diff --git a/src/frostfs_testlib/processes/remote_process.py b/src/frostfs_testlib/processes/remote_process.py
index 5624940..071675a 100644
--- a/src/frostfs_testlib/processes/remote_process.py
+++ b/src/frostfs_testlib/processes/remote_process.py
@@ -193,7 +193,7 @@ class RemoteProcess:
         )
         if "No such file or directory" in terminal.stderr:
             return None
-        elif terminal.stderr or terminal.return_code != 0:
+        elif terminal.return_code != 0:
             raise AssertionError(f"cat process {file} was not successful: {terminal.stderr}")
 
         return terminal.stdout