diff --git a/tests/test_0.py b/tests/test_0.py
new file mode 100644
index 0000000..62fe2de
--- /dev/null
+++ b/tests/test_0.py
@@ -0,0 +1,52 @@
+import pytest
+import socket
+from unittest.mock import patch, MagicMock
+from test_proxy import check_open_ports, get_ssl_info, check_http_headers, detect_proxy
+
+# Mock host to use in tests
+MOCK_HOST = 'example.com'
+
+def test_check_open_ports():
+    ports = [80, 443, 8080]
+    # Assuming the ports are closed, we expect an empty list in return
+    with patch('socket.create_connection', side_effect=socket.timeout):
+        open_ports = check_open_ports(MOCK_HOST, ports)
+        assert open_ports == []
+
+def test_get_ssl_info():
+    # Mock the SSL socket and cert data
+    mock_cert = {
+        'subject': ((('commonName', 'example.com'),),),
+        'issuer': ((('countryName', 'US'),), (('organizationName', 'DigiCert Inc'),), (('commonName', 'DigiCert SHA2 Secure Server CA'),)),
+        'version': 3
+    }
+    
+    with patch('ssl.create_default_context'), \
+         patch('socket.create_connection', MagicMock()), \
+         patch('ssl.SSLSocket.getpeercert', return_value=mock_cert):
+        
+        ssl_info = get_ssl_info(MOCK_HOST)
+        assert ssl_info['subject'] == ((('commonName', 'example.com'),),)
+
+def test_check_http_headers():
+    mock_headers = {
+        'Server': 'Apache',
+        'Content-Type': 'text/html; charset=UTF-8'
+    }
+    
+    with patch('requests.head') as mock_request:
+        mock_response = MagicMock()
+        mock_response.headers = mock_headers
+        mock_request.return_value = mock_response
+        
+        headers = check_http_headers(f'http://{MOCK_HOST}')
+        assert headers == mock_headers
+
+def test_detect_proxy():
+    # Mock detect_proxy by just checking for open ports and headers
+    with patch('socket.gethostbyname', return_value='93.184.216.34'), \
+         patch('test_proxy.check_open_ports', return_value=[80, 443]), \
+         patch('test_proxy.get_ssl_info', return_value=None), \
+         patch('test_proxy.check_http_headers', return_value=None):
+        
+        detect_proxy(MOCK_HOST)  # We only want to make sure the function runs without exceptions