diff --git a/composer.json b/composer.json
index 7f06bdd..9d85cda 100644
--- a/composer.json
+++ b/composer.json
@@ -15,7 +15,7 @@
         "wp-cli/wp-cli": "^2.5"
     },
     "require-dev": {
-        "wp-cli/wp-cli-tests": "^3.1"
+        "wp-cli/wp-cli-tests": "^4"
     },
     "config": {
         "process-timeout": 7200,