diff --git a/packages/build-info/src/runtime/php.test.ts b/packages/build-info/src/runtime/php.test.ts
index 7ab5f933a1..86d6ff1f1a 100644
--- a/packages/build-info/src/runtime/php.test.ts
+++ b/packages/build-info/src/runtime/php.test.ts
@@ -8,9 +8,9 @@ beforeEach((ctx) => {
   ctx.fs = new NodeFS()
 })
 
-test('detects php when compose.json is present', async ({ fs }) => {
+test('detects php when composer.json is present', async ({ fs }) => {
   const cwd = mockFileSystem({
-    'compose.json': '',
+    'composer.json': '',
   })
 
   const detected = await new Project(fs, cwd).detectRuntime()
diff --git a/packages/build-info/src/runtime/php.ts b/packages/build-info/src/runtime/php.ts
index 0e30bacc7c..d281928449 100644
--- a/packages/build-info/src/runtime/php.ts
+++ b/packages/build-info/src/runtime/php.ts
@@ -3,5 +3,5 @@ import { LangRuntime } from './runtime.js'
 export class Php extends LangRuntime {
   id = 'php'
   name = 'Php'
-  configFiles = ['compose.json']
+  configFiles = ['composer.json']
 }