diff --git a/examples/smoketest/cleararea.js b/examples/smoketest/cleararea.js
index fbba51a..eedff2a 100644
--- a/examples/smoketest/cleararea.js
+++ b/examples/smoketest/cleararea.js
@@ -6,13 +6,10 @@ x11.createClient(function(err, display) {
     var w = new Window(X, 0, 0, 700, 500);
     w.map();
 
-    var render = function() {
-      //X.ChangeGC(w.gc.id, { foreground: w.black, background: w.white });
+    w.on('expose', function() {
       var gc = X.AllocID();
       X.CreateGC(gc, w.id, { foreground: w.black, background: w.white });
       X.PolyFillRectangle(w.id, gc, [50, 50, 600, 400]);
       X.ClearArea(w.id, 0, 0, 300, 300, 0);
-    }
-
-    setTimeout(render, 100); // sometimes doesn't render without a delay
+    });
 });