diff --git a/composer.json b/composer.json
index 577c13a14..81940b119 100644
--- a/composer.json
+++ b/composer.json
@@ -130,7 +130,7 @@
             "php var/box.phar compile"
         ],
         "mutation": [
-            "infection --threads=4 --only-covered --logger-github=false"
+            "infection --threads=4 --only-covered --logger-github=false -vvv"
         ],
         "mutation-diff-lines": [
             "infection --threads=4 --only-covered --git-diff-lines --git-diff-base=origin/$GITHUB_BASE_REF --min-covered-msi=100 --ignore-msi-with-no-mutations"