diff --git a/b2/_internal/_cli/autocomplete_install.py b/b2/_internal/_cli/autocomplete_install.py
index 12a6b99e..57b08f50 100644
--- a/b2/_internal/_cli/autocomplete_install.py
+++ b/b2/_internal/_cli/autocomplete_install.py
@@ -7,8 +7,12 @@
 # License https://www.backblaze.com/using_b2_code.html
 #
 ######################################################################
+from __future__ import annotations
+
 import abc
 import logging
+import os
+import pty
 import re
 import shutil
 import subprocess
@@ -16,7 +20,6 @@
 from datetime import datetime
 from pathlib import Path
 from shlex import quote
-from typing import List
 
 import argcomplete
 from class_registry import ClassRegistry, RegistryKeyError
@@ -91,7 +94,7 @@ def get_script_path(self) -> Path:
 
     def program_in_path(self) -> bool:
         """Check if the given program is in PATH."""
-        return _silent_success_run([self.shell_exec, '-c', self.prog])
+        return _silent_pty_run([self.shell_exec, '-c', self.prog])
 
     @abc.abstractmethod
     def is_enabled(self) -> bool:
@@ -130,7 +133,7 @@ def get_script_path(self) -> Path:
 
     def is_enabled(self) -> bool:
         """Check if autocompletion is enabled."""
-        return _silent_success_run([self.shell_exec, '-i', '-c', f'complete -p {quote(self.prog)}'])
+        return _silent_pty_run([self.shell_exec, '-i', '-c', f'complete -p {quote(self.prog)}'])
 
 
 @SHELL_REGISTRY.register('bash')
@@ -157,7 +160,7 @@ def get_script_path(self) -> Path:
         return Path("~/.zsh/completion/").expanduser() / f"_{self.prog}"
 
     def is_enabled(self) -> bool:
-        return _silent_success_run(
+        return _silent_pty_run(
             [self.shell_exec, '-i', '-c', f'[[ -v _comps[{quote(self.prog)}] ]]']
         )
 
@@ -185,14 +188,17 @@ def is_enabled(self) -> bool:
         return self.get_script_path().exists()
 
 
-def _silent_success_run(cmd: List[str]) -> bool:
-    p = subprocess.Popen(cmd, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+def _silent_pty_run(cmd: list[str]) -> bool:
+    master_fd, stdin = pty.openpty()
+    p = subprocess.Popen(cmd, stdin=stdin, stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+    os.close(stdin)
     stdout, stderr = p.communicate()
     if p.returncode != 0:
         logger.debug(
             "Command %s exited with code %d, stdout: %s, stderr: %s", cmd, p.returncode, stdout,
             stderr
         )
+    os.close(master_fd)
     return p.returncode == 0