--- a/services/sync/tests/tps/all_tests.json
+++ b/services/sync/tests/tps/all_tests.json
@@ -16,17 +16,16 @@
     "test_bug575423.js",
     "test_bug546807.js",
     "test_history_collision.js",
     "test_privbrw_passwords.js",
     "test_privbrw_tabs.js",
     "test_bookmarks_in_same_named_folder.js",
     "test_client_wipe.js",
     "test_special_tabs.js",
-    "test_addon_sanity.js",
     "test_addon_restartless_xpi.js",
     "test_addon_nonrestartless_xpi.js",
     "test_addon_reconciling.js",
     "test_addon_wipe.js",
     "test_existing_bookmarks.js"
   ]
 }
 

--- a/services/sync/tests/tps/test_addon_nonrestartless_xpi.js
+++ b/services/sync/tests/tps/test_addon_nonrestartless_xpi.js
@@ -25,29 +25,33 @@ var phases = {
   "phase16": "profile2"
 };
 
 const id = "unsigned-xpi@tests.mozilla.org";
 
 Phase("phase01", [
   [Addons.verifyNot, [id]],
   [Addons.install, [id]],
-  [Sync]
+  [Sync],
+  [Addons.skipValidation] // Validation disabled due to bug 1427835
 ]);
 Phase("phase02", [
   [Addons.verify, [id], STATE_ENABLED],
-  [Sync]
+  [Sync],
+  [Addons.skipValidation] // Validation disabled due to bug 1427835
 ]);
 Phase("phase03", [
   [Addons.verifyNot, [id]],
-  [Sync]
+  [Sync],
+  [Addons.skipValidation] // Validation disabled due to bug 1427835
 ]);
 Phase("phase04", [
   [Addons.verify, [id], STATE_ENABLED],
-  [Sync]
+  [Sync],
+  [Addons.skipValidation] // Validation disabled due to bug 1427835
 ]);
 
 // Now we disable the add-on
 Phase("phase05", [
   [EnsureTracking],
   [Addons.setEnabled, [id], STATE_DISABLED],
   [Sync],
   [Addons.skipValidation] // Validation disabled due to bug 1380472
@@ -67,43 +71,51 @@ Phase("phase08", [
   [Sync],
   [Addons.skipValidation] // Validation disabled due to bug 1380472
 ]);
 
 // Now we re-enable it again.
 Phase("phase09", [
   [EnsureTracking],
   [Addons.setEnabled, [id], STATE_ENABLED],
-  [Sync]
+  [Sync],
+  [Addons.skipValidation] // Validation disabled due to bug 1427835
 ]);
 Phase("phase10", [
   [Addons.verify, [id], STATE_ENABLED],
-  [Sync]
+  [Sync],
+  [Addons.skipValidation] // Validation disabled due to bug 1427835
 ]);
 Phase("phase11", [
   [Addons.verify, [id], STATE_DISABLED],
-  [Sync]
+  [Sync],
+  [Addons.skipValidation] // Validation disabled due to bug 1427835
 ]);
 Phase("phase12", [
   [Addons.verify, [id], STATE_ENABLED],
-  [Sync]
+  [Sync],
+  [Addons.skipValidation] // Validation disabled due to bug 1427835
 ]);
 
 // And we uninstall it
 
 Phase("phase13", [
   [EnsureTracking],
   [Addons.verify, [id], STATE_ENABLED],
   [Addons.uninstall, [id]],
-  [Sync]
+  [Sync],
+  [Addons.skipValidation] // Validation disabled due to bug 1427835
 ]);
 Phase("phase14", [
   [Addons.verifyNot, [id]],
-  [Sync]
+  [Sync],
+  [Addons.skipValidation] // Validation disabled due to bug 1427835
 ]);
 Phase("phase15", [
   [Addons.verify, [id], STATE_ENABLED],
-  [Sync]
+  [Sync],
+  [Addons.skipValidation] // Validation disabled due to bug 1427835
 ]);
 Phase("phase16", [
   [Addons.verifyNot, [id]],
-  [Sync]
+  [Sync],
+  [Addons.skipValidation] // Validation disabled due to bug 1427835
 ]);

deleted file mode 100644
--- a/services/sync/tests/tps/test_addon_sanity.js
+++ /dev/null
@@ -1,30 +0,0 @@
-/* Any copyright is dedicated to the Public Domain.
-   http://creativecommons.org/publicdomain/zero/1.0/ */
-
-/*
- * The list of phases mapped to their corresponding profiles.  The object
- * here must be in strict JSON format, as it will get parsed by the Python
- * testrunner (no single quotes, extra comma's, etc).
- */
-
-EnableEngines(["addons"]);
-
-var phases = { "phase1": "profile1",
-               "phase2": "profile1" };
-
-const id = "unsigned-xpi@tests.mozilla.org";
-
-Phase("phase1", [
-  [Addons.install, [id]],
-  // Non-restartless add-on shouldn't be found after install.
-  [Addons.verifyNot, [id]],
-
-  // But it should be marked for Sync.
-  [Sync]
-]);
-
-Phase("phase2", [
-  // Add-on should be present after restart
-  [Addons.verify, [id], STATE_ENABLED],
-  [Sync] // Sync to ensure everything is initialized enough for the addon validator to run
-]);