diff --git a/taskcluster/docker/visual-metrics/run-visual-metrics.py b/taskcluster/docker/visual-metrics/run-visual-metrics.py
index f5b86eafa..69f1c32d1 100644
--- a/taskcluster/docker/visual-metrics/run-visual-metrics.py
+++ b/taskcluster/docker/visual-metrics/run-visual-metrics.py
@@ -9,6 +9,7 @@
 import argparse
 import json
 import os
+import statistics
 import subprocess
 import sys
 import tarfile
@@ -123,8 +124,7 @@ def compute_median(subtest):
     """
     if "replicates" not in subtest:
         return subtest
-    series = subtest["replicates"][1:]
-    subtest["value"] = float(sum(series)) / float(len(series))
+    subtest["value"] = statistics.median(subtest["replicates"])
     return subtest
 
 
@@ -254,7 +254,7 @@ def main(log, args):
             if returncode != 0:
                 log.error(
                     "Failed to run visualmetrics.py",
-                    video_location=job.video_location,
+                    video_path=job.video_path,
                     error=res,
                 )
                 failed_runs += 1