diff --git a/src/Gitonomy/Git/Repository.php b/src/Gitonomy/Git/Repository.php
index fe77a88..091ddba 100644
--- a/src/Gitonomy/Git/Repository.php
+++ b/src/Gitonomy/Git/Repository.php
@@ -543,7 +543,7 @@ public function run($command, $args = [])
 
         $process->run();
 
-        $output = $process->getOutput();
+        $output = $process->getOutput() ?: $process->getErrorOutput();
 
         if ($this->logger && $this->debug) {
             $duration = microtime(true) - $before;