diff --git a/poetry.lock b/poetry.lock
index 3820eda..5fba27b 100644
--- a/poetry.lock
+++ b/poetry.lock
@@ -200,6 +200,20 @@ pyyaml = ">=5.3.1"
 requests = ">=2.23.0"
 rich = "*"
 
+[[package]]
+name = "exceptiongroup"
+version = "1.2.0"
+description = "Backport of PEP 654 (exception groups)"
+optional = false
+python-versions = ">=3.7"
+files = [
+    {file = "exceptiongroup-1.2.0-py3-none-any.whl", hash = "sha256:4bfd3996ac73b41e9b9628b04e079f193850720ea5945fc96a08633c66912f14"},
+    {file = "exceptiongroup-1.2.0.tar.gz", hash = "sha256:91f5c769735f051a4290d52edd0858999b57e5876e9f85937691bd4c9fa3ed68"},
+]
+
+[package.extras]
+test = ["pytest (>=6)"]
+
 [[package]]
 name = "idna"
 version = "3.6"
@@ -211,6 +225,17 @@ files = [
     {file = "idna-3.6.tar.gz", hash = "sha256:9ecdbbd083b06798ae1e86adcbfe8ab1479cf864e4ee30fe4e46a003d12491ca"},
 ]
 
+[[package]]
+name = "iniconfig"
+version = "2.0.0"
+description = "brain-dead simple config-ini parsing"
+optional = false
+python-versions = ">=3.7"
+files = [
+    {file = "iniconfig-2.0.0-py3-none-any.whl", hash = "sha256:b6a85871a79d2e3b22d2d1b94ac2824226a63c6b741c88f7ae975f18b6778374"},
+    {file = "iniconfig-2.0.0.tar.gz", hash = "sha256:2d91e135bf72d31a410b17c16da610a82cb55f6b0477d1a902134b24a455b8b3"},
+]
+
 [[package]]
 name = "jinja2"
 version = "3.1.3"
@@ -332,6 +357,32 @@ files = [
     {file = "mdurl-0.1.2.tar.gz", hash = "sha256:bb413d29f5eea38f31dd4754dd7377d4465116fb207585f97bf925588687c1ba"},
 ]
 
+[[package]]
+name = "packaging"
+version = "23.2"
+description = "Core utilities for Python packages"
+optional = false
+python-versions = ">=3.7"
+files = [
+    {file = "packaging-23.2-py3-none-any.whl", hash = "sha256:8c491190033a9af7e1d931d0b5dacc2ef47509b34dd0de67ed209b5203fc88c7"},
+    {file = "packaging-23.2.tar.gz", hash = "sha256:048fb0e9405036518eaaf48a55953c750c11e1a1b68e0dd1a9d62ed0c092cfc5"},
+]
+
+[[package]]
+name = "pluggy"
+version = "1.3.0"
+description = "plugin and hook calling mechanisms for python"
+optional = false
+python-versions = ">=3.8"
+files = [
+    {file = "pluggy-1.3.0-py3-none-any.whl", hash = "sha256:d89c696a773f8bd377d18e5ecda92b7a3793cbe66c87060a6fb58c7b6e1061f7"},
+    {file = "pluggy-1.3.0.tar.gz", hash = "sha256:cf61ae8f126ac6f7c451172cf30e3e43d3ca77615509771b3a984a0730651e12"},
+]
+
+[package.extras]
+dev = ["pre-commit", "tox"]
+testing = ["pytest", "pytest-benchmark"]
+
 [[package]]
 name = "pygments"
 version = "2.17.2"
@@ -347,6 +398,28 @@ files = [
 plugins = ["importlib-metadata"]
 windows-terminal = ["colorama (>=0.4.6)"]
 
+[[package]]
+name = "pytest"
+version = "7.4.4"
+description = "pytest: simple powerful testing with Python"
+optional = false
+python-versions = ">=3.7"
+files = [
+    {file = "pytest-7.4.4-py3-none-any.whl", hash = "sha256:b090cdf5ed60bf4c45261be03239c2c1c22df034fbffe691abe93cd80cea01d8"},
+    {file = "pytest-7.4.4.tar.gz", hash = "sha256:2cf0005922c6ace4a3e2ec8b4080eb0d9753fdc93107415332f50ce9e7994280"},
+]
+
+[package.dependencies]
+colorama = {version = "*", markers = "sys_platform == \"win32\""}
+exceptiongroup = {version = ">=1.0.0rc8", markers = "python_version < \"3.11\""}
+iniconfig = "*"
+packaging = "*"
+pluggy = ">=0.12,<2.0"
+tomli = {version = ">=1.0.0", markers = "python_version < \"3.11\""}
+
+[package.extras]
+testing = ["argcomplete", "attrs (>=19.2.0)", "hypothesis (>=3.56)", "mock", "nose", "pygments (>=2.7.2)", "requests", "setuptools", "xmlschema"]
+
 [[package]]
 name = "python-dateutil"
 version = "2.8.2"
@@ -498,6 +571,17 @@ files = [
     {file = "text_unidecode-1.3-py2.py3-none-any.whl", hash = "sha256:1311f10e8b895935241623731c2ba64f4c455287888b18189350b67134a822e8"},
 ]
 
+[[package]]
+name = "tomli"
+version = "2.0.1"
+description = "A lil' TOML parser"
+optional = false
+python-versions = ">=3.7"
+files = [
+    {file = "tomli-2.0.1-py3-none-any.whl", hash = "sha256:939de3e7a6161af0c887ef91b7d41a53e7c5a1ca976325f429cb46ea9bc30ecc"},
+    {file = "tomli-2.0.1.tar.gz", hash = "sha256:de526c12914f0c550d15924c62d72abc48d6fe7364aa87328337a31007fe8a4f"},
+]
+
 [[package]]
 name = "types-python-dateutil"
 version = "2.8.19.20240106"
@@ -528,4 +612,4 @@ zstd = ["zstandard (>=0.18.0)"]
 [metadata]
 lock-version = "2.0"
 python-versions = "3.10.*"
-content-hash = "62ef5e38f7f338cc84cd2809460e5192ec7d405685cdb65d927023db89c8cb34"
+content-hash = "4fca8d814a86cd24aed12b3f2e2462cf484e4bb1b3bb8c0b6a7b920bbc08f2ca"
diff --git a/pyproject.toml b/pyproject.toml
index 791c97a..1a7d4aa 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -8,6 +8,10 @@ authors = ["mwtmurphy <hi@mwtmurphy.com>"]
 python = "3.10.*"
 cookiecutter = "^2.2.3"
 
+[tool.poetry.group.dev.dependencies]
+pytest = "^7.4.4"
+click = "^8.1.7"
+
 [build-system]
 requires = ["poetry-core"]
 build-backend = "poetry.core.masonry.api"
diff --git a/{{cookiecutter.directory_name}}/src/{{cookiecutter.package_name}}/main.py b/{{cookiecutter.directory_name}}/src/{{cookiecutter.package_name}}/main.py
index ffe5206..d23cb16 100644
--- a/{{cookiecutter.directory_name}}/src/{{cookiecutter.package_name}}/main.py
+++ b/{{cookiecutter.directory_name}}/src/{{cookiecutter.package_name}}/main.py
@@ -23,6 +23,6 @@ def main(example: int):
     '''
 
     execution_type = "default" if example == 1 else "custom"
-    response = f"main execute in mode: {execution_type}"
+    response = f"main executed in mode: {execution_type}"
 
     return response
diff --git a/{{cookiecutter.directory_name}}/tests/conftest.py b/{{cookiecutter.directory_name}}/tests/conftest.py
new file mode 100644
index 0000000..874dc79
--- /dev/null
+++ b/{{cookiecutter.directory_name}}/tests/conftest.py
@@ -0,0 +1,4 @@
+# tests/conftest.py
+
+def pytest_configure(config):
+    config.addinivalue_line("markers", "e2e: mark as end-to-end test.")
\ No newline at end of file
diff --git a/{{cookiecutter.directory_name}}/tests/test_main.py b/{{cookiecutter.directory_name}}/tests/test_main.py
index 64ecbe4..247c493 100644
--- a/{{cookiecutter.directory_name}}/tests/test_main.py
+++ b/{{cookiecutter.directory_name}}/tests/test_main.py
@@ -17,7 +17,7 @@ def runner():
     return testing.CliRunner()
 
 @mark.e2e
-def test_main_succeeds(runner: testing.CliRunner, is_caching: bool):
+def test_main_succeeds(runner: testing.CliRunner):
     '''Validates main function executes without failing.
 
     Arguments: