diff --git a/README.md b/README.md
index 7d23b7b..234c3f6 100644
--- a/README.md
+++ b/README.md
@@ -272,7 +272,7 @@ Usage: ./cli.py format-file [OPTIONS] FILE_PATH
 │                                 in .editorconfig                                                 │
 │                                 [default: 119]                                                   │
 │ --darker-prefixes      TEXT     Apply prefixes via autopep8 before calling darker.               │
-│                                 [default: E302,E303,E305,W391]                                   │
+│                                 [default: E301,E302,E303,E305,W391]                              │
 │ --help                          Show this message and exit.                                      │
 ╰──────────────────────────────────────────────────────────────────────────────────────────────────╯
 ```
diff --git a/manageprojects/constants.py b/manageprojects/constants.py
index 17d2923..a541791 100644
--- a/manageprojects/constants.py
+++ b/manageprojects/constants.py
@@ -16,6 +16,7 @@
 FORMAT_PY_FILE_DARKER_PRE_FIXES = ','.join(
     sorted(
         [
+            'E301',  # expected 1 blank line
             'E302',  # expected 2 blank lines
             'E303',  # too many blank lines
             'W391',  # blank line at end of file
diff --git a/manageprojects/test_utils/click_cli_utils.py b/manageprojects/test_utils/click_cli_utils.py
index 437fcf2..14c17ce 100644
--- a/manageprojects/test_utils/click_cli_utils.py
+++ b/manageprojects/test_utils/click_cli_utils.py
@@ -4,7 +4,7 @@
 import rich_click
 from bx_py_utils.path import assert_is_file
 from bx_py_utils.test_utils.context_managers import MassContextManager
-from click.testing import CliRunner
+from click.testing import CliRunner, Result
 
 from manageprojects.utilities.subprocess_utils import verbose_check_output
 
@@ -30,6 +30,11 @@ class ForceRichTerminalWidth(MassContextManager):
     )
 
 
+class ClickInvokeCliException(Exception):
+    def __init__(self, result: Result):
+        self.result = result
+
+
 def invoke_click(cli, *args, expected_stderr='', expected_exit_code=0, strip=True, **kwargs):
     assert isinstance(cli, click.Command)
 
@@ -37,7 +42,10 @@ def invoke_click(cli, *args, expected_stderr='', expected_exit_code=0, strip=Tru
 
     with ForceRichTerminalWidth():
         runner = CliRunner(mix_stderr=False)
-        result = runner.invoke(cli=cli, args=args, **kwargs, color=False)
+        result: Result = runner.invoke(cli=cli, args=args, **kwargs, color=False)
+
+    if result.exception:
+        raise ClickInvokeCliException(result) from result.exception
 
     stdout = result.stdout
     stderr = result.stderr
diff --git a/manageprojects/tests/test_click_cli_utils.py b/manageprojects/tests/test_click_cli_utils.py
new file mode 100644
index 0000000..8727ae5
--- /dev/null
+++ b/manageprojects/tests/test_click_cli_utils.py
@@ -0,0 +1,20 @@
+from unittest.mock import patch
+
+from click.testing import Result
+
+from manageprojects.cli import cli_app
+from manageprojects.cli.cli_app import cli
+from manageprojects.test_utils.click_cli_utils import ClickInvokeCliException, invoke_click
+from manageprojects.tests.base import BaseTestCase
+
+
+class CliTestCase(BaseTestCase):
+    def test_invoke_click(self):
+        with patch.object(cli_app, 'verbose_check_call', side_effect=RuntimeError('Bam!')):
+            with self.assertRaises(ClickInvokeCliException) as cm:
+                invoke_click(cli, 'install')
+
+        self.assertIsInstance(cm.exception, ClickInvokeCliException)
+        self.assertIsInstance(cm.exception.result, Result)
+        self.assertIsInstance(cm.exception.result.exception, RuntimeError)
+        self.assertEqual(cm.exception.result.exception.args, ('Bam!',))
diff --git a/pyproject.toml b/pyproject.toml
index 5cf0ede..9404f24 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [project]
 name = "manageprojects"
-version = "0.9.1"
+version = "0.9.2"
 description = "Manage Python / Django projects"
 readme = "README.md"
 authors = [
diff --git a/requirements.dev.txt b/requirements.dev.txt
index c21e4f1..002918d 100644
--- a/requirements.dev.txt
+++ b/requirements.dev.txt
@@ -411,7 +411,8 @@ keyring==23.13.1 \
     --hash=sha256:ba2e15a9b35e21908d0aaf4e0a47acc52d6ae33444df0da2b49d41a46ef6d678
     # via twine
 markdown-it-py==2.2.0 \
-    --hash=sha256:5a35f8d1870171d9acc47b99612dc146129b631baf04970128b568f190d0cc30
+    --hash=sha256:5a35f8d1870171d9acc47b99612dc146129b631baf04970128b568f190d0cc30 \
+    --hash=sha256:7c9a5e412688bc771c67432cbfebcdd686c93ce6484913dccf06cb5a0bea35a1
     # via rich
 markupsafe==2.1.2 \
     --hash=sha256:0576fe974b40a400449768941d5d0858cc624e3249dfd1e0c33674e5c7ca7aed \
@@ -594,9 +595,9 @@ python-dateutil==2.8.2 \
     --hash=sha256:0123cacc1627ae19ddf3c27a5de5bd67ee4586fbdd6440d9748f8abb483d3e86 \
     --hash=sha256:961d03dc3453ebbc59dbdea9e4e11c5651520a876d0f4db161e8674aae935da9
     # via arrow
-python-slugify==8.0.0 \
-    --hash=sha256:51f217508df20a6c166c7821683384b998560adcf8f19a6c2ca8b460528ccd9c \
-    --hash=sha256:f1da83f3c7ab839b3f84543470cd95bdb5a81f1a0b80fed502f78b7dca256062
+python-slugify==8.0.1 \
+    --hash=sha256:70ca6ea68fe63ecc8fa4fcf00ae651fc8a5d02d93dcd12ae6d4fc7ca46c4d395 \
+    --hash=sha256:ce0d46ddb668b3be82f4ed5e503dbc33dd815d83e2eb6824211310d3fb172a27
     # via cookiecutter
 pyupgrade==3.3.1 \
     --hash=sha256:3b93641963df022d605c78aeae4b5956a5296ea24701eafaef9c487527b77e60 \
@@ -793,9 +794,9 @@ wheel==0.38.4 \
     --hash=sha256:965f5259b566725405b05e7cf774052044b1ed30119b5d586b2703aafe8719ac \
     --hash=sha256:b60533f3f5d530e971d6737ca6d58681ee434818fab630c83a734bb10c083ce8
     # via pip-tools
-zipp==3.14.0 \
-    --hash=sha256:188834565033387710d046e3fe96acfc9b5e86cbca7f39ff69cf21a4128198b7 \
-    --hash=sha256:9e5421e176ef5ab4c0ad896624e87a7b2f07aca746c9b2aa305952800cb8eecb
+zipp==3.15.0 \
+    --hash=sha256:112929ad649da941c23de50f356a2b5570c954b65150642bccdd66bf194d224b \
+    --hash=sha256:48904fc76a60e542af151aded95726c1a5c34ed43ab4134b597665c86d7ad556
     # via importlib-metadata
 
 # The following packages are considered to be unsafe in a requirements file:
diff --git a/requirements.txt b/requirements.txt
index 07ff4e0..cba8511 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -192,7 +192,8 @@ jinja2-time==0.2.0 \
     --hash=sha256:d3eab6605e3ec8b7a0863df09cc1d23714908fa61aa6986a845c20ba488b4efa
     # via cookiecutter
 markdown-it-py==2.2.0 \
-    --hash=sha256:5a35f8d1870171d9acc47b99612dc146129b631baf04970128b568f190d0cc30
+    --hash=sha256:5a35f8d1870171d9acc47b99612dc146129b631baf04970128b568f190d0cc30 \
+    --hash=sha256:7c9a5e412688bc771c67432cbfebcdd686c93ce6484913dccf06cb5a0bea35a1
     # via rich
 markupsafe==2.1.2 \
     --hash=sha256:0576fe974b40a400449768941d5d0858cc624e3249dfd1e0c33674e5c7ca7aed \
@@ -327,9 +328,9 @@ python-dateutil==2.8.2 \
     --hash=sha256:0123cacc1627ae19ddf3c27a5de5bd67ee4586fbdd6440d9748f8abb483d3e86 \
     --hash=sha256:961d03dc3453ebbc59dbdea9e4e11c5651520a876d0f4db161e8674aae935da9
     # via arrow
-python-slugify==8.0.0 \
-    --hash=sha256:51f217508df20a6c166c7821683384b998560adcf8f19a6c2ca8b460528ccd9c \
-    --hash=sha256:f1da83f3c7ab839b3f84543470cd95bdb5a81f1a0b80fed502f78b7dca256062
+python-slugify==8.0.1 \
+    --hash=sha256:70ca6ea68fe63ecc8fa4fcf00ae651fc8a5d02d93dcd12ae6d4fc7ca46c4d395 \
+    --hash=sha256:ce0d46ddb668b3be82f4ed5e503dbc33dd815d83e2eb6824211310d3fb172a27
     # via cookiecutter
 pyupgrade==3.3.1 \
     --hash=sha256:3b93641963df022d605c78aeae4b5956a5296ea24701eafaef9c487527b77e60 \