diff --git a/toolkit/mozapps/update/test/unit/test_0200_app_launch_apply_update.js b/toolkit/mozapps/update/test/unit/test_0200_app_launch_apply_update.js
index 657eb9242fdd..5545f7563d6b 100644
--- a/toolkit/mozapps/update/test/unit/test_0200_app_launch_apply_update.js
+++ b/toolkit/mozapps/update/test/unit/test_0200_app_launch_apply_update.js
@@ -23,7 +23,7 @@ const MAX_TIMEOUT_RUNS = 300;
 
 // Maximum number of milliseconds the process that is launched can run before
 // the test will try to kill it.
-const APP_TIMER_TIMEOUT = 20000;
+const APP_TIMER_TIMEOUT = 120000;
 
 let gAppTimer;
 let gProcess;
diff --git a/toolkit/mozapps/update/test/unit/test_0201_app_launch_apply_update.js b/toolkit/mozapps/update/test/unit/test_0201_app_launch_apply_update.js
index f591c8872000..e8b3db8716fb 100644
--- a/toolkit/mozapps/update/test/unit/test_0201_app_launch_apply_update.js
+++ b/toolkit/mozapps/update/test/unit/test_0201_app_launch_apply_update.js
@@ -26,7 +26,7 @@ const MAX_TIMEOUT_RUNS = 300;
 
 // Maximum number of milliseconds the process that is launched can run before
 // the test will try to kill it.
-const APP_TIMER_TIMEOUT = 20000;
+const APP_TIMER_TIMEOUT = 120000;
 
 let gAppTimer;
 let gProcess;
diff --git a/toolkit/mozapps/update/test/unit/test_0203_app_launch_apply_update.js b/toolkit/mozapps/update/test/unit/test_0203_app_launch_apply_update.js
index 1d2665a582e9..d2424af2cf64 100644
--- a/toolkit/mozapps/update/test/unit/test_0203_app_launch_apply_update.js
+++ b/toolkit/mozapps/update/test/unit/test_0203_app_launch_apply_update.js
@@ -32,7 +32,7 @@ const MAX_TIMEOUT_RUNS = 300;
 
 // Maximum number of milliseconds the process that is launched can run before
 // the test will try to kill it.
-const APP_TIMER_TIMEOUT = 20000;
+const APP_TIMER_TIMEOUT = 120000;
 
 Components.utils.import("resource://gre/modules/ctypes.jsm");
 
diff --git a/toolkit/mozapps/update/test_svc/unit/test_0201_app_launch_apply_update_svc.js b/toolkit/mozapps/update/test_svc/unit/test_0201_app_launch_apply_update_svc.js
index 111e5404d9f3..b3ac0a8b6b24 100644
--- a/toolkit/mozapps/update/test_svc/unit/test_0201_app_launch_apply_update_svc.js
+++ b/toolkit/mozapps/update/test_svc/unit/test_0201_app_launch_apply_update_svc.js
@@ -26,7 +26,7 @@ const MAX_TIMEOUT_RUNS = 300;
 
 // Maximum number of milliseconds the process that is launched can run before
 // the test will try to kill it.
-const APP_TIMER_TIMEOUT = 20000;
+const APP_TIMER_TIMEOUT = 120000;
 
 let gAppTimer;
 let gProcess;
diff --git a/toolkit/mozapps/update/test_svc/unit/test_0203_app_launch_apply_update_svc.js b/toolkit/mozapps/update/test_svc/unit/test_0203_app_launch_apply_update_svc.js
index b628fbcfa1cb..fca5aef3d4e6 100644
--- a/toolkit/mozapps/update/test_svc/unit/test_0203_app_launch_apply_update_svc.js
+++ b/toolkit/mozapps/update/test_svc/unit/test_0203_app_launch_apply_update_svc.js
@@ -32,7 +32,7 @@ const MAX_TIMEOUT_RUNS = 300;
 
 // Maximum number of milliseconds the process that is launched can run before
 // the test will try to kill it.
-const APP_TIMER_TIMEOUT = 20000;
+const APP_TIMER_TIMEOUT = 120000;
 
 Components.utils.import("resource://gre/modules/ctypes.jsm");