diff -upr mate-control-center/font-viewer/font-thumbnailer.c mate-control-center-test/font-viewer/font-thumbnailer.c
--- mate-control-center/font-viewer/font-thumbnailer.c	2015-08-30 14:47:43.838836593 +0200
+++ mate-control-center-test/font-viewer/font-thumbnailer.c	2015-08-30 14:43:18.289062000 +0200
@@ -176,7 +176,6 @@ main (int argc,
     gchar *contents = NULL;
     gboolean retval, default_thumbstr = TRUE;
     gint rv = 1;
-    GdkRGBA white = { 1.0, 1.0, 1.0, 1.0 };
     GdkRGBA black = { 0.0, 0.0, 0.0, 1.0 };
     cairo_surface_t *surface;
     cairo_t *cr;
@@ -264,9 +263,6 @@ main (int argc,
                                           thumb_size, thumb_size);
     cr = cairo_create (surface);
 
-    gdk_cairo_set_source_rgba (cr, &white);
-    cairo_paint (cr);
-
     font = cairo_ft_font_face_create_for_ft_face (face, 0);
     cairo_set_font_face (cr, font);
     cairo_font_face_destroy (font);