diff --git a/464.patch b/464.patch
new file mode 100644
index 0000000..a737abf
--- /dev/null
+++ b/464.patch
@@ -0,0 +1,48 @@
+From 77aac68d8b50df0d63e3670755afad5c3e5c7eec Mon Sep 17 00:00:00 2001
+From: Evan <evanunderscore@gmail.com>
+Date: Sat, 25 Nov 2023 21:23:16 +1100
+Subject: [PATCH] Add sanity check to shell tests
+
+---
+ test/test.py | 8 ++++++++
+ 1 file changed, 8 insertions(+)
+
+diff --git a/test/test.py b/test/test.py
+index c89912a6..d94e55ac 100755
+--- a/test/test.py
++++ b/test/test.py
+@@ -8,6 +8,7 @@
+ import subprocess
+ import sys
+ import unittest
++import unittest.util
+ from io import StringIO
+ from tempfile import NamedTemporaryFile, TemporaryFile, mkdtemp
+ 
+@@ -33,6 +34,9 @@
+ from argcomplete.completers import DirectoriesCompleter, FilesCompleter, SuppressCompleter  # noqa: E402
+ from argcomplete.lexers import split_line  # noqa: E402
+ 
++# Default max length is insufficient for troubleshooting.
++unittest.util._MAX_LENGTH = 1000
++
+ IFS = "\013"
+ COMP_WORDBREAKS = " \t\n\"'><=;|&(:"
+ 
+@@ -1239,12 +1243,16 @@ def test_comp_point(self):
+ 
+ 
+ class TestBashZshBase(TestShellBase):
++    maxDiff = None
++
+     # 'dummy' argument unused; checks multi-command registration works
+     # by passing 'prog' as the second argument.
+     install_cmd = 'eval "$(register-python-argcomplete dummy prog)"'
+ 
+     def setUp(self):
+         sh = self.repl_provider()
++        output = sh.run_command("echo ready")
++        self.assertEqual(output, "ready\r\n")
+         path = ":".join([os.path.join(BASE_DIR, "scripts"), TEST_DIR, "$PATH"])
+         sh.run_command("export PATH={0}".format(path))
+         sh.run_command("export PYTHONPATH={0}".format(BASE_DIR))
diff --git a/9c022cb2addcc3fb92fedc5ac10c9266bd816207.patch b/9c022cb2addcc3fb92fedc5ac10c9266bd816207.patch
new file mode 100644
index 0000000..702d4d4
--- /dev/null
+++ b/9c022cb2addcc3fb92fedc5ac10c9266bd816207.patch
@@ -0,0 +1,22 @@
+From 9c022cb2addcc3fb92fedc5ac10c9266bd816207 Mon Sep 17 00:00:00 2001
+From: Evan <evanunderscore@gmail.com>
+Date: Sun, 26 Nov 2023 03:06:56 +1100
+Subject: [PATCH] Work around trailing null characters
+
+---
+ test/test.py | 2 +-
+ 1 file changed, 1 insertion(+), 1 deletion(-)
+
+diff --git a/test/test.py b/test/test.py
+index d94e55a..2acba32 100755
+--- a/test/test.py
++++ b/test/test.py
+@@ -54,7 +54,7 @@ def run_command(self, command, **kwargs):
+                 raise Exception("Expected to see a newline in command response")
+             echo_cmd, actual_res = res.split("\n", 1)
+             res_without_ansi_seqs = re.sub(r"\x1b\[0m.+\x1b\[J", "", actual_res)
+-            return res_without_ansi_seqs
++            return res_without_ansi_seqs.rstrip('\x00')
+         else:
+             return res
+ 
diff --git a/python-argcomplete.spec b/python-argcomplete.spec
index 23fa6d8..8064b53 100644
--- a/python-argcomplete.spec
+++ b/python-argcomplete.spec
@@ -6,7 +6,7 @@
 %endif
 
 # Enable all tests (requires check to be true)
-%bcond all_tests 0
+%bcond all_tests 1
 
 Name:          python-argcomplete
 Summary:       Bash tab completion for argparse
@@ -15,6 +15,9 @@ Release:       %autorelease
 License:       Apache-2.0
 URL:           https://github.com/kislyuk/argcomplete
 Source0:       %pypi_source argcomplete
+# https://github.com/kislyuk/argcomplete/issues/447
+Patch:         https://patch-diff.githubusercontent.com/raw/kislyuk/argcomplete/pull/464.patch
+Patch:         https://github.com/kislyuk/argcomplete/commit/9c022cb2addcc3fb92fedc5ac10c9266bd816207.patch
 
 BuildRequires: python3-devel