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 0f1bbd083946..12f00d1bbb6b 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
@@ -559,15 +559,8 @@ function checkUpdateFinished() {
   do_check_false(log.exists());
 
   updatesDir.append("0");
-  if (IS_WIN) {
-    // On Windows, this log file is written to the AppData directory, and will
-    // therefore exist.
-    logTestInfo("testing " + updatesDir.path + " should exist");
-    do_check_true(updatesDir.exists());
-  } else {
-    logTestInfo("testing " + updatesDir.path + " shouldn't exist");
-    do_check_false(updatesDir.exists());
-  }
+  logTestInfo("testing " + updatesDir.path + " should exist");
+  do_check_true(updatesDir.exists());
 
   removeCallbackCopy();
 }
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 c7862ffe9186..4ab6933dc150 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
@@ -584,15 +584,8 @@ function checkUpdateFinished() {
   do_check_false(log.exists());
 
   updatesDir.append("0");
-  if (IS_WIN) {
-    // On Windows, this log file is written to the AppData directory, and will
-    // therefore exist.
-    logTestInfo("testing " + updatesDir.path + " should exist");
-    do_check_true(updatesDir.exists());
-  } else {
-    logTestInfo("testing " + updatesDir.path + " shouldn't exist");
-    do_check_false(updatesDir.exists());
-  }
+  logTestInfo("testing " + updatesDir.path + " should exist");
+  do_check_true(updatesDir.exists());
 
   removeCallbackCopy();
 }
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 df176e9a03c9..53f300cd9afb 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
@@ -536,15 +536,8 @@ function checkUpdateFinished() {
   do_check_false(log.exists());
 
   updatesDir.append("0");
-  if (IS_WIN) {
-    // On Windows, this log file is written to the AppData directory, and will
-    // therefore exist.
-    logTestInfo("testing " + updatesDir.path + " should exist");
-    do_check_true(updatesDir.exists());
-  } else {
-    logTestInfo("testing " + updatesDir.path + " shouldn't exist");
-    do_check_false(updatesDir.exists());
-  }
+  logTestInfo("testing " + updatesDir.path + " should exist");
+  do_check_true(updatesDir.exists());
 
   removeCallbackCopy();
 }
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 c4547269ecbc..1a51beb8c01c 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
@@ -565,15 +565,8 @@ function checkUpdateFinished() {
   do_check_false(log.exists());
 
   updatesDir.append("0");
-  if (IS_WIN) {
-    // On Windows, this log file is written to the AppData directory, and will
-    // therefore exist.
-    logTestInfo("testing " + updatesDir.path + " should exist");
-    do_check_true(updatesDir.exists());
-  } else {
-    logTestInfo("testing " + updatesDir.path + " shouldn't exist");
-    do_check_false(updatesDir.exists());
-  }
+  logTestInfo("testing " + updatesDir.path + " should exist");
+  do_check_true(updatesDir.exists());
 
   removeCallbackCopy();
 }