diff --git a/types/keystonejs__keystone/index.d.ts b/types/keystonejs__keystone/index.d.ts
index 39e26c5dee..731d79088b 100644
--- a/types/keystonejs__keystone/index.d.ts
+++ b/types/keystonejs__keystone/index.d.ts
@@ -17,7 +17,9 @@ declare module '@keystonejs/keystone' {
 
     class BaseKeystoneAdapter {}
     class BaseAuthStrategy {}
-    class BaseApp {}
+    class BaseApp {
+        build(args?: { distDir: string; keystone: Keystone }): void | Promise<void>;
+    }
 
     interface KeystoneOptions {
         name: string;
diff --git a/types/keystonejs__keystone/keystonejs__keystone-tests.ts b/types/keystonejs__keystone/keystonejs__keystone-tests.ts
index d8c8f91968..117e1ec52e 100644
--- a/types/keystonejs__keystone/keystonejs__keystone-tests.ts
+++ b/types/keystonejs__keystone/keystonejs__keystone-tests.ts
@@ -115,8 +115,13 @@ const apps: BaseApp[] = [
     }),
 ];
 
-keystone
-    .prepare({ apps, dev: process.env.NODE_ENV !== 'production' })
-    .then(async ({ middlewares }) => {
-        await keystone.connect();
-    });
+apps.map(app =>
+    app.build({
+        distDir: '.',
+        keystone,
+    }),
+);
+
+keystone.prepare({ apps, dev: process.env.NODE_ENV !== 'production' }).then(async ({ middlewares }) => {
+    await keystone.connect();
+});