diff --git a/services/sync/tests/unit/head_first.js b/services/sync/tests/unit/head_first.js
index ac1d1543c1d3..e928d8d0a98f 100644
--- a/services/sync/tests/unit/head_first.js
+++ b/services/sync/tests/unit/head_first.js
@@ -3,6 +3,7 @@ version(180);
 const Cc = Components.classes;
 const Ci = Components.interfaces;
 const Cr = Components.results;
+const Cu = Components.utils;
 
 let ds = Cc["@mozilla.org/file/directory_service;1"]
   .getService(Ci.nsIProperties);
diff --git a/services/sync/tests/unit/test_async.js b/services/sync/tests/unit/test_async.js
index 36795e9948a4..ed742d25abeb 100644
--- a/services/sync/tests/unit/test_async.js
+++ b/services/sync/tests/unit/test_async.js
@@ -1,5 +1,3 @@
-const Cu = Components.utils;
-
 Cu.import("resource://weave/util.js");
 Cu.import("resource://weave/async.js");
 
diff --git a/services/sync/tests/unit/test_async_exceptions.js b/services/sync/tests/unit/test_async_exceptions.js
index f1fe78eadb28..c9d071113615 100644
--- a/services/sync/tests/unit/test_async_exceptions.js
+++ b/services/sync/tests/unit/test_async_exceptions.js
@@ -1,5 +1,3 @@
-const Cu = Components.utils;
-
 Cu.import("resource://weave/util.js");
 Cu.import("resource://weave/async.js");
 
diff --git a/services/sync/tests/unit/test_async_missing_yield.js b/services/sync/tests/unit/test_async_missing_yield.js
index 14347ae518b9..840e7ce782ab 100644
--- a/services/sync/tests/unit/test_async_missing_yield.js
+++ b/services/sync/tests/unit/test_async_missing_yield.js
@@ -1,5 +1,3 @@
-const Cu = Components.utils;
-
 Cu.import("resource://weave/util.js");
 Cu.import("resource://weave/async.js");
 
diff --git a/services/sync/tests/unit/test_sharing.js b/services/sync/tests/unit/test_sharing.js
index b962404e9d37..e18f6de3be95 100644
--- a/services/sync/tests/unit/test_sharing.js
+++ b/services/sync/tests/unit/test_sharing.js
@@ -1,5 +1,3 @@
-const Cu = Components.utils;
-
 Cu.import("resource://weave/sharing.js");
 Cu.import("resource://weave/util.js");
 
diff --git a/services/sync/tests/unit/test_xmpp.js b/services/sync/tests/unit/test_xmpp.js
index 60396b2e054c..9c76eed9308a 100644
--- a/services/sync/tests/unit/test_xmpp.js
+++ b/services/sync/tests/unit/test_xmpp.js
@@ -1,5 +1,3 @@
-var Cu = Components.utils;
-
 Cu.import( "resource://weave/xmpp/xmppClient.js" );
 
 function LOG(aMsg) {