2 files changed, 10 insertions, 0 deletions
diff --git a/cli/tests/unit/unit_tests.ts b/cli/tests/unit/unit_tests.ts
index f545e55fa..6885204a3 100644
--- a/cli/tests/unit/unit_tests.ts
+++ b/cli/tests/unit/unit_tests.ts
@@ -79,3 +79,4 @@ import "./write_file_test.ts";
 import "./write_text_file_test.ts";
 import "./performance_test.ts";
 import "./version_test.ts";
+import "./websocket_test.ts";
diff --git a/cli/tests/unit/websocket_test.ts b/cli/tests/unit/websocket_test.ts
new file mode 100644
index 000000000..8e5726d44
--- /dev/null
+++ b/cli/tests/unit/websocket_test.ts
@@ -0,0 +1,9 @@
+// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
+import { assertThrows, unitTest } from "./test_util.ts";
+
+unitTest(function websocketPermissionless() {
+  assertThrows(
+    () => new WebSocket("ws://localhost"),
+    Deno.errors.PermissionDenied,
+  );
+});