--- /dev/null
+\version "2.14.0"
+
+\header {
+ texidoc = "Music functions accept strings as markup arguments
+when using the type predicate @code{markup?}
+"
+}
+
+testFunc =
+#(define-music-function (parser location text music) (markup? ly:music?)
+ ;; dummy function, does nothing
+ music)
+
+\relative c' {
+ \testFunc "test string"
+ c2 <c \testFunc "test string" e>
+}