diff --git a/testing/mozharness/configs/android/androidarm_4_3.py b/testing/mozharness/configs/android/androidarm_4_3.py
index ed722552f53..a9ad5546131 100644
--- a/testing/mozharness/configs/android/androidarm_4_3.py
+++ b/testing/mozharness/configs/android/androidarm_4_3.py
@@ -85,6 +85,62 @@ config = {
             "category": "jsreftest",
             "extra_args": ["--this-chunk=6"],
         },
+        "jsreftest-7": {
+            "category": "jsreftest",
+            "extra_args": ["--this-chunk=7"],
+        },
+        "jsreftest-8": {
+            "category": "jsreftest",
+            "extra_args": ["--this-chunk=8"],
+        },
+        "jsreftest-9": {
+            "category": "jsreftest",
+            "extra_args": ["--this-chunk=9"],
+        },
+        "jsreftest-10": {
+            "category": "jsreftest",
+            "extra_args": ["--this-chunk=10"],
+        },
+        "jsreftest-11": {
+            "category": "jsreftest",
+            "extra_args": ["--this-chunk=11"],
+        },
+        "jsreftest-12": {
+            "category": "jsreftest",
+            "extra_args": ["--this-chunk=12"],
+        },
+        "jsreftest-13": {
+            "category": "jsreftest",
+            "extra_args": ["--this-chunk=13"],
+        },
+        "jsreftest-14": {
+            "category": "jsreftest",
+            "extra_args": ["--this-chunk=14"],
+        },
+        "jsreftest-15": {
+            "category": "jsreftest",
+            "extra_args": ["--this-chunk=15"],
+        },
+        "jsreftest-16": {
+            "category": "jsreftest",
+            "extra_args": ["--this-chunk=16"],
+        },
+        "jsreftest-17": {
+            "category": "jsreftest",
+            "extra_args": ["--this-chunk=17"],
+        },
+        "jsreftest-18": {
+            "category": "jsreftest",
+            "extra_args": ["--this-chunk=18"],
+        },
+        "jsreftest-19": {
+            "category": "jsreftest",
+            "extra_args": ["--this-chunk=19"],
+        },
+        "jsreftest-20": {
+            "category": "jsreftest",
+            "extra_args": ["--this-chunk=20"],
+        },
         "mochitest-1": {
             "category": "mochitest",
             "extra_args": ["--total-chunks=16", "--this-chunk=1"],
@@ -171,84 +227,244 @@ config = {
         },
         "reftest-1": {
             "category": "reftest",
-            "extra_args": ["--total-chunks=16", "--this-chunk=1",
+            "extra_args": ["--total-chunks=48", "--this-chunk=1",
                 "tests/layout/reftests/reftest.list"]
         },
         "reftest-2": {
             "category": "reftest",
-            "extra_args": ["--total-chunks=16", "--this-chunk=2",
+            "extra_args": ["--total-chunks=48", "--this-chunk=2",
                 "tests/layout/reftests/reftest.list"]
         },
         "reftest-3": {
             "category": "reftest",
-            "extra_args": ["--total-chunks=16", "--this-chunk=3",
+            "extra_args": ["--total-chunks=48", "--this-chunk=3",
                 "tests/layout/reftests/reftest.list"]
         },
         "reftest-4": {
             "category": "reftest",
-            "extra_args": ["--total-chunks=16", "--this-chunk=4",
+            "extra_args": ["--total-chunks=48", "--this-chunk=4",
                 "tests/layout/reftests/reftest.list"]
         },
         "reftest-5": {
             "category": "reftest",
-            "extra_args": ["--total-chunks=16", "--this-chunk=5",
+            "extra_args": ["--total-chunks=48", "--this-chunk=5",
                 "tests/layout/reftests/reftest.list"]
         },
         "reftest-6": {
             "category": "reftest",
-            "extra_args": ["--total-chunks=16", "--this-chunk=6",
+            "extra_args": ["--total-chunks=48", "--this-chunk=6",
                 "tests/layout/reftests/reftest.list"]
         },
         "reftest-7": {
             "category": "reftest",
-            "extra_args": ["--total-chunks=16", "--this-chunk=7",
+            "extra_args": ["--total-chunks=48", "--this-chunk=7",
                 "tests/layout/reftests/reftest.list"]
         },
         "reftest-8": {
             "category": "reftest",
-            "extra_args": ["--total-chunks=16", "--this-chunk=8",
+            "extra_args": ["--total-chunks=48", "--this-chunk=8",
                 "tests/layout/reftests/reftest.list"]
         },
         "reftest-9": {
             "category": "reftest",
-            "extra_args": ["--total-chunks=16", "--this-chunk=9",
+            "extra_args": ["--total-chunks=48", "--this-chunk=9",
                 "tests/layout/reftests/reftest.list"]
         },
         "reftest-10": {
             "category": "reftest",
-            "extra_args": ["--total-chunks=16", "--this-chunk=10",
+            "extra_args": ["--total-chunks=48", "--this-chunk=10",
                 "tests/layout/reftests/reftest.list"]
         },
         "reftest-11": {
             "category": "reftest",
-            "extra_args": ["--total-chunks=16", "--this-chunk=11",
+            "extra_args": ["--total-chunks=48", "--this-chunk=11",
                 "tests/layout/reftests/reftest.list"]
         },
         "reftest-12": {
             "category": "reftest",
-            "extra_args": ["--total-chunks=16", "--this-chunk=12",
+            "extra_args": ["--total-chunks=48", "--this-chunk=12",
                 "tests/layout/reftests/reftest.list"]
         },
         "reftest-13": {
             "category": "reftest",
-            "extra_args": ["--total-chunks=16", "--this-chunk=13",
+            "extra_args": ["--total-chunks=48", "--this-chunk=13",
                 "tests/layout/reftests/reftest.list"]
         },
         "reftest-14": {
             "category": "reftest",
-            "extra_args": ["--total-chunks=16", "--this-chunk=14",
+            "extra_args": ["--total-chunks=48", "--this-chunk=14",
                 "tests/layout/reftests/reftest.list"]
         },
         "reftest-15": {
             "category": "reftest",
-            "extra_args": ["--total-chunks=16", "--this-chunk=15",
+            "extra_args": ["--total-chunks=48", "--this-chunk=15",
                 "tests/layout/reftests/reftest.list"]
         },
         "reftest-16": {
             "category": "reftest",
-            "extra_args": ["--total-chunks=16", "--this-chunk=16",
+            "extra_args": ["--total-chunks=48", "--this-chunk=16",
                 "tests/layout/reftests/reftest.list"]
         },
+        "reftest-17": {
+            "category": "reftest",
+            "extra args": ["--total-chunks=48", "--this-chunk=17",
+            "tests/layout/reftests/reftest.list"]
+        },
+       "reftest-18": {
+            "category": "reftest",
+            "extra args": ["--total-chunks=48", "--this-chunk=18",
+            "tests/layout/reftests/reftest.list"]
+        },
+        "reftest-19": {
+            "category": "reftest",
+            "extra args": ["--total-chunks=48", "--this-chunk=19",
+            "tests/layout/reftests/reftest.list"]
+        },
+        "reftest-20": {
+            "category": "reftest",
+            "extra args": ["--total-chunks=48", "--this-chunk=20",
+            "tests/layout/reftests/reftest.list"]
+        },
+        "reftest-21": {
+            "category": "reftest",
+            "extra args": ["--total-chunks=48", "--this-chunk=21",
+            "tests/layout/reftests/reftest.list"]
+        },
+        "reftest-22": {
+            "category": "reftest",
+            "extra args": ["--total-chunks=48", "--this-chunk=22",
+            "tests/layout/reftests/reftest.list"]
+        },
+        "reftest-23": {
+            "category": "reftest",
+            "extra args": ["--total-chunks=48", "--this-chunk=23",
+            "tests/layout/reftests/reftest.list"]
+        },
+        "reftest-24": {
+            "category": "reftest",
+            "extra args": ["--total-chunks=48", "--this-chunk=24",
+            "tests/layout/reftests/reftest.list"]
+        },
+        "reftest-25": {
+            "category": "reftest",
+            "extra args": ["--total-chunks=48", "--this-chunk=25",
+            "tests/layout/reftests/reftest.list"]
+        },
+        "reftest-26": {
+            "category": "reftest",
+            "extra args": ["--total-chunks=48", "--this-chunk=26",
+            "tests/layout/reftests/reftest.list"]
+        },
+        "reftest-27": {
+            "category": "reftest",
+            "extra args": ["--total-chunks=48", "--this-chunk=27",
+            "tests/layout/reftests/reftest.list"]
+        },
+        "reftest-28": {
+            "category": "reftest",
+            "extra args": ["--total-chunks=48", "--this-chunk=28",
+            "tests/layout/reftests/reftest.list"]
+        },
+        "reftest-29": {
+            "category": "reftest",
+            "extra args": ["--total-chunks=48", "--this-chunk=29",
+            "tests/layout/reftests/reftest.list"]
+        },
+        "reftest-30": {
+            "category": "reftest",
+            "extra args": ["--total-chunks=48", "--this-chunk=30",
+            "tests/layout/reftests/reftest.list"]
+        },
+        "reftest-31": {
+            "category": "reftest",
+            "extra args": ["--total-chunks=48", "--this-chunk=31",
+            "tests/layout/reftests/reftest.list"]
+        },
+        "reftest-32": {
+            "category": "reftest",
+            "extra args": ["--total-chunks=48", "--this-chunk=32",
+            "tests/layout/reftests/reftest.list"]
+        },
+        "reftest-33": {
+            "category": "reftest",
+            "extra args": ["--total-chunks=48", "--this-chunk=33",
+            "tests/layout/reftests/reftest.list"]
+        },
+        "reftest-34": {
+            "category": "reftest",
+            "extra args": ["--total-chunks=48", "--this-chunk=34",
+            "tests/layout/reftests/reftest.list"]
+        },
+        "reftest-35": {
+            "category": "reftest",
+            "extra args": ["--total-chunks=48", "--this-chunk=35",
+            "tests/layout/reftests/reftest.list"]
+        },
+        "reftest-36": {
+            "category": "reftest",
+            "extra args": ["--total-chunks=48", "--this-chunk=36",
+            "tests/layout/reftests/reftest.list"]
+        },
+        "reftest-37": {
+            "category": "reftest",
+            "extra args": ["--total-chunks=48", "--this-chunk=37",
+            "tests/layout/reftests/reftest.list"]
+        },
+        "reftest-38": {
+            "category": "reftest",
+            "extra args": ["--total-chunks=48", "--this-chunk=38",
+            "tests/layout/reftests/reftest.list"]
+        },
+        "reftest-39": {
+            "category": "reftest",
+            "extra args": ["--total-chunks=48", "--this-chunk=39",
+            "tests/layout/reftests/reftest.list"]
+        },
+        "reftest-40": {
+            "category": "reftest",
+            "extra args": ["--total-chunks=48", "--this-chunk=40",
+            "tests/layout/reftests/reftest.list"]
+        },
+        "reftest-41": {
+            "category": "reftest",
+            "extra args": ["--total-chunks=48", "--this-chunk=41",
+            "tests/layout/reftests/reftest.list"]
+        },
+        "reftest-42": {
+            "category": "reftest",
+            "extra args": ["--total-chunks=48", "--this-chunk=42",
+            "tests/layout/reftests/reftest.list"]
+        },
+        "reftest-43": {
+            "category": "reftest",
+            "extra args": ["--total-chunks=48", "--this-chunk=43",
+            "tests/layout/reftests/reftest.list"]
+        },
+        "reftest-44": {
+            "category": "reftest",
+            "extra args": ["--total-chunks=48", "--this-chunk=44",
+            "tests/layout/reftests/reftest.list"]
+        },
+        "reftest-45": {
+            "category": "reftest",
+            "extra args": ["--total-chunks=48", "--this-chunk=45",
+            "tests/layout/reftests/reftest.list"]
+        },
+        "reftest-46": {
+            "category": "reftest",
+            "extra args": ["--total-chunks=48", "--this-chunk=46",
+            "tests/layout/reftests/reftest.list"]
+        },
+        "reftest-47": {
+            "category": "reftest",
+            "extra args": ["--total-chunks=48", "--this-chunk=47",
+            "tests/layout/reftests/reftest.list"]
+        },
+        "reftest-48": {
+            "category": "reftest",
+            "extra args": ["--total-chunks=48", "--this-chunk=48",
+            "tests/layout/reftests/reftest.list"]
+        },
         "crashtest-1": {
             "category": "crashtest",
             "extra_args": ["--this-chunk=1"],
@@ -257,6 +473,14 @@ config = {
             "category": "crashtest",
             "extra_args": ["--this-chunk=2"],
         },
+        "crashtest-3": {
+            "category": "crashtest",
+            "extra_args": ["--this-chunk=3"],
+        },
+        "crashtest-4": {
+            "category": "crashtest",
+            "extra_args": ["--this-chunk=4"],
+        },
         "xpcshell-1": {
             "category": "xpcshell",
             "extra_args": ["--total-chunks=3", "--this-chunk=1"],