1 files changed, 10 insertions, 0 deletions
diff --git a/cli/js/tests/internals_test.ts b/cli/js/tests/internals_test.ts
new file mode 100644
index 000000000..fb712707c
--- /dev/null
+++ b/cli/js/tests/internals_test.ts
@@ -0,0 +1,10 @@
+// Copyright 2018-2020 the Deno authors. All rights reserved. MIT license.
+import { unitTest, assert } from "./test_util.ts";
+
+unitTest(function internalsExists(): void {
+  const {
+    stringifyArgs
+    // @ts-ignore TypeScript (as of 3.7) does not support indexing namespaces by symbol
+  } = Deno[Deno.symbols.internal];
+  assert(!!stringifyArgs);
+});