diff --git a/gtk/tests/accessible.c b/gtk/tests/accessible.c
index 2805a2eab6..b44cb140a7 100644
--- a/gtk/tests/accessible.c
+++ b/gtk/tests/accessible.c
@@ -33,4 +33,6 @@ main (int argc, char *argv[])
 
   for (i = 0; tp[i]; i++)
     test_type (tp[i]);
+
+  return 0;
 }
diff --git a/tests/testgeometry.c b/tests/testgeometry.c
index c3c4fbe4f7..0e0fff1173 100644
--- a/tests/testgeometry.c
+++ b/tests/testgeometry.c
@@ -219,4 +219,6 @@ main(int argc, char **argv)
   create_window (GDK_HINT_RESIZE_INC | GDK_HINT_BASE_SIZE | GDK_HINT_MIN_SIZE);
 
   gtk_main ();
+
+  return 0;
 }
diff --git a/tests/testtoplevelembed.c b/tests/testtoplevelembed.c
index e183d94f3e..997d05063d 100644
--- a/tests/testtoplevelembed.c
+++ b/tests/testtoplevelembed.c
@@ -100,4 +100,6 @@ main (gint argc, gchar **argv)
 
   gtk_widget_show_all (window);
   gtk_main ();
+
+  return 0;
 }