diff --git a/tests/testdatechooser.c b/tests/testdatechooser.c
index 732a877160..3588381854 100644
--- a/tests/testdatechooser.c
+++ b/tests/testdatechooser.c
@@ -14,6 +14,37 @@ date_changed (GObject *calendar,
   g_free (text);
 }
 
+static GtkDateChooserDayOptions
+get_day_options (GtkDateChooserWidget *calendar,
+                 GDateTime            *date,
+                 gpointer              data)
+{
+  GtkDateChooserDayOptions options;
+
+  options = GTK_DATE_CHOOSER_DAY_NONE;
+
+  if (g_date_time_get_day_of_week (date) == 6 ||
+      g_date_time_get_day_of_week (date) == 7)
+    options |= GTK_DATE_CHOOSER_DAY_WEEKEND;
+
+  /* 4th of July */
+  if (g_date_time_get_month (date) == 7 &&
+      g_date_time_get_day_of_month (date) == 4)
+    options |= GTK_DATE_CHOOSER_DAY_HOLIDAY;
+
+  /* Bastille day */
+  if (g_date_time_get_month (date) == 7 &&
+      g_date_time_get_day_of_month (date) == 14)
+    options |= GTK_DATE_CHOOSER_DAY_HOLIDAY;
+
+  /* my birthday */
+  if (g_date_time_get_month (date) == 3 &&
+      g_date_time_get_day_of_month (date) == 1)
+    options |= GTK_DATE_CHOOSER_DAY_MARKED;
+
+  return options;
+}
+
 int
 main (int argc, char *argv[])
 {
@@ -26,6 +57,10 @@ main (int argc, char *argv[])
   calendar = gtk_date_chooser_widget_new ();
   g_signal_connect (calendar, "notify::date",
                     G_CALLBACK (date_changed), NULL);
+  gtk_date_chooser_widget_set_day_options_callback (GTK_DATE_CHOOSER_WIDGET (calendar),
+                                                    get_day_options,
+                                                    NULL,
+                                                    NULL);
 
   gtk_container_add (GTK_CONTAINER (window), calendar);