--- /dev/null
+\version "2.16.0"
+
+#(ly:set-option 'warning-as-error #f)
+#(ly:expect-warning (_ "this is a warning that won't be triggered"))
+
+\header {
+ texidoc = "If a warning is expected, but not triggered, print out a
+warning about this fact. This will be used to detect missing warnings
+in our regtests."
+}
+
+\relative c' { c4 }