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diff --git a/gnulib b/gnulib
deleted file mode 160000
-Subproject 443bc5ffcf7429e557f4a371b0661abe98ddbc1
diff --git a/gnulib/tests/unicase/test-u8-is-lowercase.c b/gnulib/tests/unicase/test-u8-is-lowercase.c
new file mode 100644
index 0000000..74774a7
--- /dev/null
+++ b/gnulib/tests/unicase/test-u8-is-lowercase.c
@@ -0,0 +1,78 @@
+/* Test of test whether an UTF-8 string is entirely lower case.
+   Copyright (C) 2009-2011 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 3 of the License, 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 program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+/* Written by Bruno Haible <bruno@clisp.org>, 2009.  */
+
+#include <config.h>
+
+#include "unicase.h"
+
+#include "unistr.h"
+#include "macros.h"
+
+#define UNIT uint8_t
+#include "test-is-lowercase.h"
+#undef UNIT
+
+static void
+test_nonascii (int (*my_is) (const uint8_t *, size_t, const char *, bool *))
+{
+  /* Test cases from Unicode 5.1.0.  */
+  {
+    static const uint8_t input[] = { 0xE2, 0x93, 0x97 };
+    bool result;
+
+    ASSERT (my_is (input, SIZEOF (input), NULL, &result) == 0);
+    ASSERT (result == true);
+  }
+  {
+    static const uint8_t input[] = { 0xE2, 0x92, 0xBD };
+    bool result;
+
+    ASSERT (my_is (input, SIZEOF (input), NULL, &result) == 0);
+    ASSERT (result == false);
+  }
+  {
+    static const uint8_t input[] = { 0xCA, 0xB0 };
+    bool result;
+
+    ASSERT (my_is (input, SIZEOF (input), NULL, &result) == 0);
+    ASSERT (result == true);
+  }
+  {
+    static const uint8_t input[] = { 0xE1, 0x80, 0xB4 };
+    bool result;
+
+    ASSERT (my_is (input, SIZEOF (input), NULL, &result) == 0);
+    ASSERT (result == true);
+  }
+  {
+    static const uint8_t input[] = { 0xCA, 0xBD };
+    bool result;
+
+    ASSERT (my_is (input, SIZEOF (input), NULL, &result) == 0);
+    ASSERT (result == true);
+  }
+}
+
+int
+main ()
+{
+  test_ascii (u8_is_lowercase);
+  test_nonascii (u8_is_lowercase);
+
+  return 0;
+}