diff --git a/abacus/typer_cli/app.py b/abacus/typer_cli/app.py
index 30b9fe9e..0cf941be 100644
--- a/abacus/typer_cli/app.py
+++ b/abacus/typer_cli/app.py
@@ -11,7 +11,8 @@
 from abacus.typer_cli.show import show
 
 app = typer.Typer(
-    add_completion=False, help="A minimal yet valid double entry accounting system."
+    # add_completion=False,
+    help="A minimal yet valid double entry accounting system."
 )
 app.add_typer(chart, name="chart")
 app.add_typer(ledger, name="ledger")
diff --git a/abacus/typer_cli/sample.py b/abacus/typer_cli/sample.py
new file mode 100644
index 00000000..77f2c015
--- /dev/null
+++ b/abacus/typer_cli/sample.py
@@ -0,0 +1,54 @@
+import click
+import typer
+
+app = typer.Typer()
+
+
+@app.command()
+def top():
+    """
+    Top level command, form Typer
+    """
+    print("The Typer app is at the top level")
+
+
+@app.callback()
+def callback():
+    """
+    Typer app, including Click subapp
+    """
+
+
+@click.command()
+@click.option("--name", prompt="Your name", help="The person to greet.")
+def hello(name):
+    """Simple program that greets NAME for a total of COUNT times."""
+    click.echo("Hello %s!" % name)
+
+
+typer_click_object = typer.main.get_command(app)
+
+typer_click_object.add_command(hello, "hello")
+
+from typer.testing import CliRunner
+
+typer_click_object._add_completion = False
+typer_click_object.registered_callback = lambda x: ...
+typer_click_object.pretty_exceptions_short = []
+# AttributeError: 'TyperGroup' object has no attribute 'registered_commands'
+
+runner = CliRunner()
+runner.invoke(typer_click_object, ["hello", "--name", "Camila"])
+print(runner)
+
+"""
+/home/codespace/.python/current/bin/python3 /workspaces/abacus/abacus/typer_cli/sample.py
+Traceback (most recent call last):
+  File "/workspaces/abacus/abacus/typer_cli/sample.py", line 36, in <module>
+    runner.invoke(typer_click_object, ["hello", "--name", "Camila"])
+  File "/home/codespace/.python/current/lib/python3.10/site-packages/typer/testing.py", line 20, in invoke
+    use_cli = _get_command(app)
+  File "/home/codespace/.python/current/lib/python3.10/site-packages/typer/main.py", line 341, in get_command
+    if typer_instance._add_completion:
+AttributeError: 'TyperGroup' object has no attribute '_add_completion'
+"""
diff --git a/tests/test_typer_cli.py b/tests/test_typer_cli.py
index 1d28a245..4874d05b 100644
--- a/tests/test_typer_cli.py
+++ b/tests/test_typer_cli.py
@@ -5,7 +5,7 @@
 import pytest
 from typer.testing import CliRunner
 
-from abacus.typer_cli.app import combined_typer_click_app as app
+from abacus.typer_cli.app import app
 from abacus.typer_cli.base import UserChartCLI
 from abacus.user_chart import AccountLabel, T
 
@@ -94,6 +94,7 @@ class Setting:
 @pytest.mark.parametrize("setting", [chart_setting])
 @pytest.mark.cli
 def test_script_as_setting(setting):
+    runner = CliRunner()
     with runner.isolated_filesystem() as f:
         for line in setting.script.split("\n"):
             if line:
@@ -110,6 +111,14 @@ class Line:
     comment: str | None = None
     stdout_contains: list[str] = field(default_factory=list)
 
+    @property
+    def exit_code(self):
+        match self:
+            case HappyLine(_, _):
+                return 0
+            case SadLine(_, _):
+                return 1
+
     @property
     def args(self):
         return split(self.script)
@@ -127,6 +136,31 @@ class SadLine(Line):
     ...
 
 
+import subprocess
+
+
+def assert_subprocess(command: str, line: Line):
+    args = [command] + line.args
+    result = subprocess.run(args, text=True, capture_output=True)
+    print
+    print(result.stdout)
+    print(result.stderr)
+    assert result.returncode == line.exit_code
+    for s in line.stdout_contains:
+        assert s in result.stdout
+
+
+def test_post_zzz():
+    h = (
+        HappyLine(
+            "post --entry asset:cash capital:eq 1000 --credit income:sales 50 --credit liability:vat 10 --debit asset:ar 60 --strict"
+        )
+        .prints("True")
+        .prints("income:sales")
+    )
+    assert_subprocess("bx", h)
+
+
 def all_happy(script: str):
     return [HappyLine(line) for line in script.split("\n") if line]
 
@@ -141,10 +175,6 @@ def all_happy(script: str):
         [HappyLine("ledger init")],
         [SadLine("ledger unlink --yes")],
         [HappyLine("ledger init"), HappyLine("ledger unlink --yes")],
-        [HappyLine(
-            "post --entry asset:cash capital:eq 1000 --credit income:sales 50 --credit liability:vat 10 --debit asset:ar 60 --strict"
-        ).prints("True").prints("income:sales")
-        ],
         all_happy(
             """
 chart init
@@ -157,6 +187,7 @@ def all_happy(script: str):
 )
 @pytest.mark.cli
 def test_by_line(lines):
+    runner = CliRunner()
     with runner.isolated_filesystem():
         for line in lines:
             print(line)
diff --git a/tests/x.py b/tests/x.py
new file mode 100644
index 00000000..268008d2
--- /dev/null
+++ b/tests/x.py
@@ -0,0 +1,4 @@
+import subprocess
+
+r = subprocess.run(["echo", "100"], text=True, capture_output=True)
+print(r)