diff --git a/docs/appendices/file-formats/app-json.md b/docs/appendices/file-formats/app-json.md
index 842674376..b3cd72c7b 100644
--- a/docs/appendices/file-formats/app-json.md
+++ b/docs/appendices/file-formats/app-json.md
@@ -23,7 +23,7 @@
 - `command`: (string, required)
 - `maintenance`: (boolean, optional)
 - `schedule`: (string, required)
-- `concurrency_policy`: (string, optional, default: `allow`, options: `allow`, `deny`, `replace`)
+- `concurrency_policy`: (string, optional, default: `allow`, options: `allow`, `forbid`, `replace`)
 
 ## Formation
 
diff --git a/plugins/cron/subcommands.go b/plugins/cron/subcommands.go
index 233361953..c47fa3289 100644
--- a/plugins/cron/subcommands.go
+++ b/plugins/cron/subcommands.go
@@ -42,7 +42,7 @@ func CommandList(appName string, format string) error {
 	}
 
 	if format == "stdout" {
-		output := []string{"ID | Schedule | Maintenance | Command"}
+		output := []string{"ID | Schedule | Concurrency | Maintenance | Command"}
 		for _, task := range tasks {
 			maintenance := "false"
 			if task.Maintenance {
@@ -52,7 +52,7 @@ func CommandList(appName string, format string) error {
 					maintenance = "true (app)"
 				}
 			}
-			output = append(output, fmt.Sprintf("%s | %s | %s | %s", task.ID, task.Schedule, maintenance, task.Command))
+			output = append(output, fmt.Sprintf("%s | %s | %s | %t | %s", task.ID, task.Schedule, task.ConcurrencyPolicy, maintenance, task.Command))
 		}
 
 		result := columnize.SimpleFormat(output)
diff --git a/plugins/scheduler-docker-local/scheduler-run b/plugins/scheduler-docker-local/scheduler-run
index 096210dc3..0df116077 100755
--- a/plugins/scheduler-docker-local/scheduler-run
+++ b/plugins/scheduler-docker-local/scheduler-run
@@ -66,7 +66,6 @@ trigger-scheduler-docker-local-scheduler-run() {
     if [[ -n "$DOKKU_CONCURRENCY_POLICY" ]]; then
       concurrency_policy="$DOKKU_CONCURRENCY_POLICY"
     fi
-    concurrency_policy="$DOKKU_CONCURRENCY_POLICY"
     DOCKER_ARGS+=" --label=com.dokku.concurrency-policy=$concurrency_policy"
 
     if [[ "$concurrency_policy" == "forbid" ]]; then
diff --git a/tests/unit/cron.bats b/tests/unit/cron.bats
index 671e8f58f..fa5d8a0e4 100644
--- a/tests/unit/cron.bats
+++ b/tests/unit/cron.bats
@@ -235,6 +235,30 @@ teardown() {
   assert_output "['task.py', 'schedule', 'now']"
 }
 
+@test "(cron) cron:run concurrency_policy forbid" {
+  run deploy_app dockerfile dokku@$DOKKU_DOMAIN:$TEST_APP template_cron_file_concurrency_forbid
+  echo "output: $output"
+  echo "status: $status"
+  assert_success
+  
+  cron_id="$(dokku cron:list $TEST_APP --format json | jq -r '.[0].id')"
+  run /bin/bash -c "echo cron $cron_id"
+  echo "output: $output"
+  echo "status: $status"
+  assert_success
+  assert_output_exists
+
+  run /bin/bash -c "dokku cron:run $TEST_APP $cron_id --detach"
+  echo "output: $output"
+  echo "status: $status"
+  assert_success
+
+  run /bin/bash -c "dokku cron:run $TEST_APP $cron_id"
+  echo "output: $output"
+  echo "status: $status"
+  assert_failure
+}
+
 @test "(cron) cron:suspend cron:resume" {
   run deploy_app python dokku@$DOKKU_DOMAIN:$TEST_APP template_cron_file_valid_multiple
   echo "output: $output"
@@ -427,3 +451,21 @@ template_cron_file_valid_multiple() {
 }
 EOF
 }
+
+template_cron_file_concurrency_forbid() {
+  local APP="$1"
+  local APP_REPO_DIR="$2"
+  [[ -z "$APP" ]] && local APP="$TEST_APP"
+  echo "injecting valid cron app.json -> $APP_REPO_DIR/app.json"
+  cat <<EOF >"$APP_REPO_DIR/app.json"
+{
+  "cron": [
+    {
+      "command": "sleep 5",
+      "schedule": "0 0 * * *",
+      "concurrency_policy": "forbid"
+    }
+  ]
+}
+EOF
+}