diff --git a/test/fixtures/example.js b/test/fixtures/example.js
deleted file mode 100644
index b5aeff40..00000000
--- a/test/fixtures/example.js
+++ /dev/null
@@ -1,7 +0,0 @@
-module.exports = app => {
-  app.log('loaded app')
-
-  app.on('issue_comment.created', context => {
-    context.log('Comment created')
-  })
-}
diff --git a/test/fixtures/example.ts b/test/fixtures/example.ts
new file mode 100644
index 00000000..48ad706f
--- /dev/null
+++ b/test/fixtures/example.ts
@@ -0,0 +1,9 @@
+import { Application } from '../../src/application'
+
+export = (app: Application) => {
+  app.log('loaded app')
+
+  app.on('issue_comment.created', async context => {
+    context.log('Comment created')
+  })
+}
diff --git a/test/fixtures/plugin/stub-plugin.js b/test/fixtures/plugin/stub-plugin.js
deleted file mode 100644
index 37d7332f..00000000
--- a/test/fixtures/plugin/stub-plugin.js
+++ /dev/null
@@ -1 +0,0 @@
-module.exports = function () {}
diff --git a/test/fixtures/plugin/stub-plugin.ts b/test/fixtures/plugin/stub-plugin.ts
new file mode 100644
index 00000000..88690fbc
--- /dev/null
+++ b/test/fixtures/plugin/stub-plugin.ts
@@ -0,0 +1,2 @@
+// tslint:disable-next-line:no-empty
+export = () => {}