diff --git a/thefuck/rules/prove_recursively.py b/thefuck/rules/prove_recursively.py
index fad5a63c..224a4e67 100644
--- a/thefuck/rules/prove_recursively.py
+++ b/thefuck/rules/prove_recursively.py
@@ -16,7 +16,7 @@ def _isdir(part):
 @for_app('prove')
 def match(command):
     return (
-        'NOTESTS' in command.stdout
+        'NOTESTS' in command.output
         and not any(_is_recursive(part) for part in command.script_parts[1:])
         and any(_isdir(part) for part in command.script_parts[1:]))