diff --git a/src/Composer/Factory.php b/src/Composer/Factory.php
index af468ab80..ee7e04586 100644
--- a/src/Composer/Factory.php
+++ b/src/Composer/Factory.php
@@ -704,6 +704,10 @@ class Factory
      */
     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);