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diff --git a/tests/typ/expr/prec.typ b/tests/typ/expr/prec.typ
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+// Test operator precedence.
+// Ref: false
+
+---
+// Multiplication binds stronger than addition.
+#test(1+2*-3, -5)
+
+// Subtraction binds stronger than comparison.
+#test(3 == 5 - 2, true)
+
+// Boolean operations bind stronger than '=='.
+#test("a" == "a" and 2 < 3, true)
+#test(not "b" == "b", false)
+
+// Assignment binds stronger than boolean operations.
+// Error: 2-7 cannot assign to this expression
+{not x = "a"}
+
+---
+// Parentheses override precedence.
+#test((1), 1)
+#test((1+2)*-3, -9)
+
+// Error: 14 expected closing paren
+#test({(1 + 1}, 2)
+
+---
+// Precedence doesn't matter for chained unary operators.
+// Error: 2-11 cannot apply '-' to boolean
+{-not true}