diff --git a/testing/mozharness/mozharness.json b/testing/mozharness/mozharness.json
index ab8b5fde28a..ea17e11d20f 100644
--- a/testing/mozharness/mozharness.json
+++ b/testing/mozharness/mozharness.json
@@ -1,4 +1,4 @@
 {
     "repo": "https://hg.mozilla.org/build/mozharness",
-    "revision": "8978f498da2b"
+    "revision": "672af8a8da3e"
 }
diff --git a/testing/taskcluster/tasks/tests/b2g_gaia_js_integration_tests.yml b/testing/taskcluster/tasks/tests/b2g_gaia_js_integration_tests.yml
index 8744b765e0d..c35fb1a325e 100644
--- a/testing/taskcluster/tasks/tests/b2g_gaia_js_integration_tests.yml
+++ b/testing/taskcluster/tasks/tests/b2g_gaia_js_integration_tests.yml
@@ -33,7 +33,7 @@ task:
 
   extra:
     chunks:
-      total: 20
+      total: 40
     treeherderEnv:
       - production
       - staging
diff --git a/testing/taskcluster/tasks/tests/mulet_gaia_js_integration_tests.yml b/testing/taskcluster/tasks/tests/mulet_gaia_js_integration_tests.yml
index a7a880137b8..70c6261b985 100644
--- a/testing/taskcluster/tasks/tests/mulet_gaia_js_integration_tests.yml
+++ b/testing/taskcluster/tasks/tests/mulet_gaia_js_integration_tests.yml
@@ -33,7 +33,7 @@ task:
 
   extra:
     chunks:
-      total: 20
+      total: 40
     treeherderEnv:
       - production
       - staging