diff --git a/ci/dev/test.sh b/ci/dev/test.sh
index 983b2f292..6eaa3878d 100755
--- a/ci/dev/test.sh
+++ b/ci/dev/test.sh
@@ -4,6 +4,9 @@ set -euo pipefail
 main() {
   cd "$(dirname "$0")/../.."
 
+  cd test/test-plugin
+  make -s out/index.js
+  cd $OLDPWD
   mocha -r ts-node/register ./test/*.test.ts "$@"
 }
 
diff --git a/src/node/plugin.ts b/src/node/plugin.ts
index cdd9c3d9a..f0dca2754 100644
--- a/src/node/plugin.ts
+++ b/src/node/plugin.ts
@@ -23,7 +23,10 @@ interface Plugin extends pluginapi.Plugin {
 }
 
 interface Application extends pluginapi.Application {
-  plugin: Plugin
+  /*
+   * Clone of the above without functions.
+   */
+  plugin: Omit<Plugin, "init" | "router" | "applications">
 }
 
 /**
@@ -57,7 +60,15 @@ export class PluginAPI {
       // Add plugin key to each app.
       apps.push(
         ...pluginApps.map((app) => {
-          return { ...app, plugin: p }
+          return {
+            ...app,
+            plugin: {
+              name: p.name,
+              version: p.version,
+              description: p.description,
+              modulePath: p.modulePath,
+            },
+          }
         }),
       )
     }
@@ -74,8 +85,8 @@ export class PluginAPI {
   }
 
   /**
-   * loadPlugins loads all plugins based on this.csPluginPath
-   * and this.csPlugin.
+   * loadPlugins loads all plugins based on this.csPlugin,
+   * this.csPluginPath and the built in plugins.
    */
   public async loadPlugins(): Promise<void> {
     // Built-in plugins.
diff --git a/test/plugin.test.ts b/test/plugin.test.ts
index 69c4572ee..5836deada 100644
--- a/test/plugin.test.ts
+++ b/test/plugin.test.ts
@@ -12,8 +12,7 @@ describe("plugin", () => {
     const papi = new PluginAPI(logger, path.resolve(__dirname, "test-plugin") + ":meow")
     await papi.loadPlugins()
 
-    // We remove the function fields from the application's plugins.
-    const apps = JSON.parse(JSON.stringify(await papi.applications()))
+    const apps = await papi.applications()
 
     assert.deepEqual(
       [
diff --git a/test/test-plugin/Makefile b/test/test-plugin/Makefile
new file mode 100644
index 000000000..fb66dc81a
--- /dev/null
+++ b/test/test-plugin/Makefile
@@ -0,0 +1,5 @@
+out/index.js: src/index.ts
+	yarn build
+
+node_modules: package.json yarn.lock
+	yarn