diff --git a/test/presubmit-tests.sh b/test/presubmit-tests.sh
index 884a0f9ba..0ab1ffe86 100755
--- a/test/presubmit-tests.sh
+++ b/test/presubmit-tests.sh
@@ -31,7 +31,6 @@
 # in the Kubernetes cluster, and all the tests will run against Knative
 # Serving / Eventing of this specific version.
 
-export DISABLE_MD_LINTING=1
 export PRESUBMIT_TEST_FAIL_FAST=1
 
 export GO111MODULE=on