diff --git a/composer/spec/fixtures/projects/invalid_version_string/composer.json b/composer/spec/fixtures/projects/invalid_version_string/composer.json
index 02132b6fb95..8079a415c08 100644
--- a/composer/spec/fixtures/projects/invalid_version_string/composer.json
+++ b/composer/spec/fixtures/projects/invalid_version_string/composer.json
@@ -2,6 +2,6 @@
   "name": "valid/name",
   "version": "3.1.7",
   "require": {
-    "monolog/monolog" : "^3.0|4.1.x-dev as 3.0.0"
+    "monolog/monolog" : "^3.0|feature-branch as 3.0.0"
   }
 }