diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index 64e938992..5455da360 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -34,6 +34,7 @@ jobs:
     dependsOn: "Validate"
     strategy:
       matrix:
+        # We're only running one platform per Python version to speed up builds
         Python36Linux:
           imageName: "ubuntu-16.04"
           python.version: "3.6"