diff --git a/psh/tools/psh.py b/psh/tools/psh.py
index add264b7c..2a66f70c1 100644
--- a/psh/tools/psh.py
+++ b/psh/tools/psh.py
@@ -50,15 +50,15 @@ def _check_result(pexpect_proc, result):
                         'Please choose between susccess/fail/dont-check')))
 
 
-def assert_cmd(pexpect_proc, cmd, *, expected='', result='success', msg='', is_regex=False):
-    ''' Sends specified command and asserts that it's displayed correctly
-    with optional expected output and next prompt. Exit status is asserted depending on `result`'''
+def assert_cmd(pexpect_proc, cmd, *, expected="", result="success", msg="", is_regex=False, timeout=30):
+    """Sends specified command and asserts that it's displayed correctly
+    with optional expected output and next prompt. Exit status is asserted depending on `result`"""
     pexpect_proc.sendline(cmd)
     cmd = re.escape(cmd)
-    exp_regex = ''
+    exp_regex = ""
     if is_regex:
         exp_regex = expected
-    elif expected != '':
+    elif expected != "":
         if not (isinstance(expected, tuple) or isinstance(expected, list)):
             expected = tuple((expected,))
         for line in expected:
@@ -67,9 +67,9 @@ def assert_cmd(pexpect_proc, cmd, *, expected='', result='success', msg='', is_r
 
     exp_regex = cmd + EOL + exp_regex + PROMPT
     exp_readable = _readable(exp_regex)
-    msg = f'Expected output regex was: \n---\n{exp_readable}\n---\n' + msg
+    msg = f"Expected output regex was: \n---\n{exp_readable}\n---\n" + msg
 
-    assert pexpect_proc.expect([exp_regex, pexpect.TIMEOUT, pexpect.EOF]) == 0, msg
+    assert pexpect_proc.expect([exp_regex, pexpect.TIMEOUT, pexpect.EOF], timeout=timeout) == 0, msg
 
     _check_result(pexpect_proc, result)