diff --git a/__tests__/lib.test.ts b/__tests__/lib.test.ts
index 5c042f2..dae2a8c 100644
--- a/__tests__/lib.test.ts
+++ b/__tests__/lib.test.ts
@@ -52,10 +52,11 @@ describe('@actions/context', () => {
     })
   })
 
-  it('works with pullRequest payloads', () => {
+  it('works with pull_request payloads', () => {
     delete process.env.GITHUB_REPOSITORY
     context.payload = {
-      pullRequest: {number: 2},
+      // eslint-disable-next-line @typescript-eslint/camelcase
+      pull_request: {number: 2},
       repository: {owner: {login: 'user'}, name: 'test'}
     }
     expect(context.issue).toEqual({
diff --git a/src/context.ts b/src/context.ts
index f2aafde..21f14c9 100644
--- a/src/context.ts
+++ b/src/context.ts
@@ -44,7 +44,7 @@ export class Context {
 
     return {
       ...this.repo,
-      number: (payload.issue || payload.pullRequest || payload).number
+      number: (payload.issue || payload.pull_request || payload).number
     }
   }