edge cases.
+#set heading(numbering: "1.")
+=
+Not in heading
+=Nope
+
+--- heading-numbering-hint ---
+= Heading <intro>
+
+// Error: 1:20-1:26 cannot reference heading without numbering
+// Hint: 1:20-1:26 you can enable heading numbering with `#set heading(numbering: "1.")`
+Can not be used as @intro