diff --git a/check_http_json.py b/check_http_json.py
index 0b5e908..e4d70c3 100755
--- a/check_http_json.py
+++ b/check_http_json.py
@@ -398,7 +398,7 @@ class JsonRuleProcessor:
         return ("%s" % metrics, warning, critical)
 
 
-def parseArgs():
+def parseArgs(args):
     """
     CLI argument definitions and parsing
     """
@@ -497,7 +497,7 @@ def parseArgs():
                         (key[>alias],UnitOfMeasure,WarnRange,
                         CriticalRange).''')
 
-    return parser.parse_args()
+    return parser.parse_args(args)
 
 
 def debugPrint(debug_flag, message, pretty_flag=False):
@@ -514,7 +514,8 @@ def debugPrint(debug_flag, message, pretty_flag=False):
 
 """Program entry point"""
 if __name__ == "__main__":
-    args = parseArgs()
+
+    args = parseArgs(sys.argv[1:])
     nagios = NagiosHelper()
     context = None
 
diff --git a/test/test_args.py b/test/test_args.py
new file mode 100644
index 0000000..b2d90e4
--- /dev/null
+++ b/test/test_args.py
@@ -0,0 +1,29 @@
+#!/usr/bin/env python3
+
+
+import unittest
+import sys
+
+sys.path.append('..')
+
+from check_http_json import *
+
+
+class ArgsTest(unittest.TestCase):
+    """
+    Tests for argsparse
+    """
+
+    def test_parser_defaults(self):
+        parser = parseArgs(['-H', 'foobar'])
+        self.assertFalse(parser.debug)
+        self.assertFalse(parser.ssl)
+        self.assertFalse(parser.insecure)
+
+    def test_parser_with_debug(self):
+        parser = parseArgs(['-H', 'foobar', '-d'])
+        self.assertTrue(parser.debug)
+
+    def test_parser_with_port(self):
+        parser = parseArgs(['-H', 'foobar', '-P', '8888'])
+        self.assertEqual(parser.port, '8888')