diff --git a/extension.js b/extension.js
index 8d515a6..2cd97c2 100644
--- a/extension.js
+++ b/extension.js
@@ -614,10 +614,10 @@ export default class BurnMyWindows extends Extension {
       }
     });
 
-    // To make things deterministic during testing, we set the effect duration to 5
+    // To make things deterministic during testing, we set the effect duration to 8
     // seconds.
     const duration = testMode ?
-      5000 :
+      8000 :
       profile.settings.get_int(effect.constructor.getNick() + '-animation-time');
 
     // Finally start the animation!
diff --git a/tests/run-test.sh b/tests/run-test.sh
index e751dfb..7709746 100755
--- a/tests/run-test.sh
+++ b/tests/run-test.sh
@@ -140,10 +140,10 @@ test_effect() {
 
   sleep 1
   do_in_pod gnome-terminal
-  sleep 3
+  sleep 4
   find_target "${1}-open-${SESSION}-${FEDORA_VERSION}.png" "Failed to test ${1} window open effect!"
   send_keystroke "Alt+F4"
-  sleep 3
+  sleep 4
   find_target "${1}-close-${SESSION}-${FEDORA_VERSION}.png" "Failed to test ${1} window close effect!"
 }