diff --git a/.travis.yml b/.travis.yml
index 8b9bc9d..5ec9e19 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -4,6 +4,8 @@ python:
   - '3.6'
 install:
   - pip install -r requirements.txt
+script:
+  - pytest
 deploy:
   provider: pypi
   user: Dev-Oss
diff --git a/liccheck/command_line.py b/liccheck/command_line.py
index d39d3dd..b7c0dc0 100644
--- a/liccheck/command_line.py
+++ b/liccheck/command_line.py
@@ -7,6 +7,7 @@
 import sys
 
 import pkg_resources
+
 try:
     from pip._internal.download import PipSession
 except ImportError:
@@ -165,15 +166,22 @@ def read_strategy(strategy_file):
     return strategy
 
 
-def main():
+def parse_args(args):
     parser = argparse.ArgumentParser(description='Check license of packages and there dependencies.')
     parser.add_argument('-s', '--sfile', dest='strategy_ini_file', help='strategy ini file', required=True)
     parser.add_argument('-r', '--rfile', dest='requirement_txt_file', help='path/to/requirement.txt file', nargs='?',
                         default='./requirements.txt')
-    args = parser.parse_args()
+    return parser.parse_args(args)
+
 
+def run(args):
     strategy = read_strategy(args.strategy_ini_file)
-    sys.exit(process(args.requirement_txt_file, strategy))
+    return process(args.requirement_txt_file, strategy)
+
+
+def main():
+    args = parse_args(sys.argv[1:])
+    sys.exit(run(args))
 
 
 if __name__ == "__main__":
diff --git a/tests/test_cli.py b/tests/test_cli.py
new file mode 100644
index 0000000..0caf02f
--- /dev/null
+++ b/tests/test_cli.py
@@ -0,0 +1,23 @@
+from liccheck.command_line import parse_args, read_strategy, run
+
+
+def test_parse_arguments():
+    args = parse_args(['--sfile', 'my_strategy.ini'])
+    assert args.strategy_ini_file == 'my_strategy.ini'
+    assert args.requirement_txt_file == './requirements.txt'
+    args = parse_args(['--sfile', 'my_strategy.ini', '--rfile', 'my_requirements.txt'])
+    assert args.strategy_ini_file == 'my_strategy.ini'
+    assert args.requirement_txt_file == 'my_requirements.txt'
+
+
+def test_read_strategy():
+    args = parse_args(['--sfile', '../license_strategy.ini'])
+    strategy = read_strategy(args.strategy_ini_file)
+    assert len(strategy.AUTHORIZED_LICENSES) > 0
+    assert len(strategy.AUTHORIZED_PACKAGES) > 0
+    assert len(strategy.UNAUTHORIZED_LICENSES) > 0
+
+
+def test_run():
+    args = parse_args(['--sfile', '../license_strategy.ini', '--rfile', '../requirements.txt'])
+    run(args)