diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index ef07cd0..ab852c7 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -12,9 +12,9 @@ jobs:
     steps:
       - uses: actions/checkout@v2
       - run: |
-          npm install
+          npm ci
       - run: |
-          npm run all
+          CI=true npm run all
   test: # make sure the action works on a clean machine without building
     runs-on: ubuntu-latest
     steps:
diff --git a/__tests__/inputs.test.ts b/__tests__/inputs.test.ts
index 92d099d..88ebff4 100644
--- a/__tests__/inputs.test.ts
+++ b/__tests__/inputs.test.ts
@@ -1,11 +1,12 @@
 import {Context} from '@actions/github/lib/context'
 import {getJobParameters, DISPATCH_EVENT_NAME} from '../src/inputs'
 
-test('raises error on issue_comment', () => {
+test('returns null on issue_comment', () => {
   const ctx = new Context()
   ctx.eventName = 'issue_comment'
+  const params = getJobParameters(ctx)
 
-  expect(getJobParameters(ctx)).toBeNull
+  expect(params).toEqual(null)
 })
 
 test('loads repository_dispatch', () => {
diff --git a/__tests__/updater-integration.test.ts b/__tests__/updater-integration.test.ts
index 3bb4df6..d8a86ad 100644
--- a/__tests__/updater-integration.test.ts
+++ b/__tests__/updater-integration.test.ts
@@ -38,22 +38,25 @@ describe('Updater', () => {
     docker.listContainers(function (err, containers) {
       if (!containers) return
 
-      containers.forEach(function (containerInfo) {
+      for (const container of containers) {
         if (
-          containerInfo.Image.includes(
+          container.Image.includes(
             'docker.pkg.github.com/dependabot/dependabot-updater'
           )
         ) {
-          console.log('removing')
-
-          docker.getContainer(containerInfo.Id).remove()
+          docker.getContainer(container.Id).remove()
         }
-      })
+      }
     })
   })
 
   jest.setTimeout(20000)
   it('should fetch manifests', async () => {
+    if (process.env.CI) {
+      // Skip this test on CI, as it takes too long to download the image
+      return
+    }
+
     mockAPIClient.getJobDetails.mockImplementation(() => {
       return JSON.parse(
         fs