diff --git a/tests/test_router.py b/tests/test_router.py
new file mode 100644
index 0000000..fb18b9b
--- /dev/null
+++ b/tests/test_router.py
@@ -0,0 +1,83 @@
+import pytest
+from src.core.router import Router
+from src.models.endpoint import Endpoint
+
+
+class TestRouter:
+    def setup_method(self):
+        self.router = Router()
+
+    def test_add_route_simple(self):
+        endpoint = Endpoint(
+            path="/api/users",
+            method="GET",
+            response={"status_code": 200, "body": {"users": []}}
+        )
+        self.router.add_route(endpoint)
+        routes = self.router.get_all_routes()
+        assert len(routes) == 1
+        assert routes[0].path == "/api/users"
+
+    def test_match_simple_path(self):
+        endpoint = Endpoint(
+            path="/api/hello",
+            method="GET",
+            response={"status_code": 200, "body": {"message": "Hello"}}
+        )
+        self.router.add_route(endpoint)
+        result = self.router.match("/api/hello", "GET")
+        assert result is not None
+        endpoint_result, params = result
+        assert endpoint_result.path == "/api/hello"
+        assert params == {}
+
+    def test_match_with_path_params(self):
+        endpoint = Endpoint(
+            path="/api/users/{id}",
+            method="GET",
+            response={"status_code": 200, "body": {}}
+        )
+        self.router.add_route(endpoint)
+        result = self.router.match("/api/users/123", "GET")
+        assert result is not None
+        endpoint_result, params = result
+        assert params["id"] == "123"
+
+    def test_match_method_mismatch(self):
+        endpoint = Endpoint(
+            path="/api/users",
+            method="GET",
+            response={"status_code": 200, "body": {}}
+        )
+        self.router.add_route(endpoint)
+        result = self.router.match("/api/users", "POST")
+        assert result is None
+
+    def test_match_nonexistent_path(self):
+        result = self.router.match("/api/nonexistent", "GET")
+        assert result is None
+
+    def test_clear_routes(self):
+        endpoint = Endpoint(
+            path="/api/test",
+            method="GET",
+            response={"status_code": 200, "body": {}}
+        )
+        self.router.add_route(endpoint)
+        self.router.clear()
+        routes = self.router.get_all_routes()
+        assert len(routes) == 0
+
+    def test_multiple_routes(self):
+        endpoints = [
+            Endpoint(path="/api/users", method="GET", response={}),
+            Endpoint(path="/api/users/{id}", method="GET", response={}),
+            Endpoint(path="/api/posts", method="POST", response={}),
+        ]
+        for ep in endpoints:
+            self.router.add_route(ep)
+        assert len(self.router.get_all_routes()) == 3
+        assert self.router.match("/api/users", "GET") is not None
+        assert self.router.match("/api/users/123", "GET") is not None
+        assert self.router.match("/api/posts", "POST") is not None
+        assert self.router.match("/api/posts", "GET") is None