diff --git a/fizzbuzzx.py b/fizzbuzzx.py
index 3a4394d..7f2c1b6 100755
--- a/fizzbuzzx.py
+++ b/fizzbuzzx.py
@@ -3,7 +3,7 @@
 import argparse
 import logging
 import sys
-from typing import List
+from typing import Any, List, Optional, Sequence
 
 logging.basicConfig(
     level=logging.DEBUG,
@@ -144,11 +144,12 @@ def input_validation(fizzbuzz_input) -> int:
     return number
 
 
-def fizzbuzz_cli():
+def fizzbuzzx_cli(args: Optional[Sequence[Any]] = None):
     """CLI for fizzbuzz."""
+
     fizzbuzz_parser = argparse.ArgumentParser(description="Fizzbuzz!!!")
-    fizzbuzz_parser.add_argument("number", type=str, help="Input number to print up to")
-    fizzbuzz_args = fizzbuzz_parser.parse_args()
+    fizzbuzz_parser.add_argument("number", type=int, help="Input number to print up to")
+    fizzbuzz_args = fizzbuzz_parser.parse_args(args)
     number = input_validation(fizzbuzz_args.number)
     print(fizzbuzz(number))
 
diff --git a/test_fizzbuzzx.py b/test_fizzbuzzx.py
index fb928ce..72438b9 100644
--- a/test_fizzbuzzx.py
+++ b/test_fizzbuzzx.py
@@ -1,5 +1,6 @@
+
 """Test file for fizzbuzz."""
-from fizzbuzzx import check_buzz, check_fizz, check_fizzbuzz, fizzbuzz
+from fizzbuzzx import check_buzz, check_fizz, check_fizzbuzz, fizzbuzz, fizzbuzzx_cli
 
 
 def test_check_fizz():
@@ -51,3 +52,11 @@ def test_fizzbuzz():
         "14",
         "fizzbuzz",
     ]
+
+
+def test_cli(capsys):
+    """Test CLI."""
+    args = ["3"]
+    fizzbuzzx_cli(args)
+    captured = capsys.readouterr()
+    assert captured.out.strip() == "['1', '2', 'fizz']"