diff --git a/test-suite/tests/srfi-13.test b/test-suite/tests/srfi-13.test
index b55472b75..4b64bbfe1 100644
--- a/test-suite/tests/srfi-13.test
+++ b/test-suite/tests/srfi-13.test
@@ -2,23 +2,23 @@
 ;;;; Martin Grabmueller, 2001-05-07
 ;;;;
 ;;;; Copyright (C) 2001 Free Software Foundation, Inc.
-;;;; 
+;;;;
 ;;;; This program is free software; you can redistribute it and/or modify
 ;;;; it under the terms of the GNU General Public License as published by
 ;;;; the Free Software Foundation; either version 2, or (at your option)
 ;;;; any later version.
-;;;; 
+;;;;
 ;;;; This program is distributed in the hope that it will be useful,
 ;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
 ;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 ;;;; GNU General Public License for more details.
-;;;; 
+;;;;
 ;;;; You should have received a copy of the GNU General Public License
 ;;;; along with this software; see the file COPYING.  If not, write to
 ;;;; the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
 ;;;; Boston, MA 02111-1307 USA
 
-(use-modules (srfi srfi-13) (srfi srfi-14))
+(use-modules (srfi srfi-13) (srfi srfi-14) (test-suite lib))
 
 ;;; This kludge is needed, because SRFI-13 redefines some bindings in
 ;;; the core.
@@ -161,7 +161,7 @@
      (string=? "bla|delim|fasel" (string-join '("bla" "fasel") "|delim|"
 					      'infix)))
 
-  (pass-if-exception "empty list, strict infix" 
+  (pass-if-exception "empty list, strict infix"
      exception:strict-infix-grammar
      (string-join '() "|delim|" 'strict-infix))
 
@@ -1010,3 +1010,14 @@
 
   (pass-if "pred, start and end index"
     (string=? "" (string-delete ".foo.bar." char-alphabetic? 2 4))))
+
+(with-test-prefix "string-map"
+
+  (pass-if "constant"
+    (string=? "xxx" (string-map (lambda (c) #\x) "foo")))
+
+  (pass-if "identity"
+    (string=? "foo" (string-map identity "foo")))
+
+  (pass-if "upcase"
+    (string=? "FOO" (string-map char-upcase "foo"))))