diff --git a/rwx/ps/__init__.py b/rwx/ps/__init__.py
index 5b50456..6471fff 100644
--- a/rwx/ps/__init__.py
+++ b/rwx/ps/__init__.py
@@ -14,7 +14,7 @@ def get_tuples_args(tuples) -> list[str]:
 
 
 def run(*tuples) -> subprocess.CompletedProcess:
-    return subprocess.run(get_tuples_args(tuples), capture_output=False)
+    return subprocess.run(get_tuples_args(tuples), capture_output=False, check=True)
 
 
 def run_line(*tuples, charset: str = txt.CHARSET) -> str:
@@ -23,6 +23,6 @@ def run_line(*tuples, charset: str = txt.CHARSET) -> str:
 
 
 def run_lines(*tuples, charset: str = txt.CHARSET) -> list[str]:
-    process = subprocess.run(get_tuples_args(tuples), capture_output=True)
+    process = subprocess.run(get_tuples_args(tuples), capture_output=True, check=True)
     string = process.stdout.decode(charset)
     return string.rstrip().splitlines()