diff --git a/taskcluster/docker/visual-metrics/run-visual-metrics.py b/taskcluster/docker/visual-metrics/run-visual-metrics.py
index 698d66237..2593a0877 100755
--- a/taskcluster/docker/visual-metrics/run-visual-metrics.py
+++ b/taskcluster/docker/visual-metrics/run-visual-metrics.py
@@ -46,6 +46,9 @@ class Job:
     #: The extra options for this job.
     extra_options = attr.ib(type=str)
 
+    #: If true, we allow 0's in the vismet results
+    accept_zero_vismet = attr.ib(type=bool)
+
     #: json_path: The path to the ``browsertime.json`` file on disk.
     json_path = attr.ib(type=Path)
 
@@ -61,6 +64,7 @@ JOB_SCHEMA = Schema(
                 Required("test_name"): str,
                 Required("browsertime_json_path"): str,
                 Required("extra_options"): [str],
+                Required("accept_zero_vismet"): bool,
             }
         ],
         Required("application"): {Required("name"): str, "version": str},
@@ -185,7 +189,7 @@ def append_result(log, suites, test_name, name, result, extra_options):
             "replicates": [result],
             "lowerIsBetter": True,
             "unit": "ms",
-            "shouldAlert": SHOULD_ALERT[name],
+            "shouldAlert": SHOULD_ALERT.get(name, False),
         }
     else:
         subtests[name]["replicates"].append(result)
@@ -322,6 +326,7 @@ def main(log, args):
                         extra_options=len(job["extra_options"]) > 0
                         and job["extra_options"]
                         or jobs_json["extra_options"],
+                        accept_zero_vismet=job["accept_zero_vismet"],
                         json_path=browsertime_json_path,
                         video_path=browsertime_json_path.parent / video,
                         count=count,
@@ -420,18 +425,20 @@ def run_visual_metrics(job, visualmetrics_path, options):
         # Python 3.5 requires a str object (not 3.6+)
         res = json.loads(res.decode("utf8"))
 
-        # Ensure that none of these values are at 0 which
-        # is indicative of a failling test
-        monitored_tests = [
-            "contentfulspeedindex",
-            "lastvisualchange",
-            "perceptualspeedindex",
-            "speedindex",
-        ]
         failed_tests = []
-        for metric, val in res.items():
-            if metric.lower() in monitored_tests and val == 0:
-                failed_tests.append(metric)
+        if not job.accept_zero_vismet:
+            # Ensure that none of these values are at 0 which
+            # is indicative of a failling test
+            monitored_tests = [
+                "contentfulspeedindex",
+                "lastvisualchange",
+                "perceptualspeedindex",
+                "speedindex",
+            ]
+            for metric, val in res.items():
+                if metric.lower() in monitored_tests and val == 0:
+                    failed_tests.append(metric)
+
         if failed_tests:
             log.error(
                 "TEST-UNEXPECTED-FAIL | Some visual metrics have an erroneous value of 0."