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diff --git a/tests/suite/foundations/content.typ b/tests/suite/foundations/content.typ
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+--- content-at-default ---
+// Test .at() default values for content.
+#test(auto, [a].at("doesn't exist", default: auto))
+
+--- content-field-syntax ---
+// Test fields on elements.
+#show list: it => {
+  test(it.children.len(), 3)
+}
+
+- A
+- B
+- C
+
+--- content-field-missing ---
+// Error: 25-28 content does not contain field "fun"
+#show heading: it => it.fun
+= A
+
+--- content-fields ---
+// Test content fields method.
+#test([a].fields(), (text: "a"))
+#test([a *b*].fields(),  (children: ([a], [ ], strong[b])))
+
+--- content-fields-mutable-invalid ---
+#{
+  let object = [hi]
+  // Error: 3-9 cannot mutate fields on content
+  object.property = "value"
+}
+
+--- content-field-materialized-table ---
+// Ensure that fields from set rules are materialized into the element before
+// a show rule runs.
+#set table(columns: (10pt, auto))
+#show table: it => it.columns
+#table[A][B][C][D]
+
+--- content-field-materialized-heading ---
+// Test it again with a different element.
+#set heading(numbering: "(I)")
+#show heading: set text(size: 11pt, weight: "regular")
+#show heading: it => it.numbering
+= Heading
+
+--- content-field-materialized-query ---
+// Test it with query.
+#set raw(lang: "rust")
+#context query(<myraw>).first().lang
+`raw` <myraw>
+
+--- content-fields-complex ---
+// Integrated test for content fields.
+#let compute(equation, ..vars) = {
+  let vars = vars.named()
+  let f(elem) = {
+    let func = elem.func()
+    if func == text {
+      let text = elem.text
+      if regex("^\d+$") in text {
+        int(text)
+      } else if text in vars {
+        int(vars.at(text))
+      } else {
+        panic("unknown math variable: " + text)
+      }
+    } else if func == math.attach {
+      let value = f(elem.base)
+      if elem.has("t") {
+        value = calc.pow(value, f(elem.t))
+      }
+      value
+    } else if elem.has("children") {
+      elem
+        .children
+        .filter(v => v != [ ])
+        .split[+]
+        .map(xs => xs.fold(1, (prod, v) => prod * f(v)))
+        .fold(0, (sum, v) => sum + v)
+    }
+  }
+  let result = f(equation.body)
+  [With ]
+  vars
+    .pairs()
+    .map(p => $#p.first() = #p.last()$)
+    .join(", ", last: " and ")
+  [ we have:]
+  $ equation = result $
+}
+
+#compute($x y + y^2$, x: 2, y: 3)
+
+--- content-label-has-method ---
+// Test whether the label is accessible through the `has` method.
+#show heading: it => {
+  assert(it.has("label"))
+  it
+}
+
+= Hello, world! <my-label>
+
+--- content-label-field-access ---
+// Test whether the label is accessible through field syntax.
+#show heading: it => {
+  assert(str(it.label) == "my-label")
+  it
+}
+
+= Hello, world! <my-label>
+
+--- content-label-fields-method ---
+// Test whether the label is accessible through the fields method.
+#show heading: it => {
+  assert("label" in it.fields())
+  assert(str(it.fields().label) == "my-label")
+  it
+}
+
+= Hello, world! <my-label>