diff --git a/lib/main.ts b/lib/main.ts
index c2aebde15..4890837d8 100644
--- a/lib/main.ts
+++ b/lib/main.ts
@@ -1,4 +1,8 @@
 // This is only for the benefit of the LanguageClient.
+// @ts-ignore
 import type Deno from '../vendor/deno/types.d.ts';
 
-console.log(Deno.args);
+// @ts-ignore
+import test from './other.ts';
+
+test(Deno.args);
diff --git a/lib/other.ts b/lib/other.ts
new file mode 100644
index 000000000..247226c62
--- /dev/null
+++ b/lib/other.ts
@@ -0,0 +1,3 @@
+export default function(args: Array<string>) {
+  console.log(...args);
+}
diff --git a/tsconfig.json b/tsconfig.json
index e69de29bb..e1529ad3c 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -0,0 +1,3 @@
+{
+  "include": ["src/**/*.ts", "vendor/deno/types.d.ts"]
+}