diff --git a/src/tests/xpra/test_apps/fps.py b/src/tests/xpra/test_apps/fps.py
new file mode 100755
index 0000000000..c44d587009
--- /dev/null
+++ b/src/tests/xpra/test_apps/fps.py
@@ -0,0 +1,62 @@
+#!/usr/bin/env python
+
+import cairo
+from gi.repository import Gtk, Gdk, GLib   #@UnresolvedImport
+
+class TransparentColorWindow(Gtk.Window):
+
+    def __init__(self):
+        super(TransparentColorWindow, self).__init__()
+        self.set_position(Gtk.WindowPosition.CENTER)
+        self.set_default_size(640, 640)
+        self.set_app_paintable(True)
+        self.set_events(Gdk.EventMask.KEY_PRESS_MASK)
+        self.connect("key_press_event", self.on_key_press)
+        self.counter = 0
+        self.connect("draw", self.draw)
+        self.connect("destroy", Gtk.main_quit)
+        GLib.timeout_add(10, self.repaint)
+
+
+    def on_key_press(self, *args):
+        pass
+
+    def repaint(self):
+        self.counter += 1
+        self.queue_draw()
+        return True
+
+    def draw(self, widget, cr):
+        cr.set_operator(cairo.OPERATOR_SOURCE)
+        w, h = widget.get_size()
+        c = 0.2
+        def paint_block(x, y, w, h, c, label=""):
+            R = G = B = c
+            cr.set_operator(cairo.OPERATOR_SOURCE)
+            cr.set_source_rgb(R, G, B)
+            cr.rectangle(x, y, w, h)
+            cr.fill()
+            if label:
+                cr.set_source_rgb(1, 1, 1)
+                cr.move_to(x+w/2-12, y+h/2+8)
+                cr.show_text(label)
+
+        #always paint top-left block in red or black
+        div2 = self.counter%2==0
+        div4 = self.counter%4==0
+        div8 = self.counter%8==0
+        div16 = self.counter%16==0
+        paint_block(0, 0, w//2, h//2, div2*c, "1")
+        if div2:        #half-rate
+            #paint top-right block in green or black
+            paint_block(w//2, 0, w//2, h//2, div4*c, "1/2")
+        if div4:        #quarter rate
+            #paint bottom-left block in blue or black 
+            paint_block(0, h//2, w//2, h//2, div8*c, "1/4")
+        if div8:        #one-eigth rate
+            #paint bottom-right block in white or black
+            paint_block(w//2, h//2, w//2, h//2, div16*c, "1/8")
+
+w = TransparentColorWindow()
+w.show_all()
+Gtk.main()