diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 9f13c7c..a47c6e8 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -16,21 +16,12 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
-      - name: Install dependencies
+      - name: Run tests
         run: |
-          sudo apt-get update
           sudo apt-get install -y python3 python3-venv python3-pip
-          python3 -m pip install --upgrade pip
           python3 -m venv .venv
           source .venv/bin/activate
-          pip install ".[test]"
-
-      - name: Run Pytest
-        shell: 'script -q -e -c "bash {0}"' # work around tty issues
-        env:
-          TERM: linux # fix tput for tty issue work around
-        run: |
-          source .venv/bin/activate
-          python3 -m pytest
+          python3 -m pip install ".[test]"
+          python3 -m pytest --log-level=DEBUG
diff --git a/pyproject.toml b/pyproject.toml
index e78b379..04f2e98 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -18,7 +18,7 @@ dependencies = [
     "vdirsyncer",
     "orgparse"
 ]
-version = "0.0.0"
+version = "0.0.1"
 
 [project.optional-dependencies]
 debug = ["ipdb", "ipython"]
diff --git a/src/khalorg/commands.py b/src/khalorg/commands.py
index 4489fbd..c3ec105 100644
--- a/src/khalorg/commands.py
+++ b/src/khalorg/commands.py
@@ -13,7 +13,7 @@
 
 def list_command(
         calendar: str,
-        khalorg_format: str = get_khalorg_format(),
+        khalorg_format: str | None  = None,
         start: str = 'today',
         stop: str = '1d',
         **_) -> str:
@@ -31,6 +31,7 @@ def list_command(
         stdout of the `khal list` command after post processing
 
     """
+    khalorg_format = khalorg_format or get_khalorg_format()
     args: KhalArgs = KhalArgs()
     args['-a'] = calendar
     args['-f'] = get_khal_format()
diff --git a/src/khalorg/khal/calendar.py b/src/khalorg/khal/calendar.py
index 77397dd..8a363d5 100644
--- a/src/khalorg/khal/calendar.py
+++ b/src/khalorg/khal/calendar.py
@@ -84,8 +84,8 @@ def __init__(self, name: str):
         """
         path_config: Union[str, None] = find_configuration_file()
 
-        new_item_args: list = ['khal', 'new']
-        list_args: list = ['khal', 'list', '-df', '']
+        new_item_args: list = ["python3", "-m", "khal", "new"]
+        list_args: list = ["python3", "-m", "khal", "list", "-df", ""]
 
         self._collection: CalendarCollection
         self._new_item: Callable = subprocess_callback(new_item_args)
diff --git a/src/khalorg/khal/helpers.py b/src/khalorg/khal/helpers.py
index 00ae0a9..249afbc 100644
--- a/src/khalorg/khal/helpers.py
+++ b/src/khalorg/khal/helpers.py
@@ -1,4 +1,5 @@
 import logging
+import sys
 from datetime import date, datetime
 from subprocess import STDOUT, CalledProcessError, check_output
 from typing import Callable
@@ -35,11 +36,18 @@ def is_future(timestamp: datetime | date) -> bool:
         True if the `timestamp` is in the future
 
     """
+    logging.debug(
+        "Check if timestamp %s (type: %s) is in the future",
+        timestamp,
+        type(timestamp),
+    )
     if isinstance(timestamp, datetime):
-        now: datetime = datetime.now(timestamp.tzinfo)
-        return timestamp >= now
+        now = datetime.now(timestamp.tzinfo)
     else:
-        return timestamp >= datetime.now().date()
+        now = datetime.now().date()
+
+    logging.debug("Now is %s", now)
+    return timestamp >= now
 
 
 def subprocess_callback(cmd: list) -> Callable:
@@ -56,6 +64,7 @@ def subprocess_callback(cmd: list) -> Callable:
         callback function
 
     """
+
     def callback(args: list) -> str:
         return try_check_output([*cmd, *args]).decode()
 
@@ -64,12 +73,13 @@ def callback(args: list) -> str:
 
 def try_check_output(args: list) -> bytes:
     try:
-        return check_output(args, stderr=STDOUT)
+        return check_output(args, stderr=STDOUT, executable=sys.executable)
     except CalledProcessError as error:
         error_message: str = (
             f"The following arguments were sent to khal:\n\n{' '.join(args)}"
             "\n\nNext, the following error was received from khal:\n\n"
-            f"{error.output.decode()}\n\n")
+            f"{error.output.decode()}\n\n"
+        )
         logging.critical(error_message)
         raise Exception(error_message) from error
 
diff --git a/tests/helpers.py b/tests/helpers.py
index 238fb92..588cfd6 100644
--- a/tests/helpers.py
+++ b/tests/helpers.py
@@ -413,7 +413,7 @@ def get_start_end(delta: timedelta = timedelta(hours=1),
 
     """
     # must be in the future
-    start: datetime = datetime.now() + timedelta(minutes=1)
+    start: datetime = datetime.now() + timedelta(minutes=2)
     end: datetime = start + delta
 
     if all_day:
diff --git a/tests/test_commands.py b/tests/test_commands.py
index 24ca8e8..ffcc953 100644
--- a/tests/test_commands.py
+++ b/tests/test_commands.py
@@ -1,4 +1,5 @@
 from datetime import date, datetime, timedelta
+import logging
 from os.path import join
 from tests import static
 from tests.helpers import (
@@ -84,8 +85,12 @@ def _list_test(runner, expected: OrgAgendaItem):
     expected.properties['UID'] = actual.properties['UID']
     expected.properties['CALENDAR'] = actual.properties['CALENDAR']
     expected.properties['RRULE'] = actual.properties['RRULE']
-    assert str(expected) == str(actual), f'Org item: {expected}'
 
+    logging.debug("khalorg_format: %s", khalorg_format)
+    logging.debug("Stdout: %s", stdout)
+    logging.debug("Expected: %s", expected)
+    logging.debug("Actual: %s", actual)
+    assert str(expected) == str(actual)
     # A recurring item should have a non empty rrule
     assert bool(actual.properties['RRULE']) == bool(expected.first_timestamp._repeater)  # noqa