diff --git a/.gitignore b/.gitignore
index 76627ed..821ec43 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,4 +3,8 @@ venv/
 .vscode/
 __pycache__
 *.pyc
-*.egg-info
\ No newline at end of file
+*.egg-info
+.tox
+dist
+build
+gitcomp.egg-info
\ No newline at end of file
diff --git a/pyproject.toml b/pyproject.toml
index 656bc44..b5a3c46 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,8 +1,5 @@
 [build-system]
 requires = [
-    "prettytable==2.1.0",
-    "wcwidth==0.1.8",
-    "urllib3==1.25.8",
     "setuptools>=42",
     "wheel"
 ]
diff --git a/requirements.txt b/requirements.txt
index 91f298b..71ea1a9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,4 @@
 tabulate==0.8.9
-urllib3==1.25.8
+urllib3==1.26.5
 wcwidth==0.1.8
+tox==3.24.0
diff --git a/setup.py b/setup.py
index 2998e26..c584016 100644
--- a/setup.py
+++ b/setup.py
@@ -1,9 +1,12 @@
 from setuptools import setup, find_packages
 
-with open('requirements.txt') as f:
-    requirements = f.readlines()
+requirements = [
+    'tabulate == 0.8.9',
+    'urllib3 == 1.26.5',
+    'wcwidth == 0.1.8'
+]
 
-with open("README.md", "r", encoding="utf-8") as fh:
+with open('README.md', 'r', encoding='utf-8') as fh:
     long_description = fh.read()
 
 setup(
@@ -14,27 +17,27 @@
     url='https://github.com/avaish1409/gitcomp',
     description='A python based command line tool to compare Github Users or Repositories.',
     long_description=long_description,
-    long_description_content_type="text/markdown",
+    long_description_content_type='text/markdown',
     license='MIT',
-    package_dir={"": "src"},
-    packages=find_packages(where="src"),
+    package_dir={'': 'src'},
+    packages=find_packages(where='src'),
     entry_points={
         'console_scripts': [
             'gitcomp = gitcomp.__main__:main'
         ]
     },
     project_urls={
-        "Bug Tracker": "https://github.com/avaish1409/gitcomp/issues",
+        'Bug Tracker': 'https://github.com/avaish1409/gitcomp/issues',
         'Documentation': 'https://avaish1409.github.io/gitcomp/',
         'Source': 'https://github.com/avaish1409/gitcomp'
     },
     classifiers=[
-        "Programming Language :: Python :: 3",
-        "License :: OSI Approved :: MIT License",
-        "Operating System :: OS Independent",
+        'Programming Language :: Python :: 3',
+        'License :: OSI Approved :: MIT License',
+        'Operating System :: OS Independent',
     ],
     keywords='command-line-tools cli gitcomp python package compare git github',
     install_requires=requirements,
-    python_requires=">=3.6",
+    python_requires='>=3.6',
     zip_safe=False
 )
diff --git a/tests/basic_test.py b/tests/basic_test.py
new file mode 100644
index 0000000..49e02ac
--- /dev/null
+++ b/tests/basic_test.py
@@ -0,0 +1,30 @@
+import gitcomp
+
+"""
+Baisc test cases dependent on GitComp class output (as caputured in capsys)
+- usernames
+- reponames
+- null args
+"""
+
+
+def test_user(capsys):
+    gitcomp.GitComp(['avaish1409'])
+
+    out, err = capsys.readouterr()
+    print(out)
+    assert err == ''
+
+
+def test_repo(capsys):
+    gitcomp.GitComp(repos=['avaish1409/VideoChatBot'])
+
+    out, err = capsys.readouterr()
+    assert err == ''
+
+
+def test_null(capsys):
+    gitcomp.GitComp()
+
+    out, err = capsys.readouterr()
+    assert err == ''
diff --git a/tox.ini b/tox.ini
new file mode 100644
index 0000000..7db4d35
--- /dev/null
+++ b/tox.ini
@@ -0,0 +1,7 @@
+[tox]
+envlist = py39
+isolated_build=true
+
+[testenv]
+deps =  pytest
+commands = pytest