diff --git a/glib/tests/markup-escape.c b/glib/tests/markup-escape.c
index 2d5de854d..44290fed9 100644
--- a/glib/tests/markup-escape.c
+++ b/glib/tests/markup-escape.c
@@ -144,21 +144,21 @@ format_test (void)
 
 int main (int argc, char **argv)
 {
-  gint i;
+  gsize i;
   gchar *path;
 
   g_test_init (&argc, &argv, NULL);
 
   for (i = 0; i < G_N_ELEMENTS (escape_tests); i++)
     {
-      path = g_strdup_printf ("/markup/escape-text/%d", i);
+      path = g_strdup_printf ("/markup/escape-text/%" G_GSIZE_FORMAT, i);
       g_test_add_data_func (path, &escape_tests[i], escape_test);
       g_free (path);
     }
 
   for (i = 0; i < G_N_ELEMENTS (unichar_tests); i++)
     {
-      path = g_strdup_printf ("/markup/escape-unichar/%d", i);
+      path = g_strdup_printf ("/markup/escape-unichar/%" G_GSIZE_FORMAT, i);
       g_test_add_data_func (path, &unichar_tests[i], unichar_test);
       g_free (path);
     }