diff --git a/tests/unit/test_generators.py b/tests/unit/test_generators.py
new file mode 100644
index 0000000..6181c4e
--- /dev/null
+++ b/tests/unit/test_generators.py
@@ -0,0 +1,223 @@
+"""Unit tests for the generator modules."""
+import pytest
+import tempfile
+import os
+from pathlib import Path
+
+from api_testgen.core import SpecParser
+from api_testgen.generators import PytestGenerator, JestGenerator, GoGenerator
+from api_testgen.mocks import MockServerGenerator
+
+
+class TestPytestGenerator:
+    """Tests for PytestGenerator class."""
+
+    @pytest.fixture
+    def parser(self, sample_openapi_spec):
+        """Create a spec parser with sample spec."""
+        with tempfile.NamedTemporaryFile(mode='w', suffix='.yaml', delete=False) as f:
+            import yaml
+            yaml.dump(sample_openapi_spec, f)
+            parser = SpecParser(Path(f.name))
+            parser.load()
+            return parser
+
+    def test_generate_creates_file(self, parser, tmp_path):
+        """Test that generate creates a test file."""
+        generator = PytestGenerator(parser, output_dir=str(tmp_path))
+        files = generator.generate()
+
+        assert len(files) == 1
+        assert files[0].exists()
+        assert files[0].suffix == ".py"
+
+    def test_generate_content_contains_tests(self, parser, tmp_path):
+        """Test that generated file contains test functions."""
+        generator = PytestGenerator(parser, output_dir=str(tmp_path))
+        files = generator.generate()
+
+        content = files[0].read_text()
+
+        assert "test_" in content
+        assert "BASE_URL" in content
+        assert "def test_" in content
+
+    def test_generate_with_custom_output_file(self, parser, tmp_path):
+        """Test generating to a specific file path."""
+        generator = PytestGenerator(parser, output_dir=str(tmp_path))
+        files = generator.generate(output_file=str(tmp_path / "custom_test.py"))
+
+        assert len(files) == 1
+        assert files[0].name == "custom_test.py"
+
+    def test_generate_endpoint_test(self, parser):
+        """Test generating a single endpoint test."""
+        generator = PytestGenerator(parser)
+
+        test_code = generator.generate_endpoint_tests("/pets", "get")
+
+        assert "test_" in test_code
+        assert "requests.get" in test_code
+
+    def test_generate_test_name(self, parser):
+        """Test test name generation."""
+        generator = PytestGenerator(parser)
+
+        name = generator._generate_test_name({{
+            "path": "/pets",
+            "method": "get",
+            "summary": "List all pets",
+        }})
+
+        assert name == "get_pets" or "pets" in name
+
+
+class TestJestGenerator:
+    """Tests for JestGenerator class."""
+
+    @pytest.fixture
+    def parser(self, sample_openapi_spec):
+        """Create a spec parser with sample spec."""
+        with tempfile.NamedTemporaryFile(mode='w', suffix='.yaml', delete=False) as f:
+            import yaml
+            yaml.dump(sample_openapi_spec, f)
+            parser = SpecParser(Path(f.name))
+            parser.load()
+            return parser
+
+    def test_generate_creates_file(self, parser, tmp_path):
+        """Test that generate creates a test file."""
+        generator = JestGenerator(parser, output_dir=str(tmp_path))
+        files = generator.generate()
+
+        assert len(files) == 1
+        assert files[0].exists()
+        assert files[0].suffix == ".js"
+
+    def test_generate_content_contains_describe(self, parser, tmp_path):
+        """Test that generated file contains describe blocks."""
+        generator = JestGenerator(parser, output_dir=str(tmp_path))
+        files = generator.generate()
+
+        content = files[0].read_text()
+
+        assert "describe" in content
+        expect_in = "expect" in content or "toContain" in content or "toBe" in content
+        assert expect_in
+
+    def test_generate_endpoint_test(self, parser):
+        """Test generating a single endpoint test."""
+        generator = JestGenerator(parser)
+
+        test_code = generator.generate_endpoint_tests("/pets", "get")
+
+        assert "describe" in test_code or "it(" in test_code
+
+
+class TestGoGenerator:
+    """Tests for GoGenerator class."""
+
+    @pytest.fixture
+    def parser(self, sample_openapi_spec):
+        """Create a spec parser with sample spec."""
+        with tempfile.NamedTemporaryFile(mode='w', suffix='.yaml', delete=False) as f:
+            import yaml
+            yaml.dump(sample_openapi_spec, f)
+            parser = SpecParser(Path(f.name))
+            parser.load()
+            return parser
+
+    def test_generate_creates_file(self, parser, tmp_path):
+        """Test that generate creates a test file."""
+        generator = GoGenerator(parser, output_dir=str(tmp_path))
+        files = generator.generate()
+
+        assert len(files) == 1
+        assert files[0].exists()
+        assert files[0].name.endswith("_test.go")
+
+    def test_generate_content_contains_tests(self, parser, tmp_path):
+        """Test that generated file contains test functions."""
+        generator = GoGenerator(parser, output_dir=str(tmp_path))
+        files = generator.generate()
+
+        content = files[0].read_text()
+
+        assert "func Test" in content
+        assert "http.Client" in content or "http.NewRequest" in content
+
+    def test_generate_with_custom_package(self, parser, tmp_path):
+        """Test generating with custom package name."""
+        generator = GoGenerator(parser, output_dir=str(tmp_path), package_name="custompkg")
+        files = generator.generate()
+
+        content = files[0].read_text()
+
+        assert "package custompkg" in content
+
+
+class TestMockServerGenerator:
+    """Tests for MockServerGenerator class."""
+
+    @pytest.fixture
+    def parser(self, sample_openapi_spec):
+        """Create a spec parser with sample spec."""
+        with tempfile.NamedTemporaryFile(mode='w', suffix='.yaml', delete=False) as f:
+            import yaml
+            yaml.dump(sample_openapi_spec, f)
+            parser = SpecParser(Path(f.name))
+            parser.load()
+            return parser
+
+    def test_generate_prism_config(self, parser, tmp_path):
+        """Test generating Prism configuration."""
+        generator = MockServerGenerator(parser, output_dir=str(tmp_path))
+        file = generator.generate_prism_config()
+
+        assert file.exists()
+        assert file.name == "prism-config.json"
+
+        content = file.read_text()
+        import json
+        config = json.loads(content)
+
+        assert "mock" in config
+        assert "port" in config["mock"]
+
+    def test_generate_docker_compose(self, parser, tmp_path):
+        """Test generating Docker Compose configuration."""
+        generator = MockServerGenerator(parser, output_dir=str(tmp_path))
+        file = generator.generate_docker_compose()
+
+        assert file.exists()
+        assert file.name == "docker-compose.yml"
+
+        content = file.read_text()
+
+        assert "services" in content
+        assert "mock-server" in content
+
+    def test_generate_dockerfile(self, parser, tmp_path):
+        """Test generating Dockerfile."""
+        generator = MockServerGenerator(parser, output_dir=str(tmp_path))
+        file = generator.generate_dockerfile()
+
+        assert file.exists()
+        assert file.name == "Dockerfile"
+
+        content = file.read_text()
+
+        assert "FROM" in content
+        assert "prism" in content.lower()
+
+    def test_generate_all(self, parser, tmp_path):
+        """Test generating all mock server files."""
+        generator = MockServerGenerator(parser, output_dir=str(tmp_path))
+        files = generator.generate()
+
+        assert len(files) == 3
+
+        file_names = [f.name for f in files]
+        assert "prism-config.json" in file_names
+        assert "docker-compose.yml" in file_names
+        assert "Dockerfile" in file_names