Add note to TEST.md about kubectl version.
@@ -62,6 +62,7 @@ functionality via a series of end-to-end tests.
The integration test suite operates on your currently configured Kubernetes
cluster. Prior to running the test suite, verify that:
+- `kubectl version` reports that the client is version 1.11.1 or later.
- The Linkerd docker images you're trying to test have been built and are
accessible to the Kubernetes cluster to which you are deploying
- The `kubectl` CLI has been configured to talk to that Kubernetes cluster
