diff --git a/src/Composer/Factory.php b/src/Composer/Factory.php
index af468ab803c4..4bfa8a0bd2af 100644
--- a/src/Composer/Factory.php
+++ b/src/Composer/Factory.php
@@ -704,6 +704,10 @@ private static function getUserDir(): string
      */
     private static function validateJsonSchema(?IOInterface $io, $fileOrData, int $schema = JsonFile::LAX_SCHEMA, ?string $source = null): void
     {
+        if (!Platform::isInputCompletionProcess()) {
+            return;
+        }
+
         try {
             if ($fileOrData instanceof JsonFile) {
                 $fileOrData->validateSchema($schema);