diff --git a/borg/archiver.py b/borg/archiver.py
index f948db793..c2aaecb81 100644
--- a/borg/archiver.py
+++ b/borg/archiver.py
@@ -91,7 +91,7 @@ class Archiver:
             msg = ("'check --repair' is an experimental feature that might result in data loss." +
                    "\n" +
                    "Type 'YES' if you understand this and want to continue: ")
-            if not yes(msg, false_msg="Aborting.",
+            if not yes(msg, false_msg="Aborting.", default_notty=False,
                        env_var_override='BORG_CHECK_I_KNOW_WHAT_I_AM_DOING', truish=('YES', )):
                 return EXIT_ERROR
         if not args.archives_only:
@@ -335,7 +335,7 @@ class Archiver:
                     msg.append(format_archive(archive_info))
                 msg.append("Type 'YES' if you understand this and want to continue: ")
                 msg = '\n'.join(msg)
-                if not yes(msg, false_msg="Aborting.",
+                if not yes(msg, false_msg="Aborting.", default_notty=False,
                            env_var_override='BORG_CHECK_I_KNOW_WHAT_I_AM_DOING', truish=('YES', )):
                     self.exit_code = EXIT_ERROR
                     return self.exit_code
diff --git a/borg/cache.py b/borg/cache.py
index c3f085cdc..7eb854050 100644
--- a/borg/cache.py
+++ b/borg/cache.py
@@ -54,7 +54,7 @@ class Cache:
                 msg = ("Warning: Attempting to access a previously unknown unencrypted repository!" +
                        "\n" +
                        "Do you want to continue? [yN] ")
-                if not yes(msg, false_msg="Aborting.",
+                if not yes(msg, false_msg="Aborting.", default_notty=False,
                            env_var_override='BORG_UNKNOWN_UNENCRYPTED_REPO_ACCESS_IS_OK'):
                     raise self.CacheInitAbortedError()
             self.create()
@@ -64,7 +64,7 @@ class Cache:
             msg = ("Warning: The repository at location {} was previously located at {}".format(repository._location.canonical_path(), self.previous_location) +
                    "\n" +
                    "Do you want to continue? [yN] ")
-            if not yes(msg, false_msg="Aborting.",
+            if not yes(msg, false_msg="Aborting.", default_notty=False,
                        env_var_override='BORG_RELOCATED_REPO_ACCESS_IS_OK'):
                 raise self.RepositoryAccessAborted()