diff --git a/tests/test_config.py b/tests/test_config.py
new file mode 100644
index 0000000..786ac8c
--- /dev/null
+++ b/tests/test_config.py
@@ -0,0 +1,37 @@
+import tempfile
+
+from patternforge.config import Config
+
+
+class TestConfig:
+    def test_default_initialization(self) -> None:
+        config = Config()
+        assert config.patterns_dir.exists()
+        assert config.templates_dir.exists()
+
+    def test_load_from_file(self) -> None:
+        with tempfile.NamedTemporaryFile(mode="w", suffix=".yaml", delete=False) as f:
+            f.write("language: python\nindent_size: 2\n")
+            f.flush()
+            config = Config.load(f.name)
+            assert config.get("language") == "python"
+            assert config.get("indent_size") == 2
+
+    def test_set_and_get(self) -> None:
+        config = Config()
+        config.set("test_key", "test_value")
+        assert config.get("test_key") == "test_value"
+
+    def test_to_dict(self) -> None:
+        config = Config()
+        data = config.to_dict()
+        assert "patterns_dir" in data
+        assert "templates_dir" in data
+
+    def test_save(self) -> None:
+        with tempfile.TemporaryDirectory() as tmpdir:
+            config = Config()
+            config.set("custom_setting", "value")
+            config.save(f"{tmpdir}/config.yaml")
+            new_config = Config.load(f"{tmpdir}/config.yaml")
+            assert new_config.get("custom_setting") == "value"