diff --git a/tests/test_generators.py b/tests/test_generators.py
new file mode 100644
index 0000000..d03279c
--- /dev/null
+++ b/tests/test_generators.py
@@ -0,0 +1,158 @@
+"""Tests for code generators."""
+
+import pytest
+from curlconverter.parser import parse_curl
+from curlconverter.generators import generate_code, get_supported_languages
+
+
+class TestPythonGenerator:
+    """Tests for Python code generator."""
+    
+    def test_basic_get_request(self):
+        """Test generating Python code for GET request."""
+        curl = "curl https://api.example.com/users"
+        parsed = parse_curl(curl)
+        code = generate_code(parsed, "python")
+        
+        assert "import requests" in code
+        assert "https://api.example.com/users" in code
+        assert "requests.get" in code
+    
+    def test_post_with_json(self):
+        """Test generating Python code for POST with JSON."""
+        curl = 'curl -X POST -H "Content-Type: application/json" -d \'{"name":"test"}\' https://api.example.com/users'
+        parsed = parse_curl(curl)
+        code = generate_code(parsed, "python")
+        
+        assert "requests.post" in code
+        assert "json=data" in code or "json=data" in code
+    
+    def test_basic_auth(self):
+        """Test generating Python code with basic auth."""
+        curl = "curl -u user:pass https://api.example.com"
+        parsed = parse_curl(curl)
+        code = generate_code(parsed, "python")
+        
+        assert "Authorization" in code or "requests" in code
+    
+    def test_headers(self):
+        """Test generating Python code with headers."""
+        curl = 'curl -H "Authorization: Bearer token" https://api.example.com'
+        parsed = parse_curl(curl)
+        code = generate_code(parsed, "python")
+        
+        assert "headers" in code
+
+
+class TestJavaScriptGenerator:
+    """Tests for JavaScript code generator."""
+    
+    def test_basic_get_request(self):
+        """Test generating JavaScript code for GET request."""
+        curl = "curl https://api.example.com/users"
+        parsed = parse_curl(curl)
+        code = generate_code(parsed, "javascript")
+        
+        assert "fetch" in code
+        assert "https://api.example.com/users" in code
+        assert "GET" in code
+    
+    def test_post_with_data(self):
+        """Test generating JavaScript code for POST."""
+        curl = "curl -X POST -d 'name=test' https://api.example.com/users"
+        parsed = parse_curl(curl)
+        code = generate_code(parsed, "javascript")
+        
+        assert "POST" in code
+        assert "body" in code
+
+
+class TestGoGenerator:
+    """Tests for Go code generator."""
+    
+    def test_basic_get_request(self):
+        """Test generating Go code for GET request."""
+        curl = "curl https://api.example.com/users"
+        parsed = parse_curl(curl)
+        code = generate_code(parsed, "go")
+        
+        assert "package main" in code
+        assert "net/http" in code
+        assert "https://api.example.com/users" in code
+    
+    def test_post_request(self):
+        """Test generating Go code for POST."""
+        curl = "curl -X POST -d 'name=test' https://api.example.com/users"
+        parsed = parse_curl(curl)
+        code = generate_code(parsed, "go")
+        
+        assert "POST" in code
+        assert "bytes.NewBuffer" in code
+
+
+class TestRubyGenerator:
+    """Tests for Ruby code generator."""
+    
+    def test_basic_get_request(self):
+        """Test generating Ruby code for GET request."""
+        curl = "curl https://api.example.com/users"
+        parsed = parse_curl(curl)
+        code = generate_code(parsed, "ruby")
+        
+        assert "require 'net/http'" in code
+        assert "Net::HTTP::Get" in code
+        assert "https://api.example.com/users" in code
+    
+    def test_post_request(self):
+        """Test generating Ruby code for POST."""
+        curl = "curl -X POST -d 'name=test' https://api.example.com/users"
+        parsed = parse_curl(curl)
+        code = generate_code(parsed, "ruby")
+        
+        assert "Net::HTTP::Post" in code
+
+
+class TestPHPGenerator:
+    """Tests for PHP code generator."""
+    
+    def test_basic_get_request(self):
+        """Test generating PHP code for GET request."""
+        curl = "curl https://api.example.com/users"
+        parsed = parse_curl(curl)
+        code = generate_code(parsed, "php")
+        
+        assert "<?php" in code
+        assert "curl_init" in code
+        assert "https://api.example.com/users" in code
+    
+    def test_post_request(self):
+        """Test generating PHP code for POST."""
+        curl = "curl -X POST -d 'name=test' https://api.example.com/users"
+        parsed = parse_curl(curl)
+        code = generate_code(parsed, "php")
+        
+        assert "CURLOPT_POST" in code or "CUSTOMREQUEST" in code
+
+
+class TestSupportedLanguages:
+    """Tests for supported languages."""
+    
+    def test_get_supported_languages(self):
+        """Test getting list of supported languages."""
+        languages = get_supported_languages()
+        
+        assert "python" in languages
+        assert "javascript" in languages
+        assert "go" in languages
+        assert "ruby" in languages
+        assert "php" in languages
+    
+    def test_unsupported_language_raises_error(self):
+        """Test that unsupported language raises ValueError."""
+        curl = "curl https://example.com"
+        parsed = parse_curl(curl)
+        
+        with pytest.raises(ValueError) as exc_info:
+            generate_code(parsed, "unsupported_lang")
+        
+        assert "Unsupported language" in str(exc_info.value)