diff --git a/types/workbox-webpack-plugin/tsconfig.json b/types/workbox-webpack-plugin/tsconfig.json
index cabf425dbe..0b25eabf98 100644
--- a/types/workbox-webpack-plugin/tsconfig.json
+++ b/types/workbox-webpack-plugin/tsconfig.json
@@ -18,6 +18,6 @@
     },
     "files": [
         "index.d.ts",
-        "rx-node-tests.ts"
+        "workbox-tests.ts"
     ]
 }
\ No newline at end of file
diff --git a/types/workbox-webpack-plugin/tslint.json b/types/workbox-webpack-plugin/tslint.json
index e595b70d63..f93cf8562a 100644
--- a/types/workbox-webpack-plugin/tslint.json
+++ b/types/workbox-webpack-plugin/tslint.json
@@ -1,3 +1,3 @@
 {
-    "extends": "dtslint/dt.json",
+    "extends": "dtslint/dt.json"
 }
diff --git a/types/workbox-webpack-plugin/workbox-tests.ts b/types/workbox-webpack-plugin/workbox-tests.ts
index 5d1ba8f272..0562d8f797 100644
--- a/types/workbox-webpack-plugin/workbox-tests.ts
+++ b/types/workbox-webpack-plugin/workbox-tests.ts
@@ -1,15 +1,15 @@
 
-import { GenerateSW, InjectManifest } from './index'
+import { GenerateSW, InjectManifest } from './index';
 
 // GenerateSW
 {
-  let plugin: GenerateSW
+  let plugin: GenerateSW;
 
   // No options object
-  plugin = new GenerateSW()
+  plugin = new GenerateSW();
 
   // Empty options object
-  plugin = new GenerateSW({})
+  plugin = new GenerateSW({});
 
   // With all of the examples
   plugin = new GenerateSW({
@@ -120,24 +120,24 @@ import { GenerateSW, InjectManifest } from './index'
         const manifest = originalManifest.filter(
           (entry) => entry.url !== 'ignored.html');
         // Optionally, set warning messages.
-        const warnings = [];
-        return {manifest, warnings};
+        const warnings = ['warning'];
+        return {manifest, warnings: [] };
       }
     ]
-  })
+  });
 }
 
 // InjectManifest
 {
-  let plugin: InjectManifest
+  let plugin: InjectManifest;
 
   // No options object
-  plugin = new InjectManifest()
+  plugin = new InjectManifest();
 
   // Minimal options object (swSrc is required)
   plugin = new InjectManifest({
     swSrc: 'service-worker.js'
-  })
+  });
 
   // With all of the examples
   plugin = new InjectManifest({
@@ -182,9 +182,9 @@ import { GenerateSW, InjectManifest } from './index'
         const manifest = originalManifest.filter(
           (entry) => entry.url !== 'ignored.html');
         // Optionally, set warning messages.
-        const warnings = [];
+        const warnings = ['warning'];
         return {manifest, warnings};
       }
     ]
-  })
+  });
 }
\ No newline at end of file