diff --git a/fastapi_startkit/tests/vite/__init__.py b/fastapi_startkit/tests/vite/__init__.py
new file mode 100644
index 00000000..e69de29b
diff --git a/fastapi_startkit/tests/vite/test_vite.py b/fastapi_startkit/tests/vite/test_vite.py
new file mode 100644
index 00000000..b7cb6a11
--- /dev/null
+++ b/fastapi_startkit/tests/vite/test_vite.py
@@ -0,0 +1,300 @@
+import json
+
+import pytest
+
+from fastapi_startkit.vite.exceptions import ViteException, ViteManifestNotFoundException
+from fastapi_startkit.vite.vite import Vite
+
+
+# ---------------------------------------------------------------------------
+# Helpers
+# ---------------------------------------------------------------------------
+
+
+def make_vite(tmp_path, build_dir="build", manifest=None, hot_content=None, asset_url=""):
+    """Create a Vite instance with an optional manifest.json and/or hot file."""
+    public = tmp_path / "public"
+    public.mkdir()
+
+    if manifest is not None:
+        build = public / build_dir
+        build.mkdir(parents=True)
+        (build / "manifest.json").write_text(json.dumps(manifest))
+
+    if hot_content is not None:
+        (public / "hot").write_text(hot_content)
+
+    # Clear class-level manifest cache between tests
+    Vite._manifests.clear()
+
+    return Vite(public_path=str(public), build_directory=build_dir, asset_url=asset_url)
+
+
+SIMPLE_MANIFEST = {
+    "resources/js/app.js": {
+        "file": "assets/app-abc123.js",
+        "src": "resources/js/app.js",
+        "isEntry": True,
+    }
+}
+
+MANIFEST_WITH_CSS = {
+    "resources/js/app.js": {
+        "file": "assets/app-abc123.js",
+        "src": "resources/js/app.js",
+        "isEntry": True,
+        "css": ["assets/app-def456.css"],
+    }
+}
+
+
+# ---------------------------------------------------------------------------
+# Production mode (no hot file)
+# ---------------------------------------------------------------------------
+
+
+class TestProductionMode:
+    def test_is_not_running_hot_without_hot_file(self, tmp_path):
+        vite = make_vite(tmp_path, manifest=SIMPLE_MANIFEST)
+        assert vite.is_running_hot() is False
+
+    def test_asset_url_contains_hashed_filename(self, tmp_path):
+        vite = make_vite(tmp_path, manifest=SIMPLE_MANIFEST)
+        result = vite("resources/js/app.js")
+        assert "app-abc123.js" in result
+
+    def test_script_tag_generated(self, tmp_path):
+        vite = make_vite(tmp_path, manifest=SIMPLE_MANIFEST)
+        result = vite("resources/js/app.js")
+        assert "<script" in result
+        assert 'type="module"' in result
+
+    def test_css_link_tag_generated(self, tmp_path):
+        vite = make_vite(tmp_path, manifest=MANIFEST_WITH_CSS)
+        result = vite("resources/js/app.js")
+        assert "<link" in result
+        assert "app-def456.css" in result
+
+    def test_asset_method_returns_hashed_url(self, tmp_path):
+        manifest = {
+            "resources/images/logo.png": {
+                "file": "assets/logo-xyz789.png",
+                "src": "resources/images/logo.png",
+            }
+        }
+        vite = make_vite(tmp_path, manifest=manifest)
+        url = vite.asset("resources/images/logo.png")
+        assert "logo-xyz789.png" in url
+
+    def test_asset_url_prefix_applied(self, tmp_path):
+        vite = make_vite(tmp_path, manifest=SIMPLE_MANIFEST, asset_url="https://cdn.example.com")
+        result = vite("resources/js/app.js")
+        assert "cdn.example.com" in result
+
+    def test_multiple_entry_points(self, tmp_path):
+        manifest = {
+            "resources/js/app.js": {
+                "file": "assets/app-abc.js",
+                "src": "resources/js/app.js",
+                "isEntry": True,
+            },
+            "resources/js/admin.js": {
+                "file": "assets/admin-def.js",
+                "src": "resources/js/admin.js",
+                "isEntry": True,
+            },
+        }
+        vite = make_vite(tmp_path, manifest=manifest)
+        result = vite(["resources/js/app.js", "resources/js/admin.js"])
+        assert "app-abc.js" in result
+        assert "admin-def.js" in result
+
+
+# ---------------------------------------------------------------------------
+# Dev mode (HMR / hot file present)
+# ---------------------------------------------------------------------------
+
+
+class TestDevMode:
+    def test_is_running_hot_with_hot_file(self, tmp_path):
+        vite = make_vite(tmp_path, hot_content="http://localhost:5173")
+        assert vite.is_running_hot() is True
+
+    def test_dev_url_contains_localhost(self, tmp_path):
+        vite = make_vite(tmp_path, hot_content="http://localhost:5173")
+        result = vite("resources/js/app.js")
+        assert "localhost:5173" in result
+
+    def test_dev_url_contains_vite_client(self, tmp_path):
+        vite = make_vite(tmp_path, hot_content="http://localhost:5173")
+        result = vite("resources/js/app.js")
+        assert "@vite/client" in result
+
+    def test_dev_url_entrypoint_included(self, tmp_path):
+        vite = make_vite(tmp_path, hot_content="http://localhost:5173")
+        result = vite("resources/js/app.js")
+        assert "resources/js/app.js" in result
+
+    def test_custom_hot_origin_used(self, tmp_path):
+        vite = make_vite(tmp_path, hot_content="http://localhost:3000")
+        result = vite("resources/js/app.js")
+        assert "localhost:3000" in result
+
+    def test_asset_in_hot_mode_uses_dev_server(self, tmp_path):
+        vite = make_vite(tmp_path, hot_content="http://localhost:5173")
+        url = vite.asset("resources/images/logo.png")
+        assert "localhost:5173" in url
+
+    def test_react_refresh_returned_in_dev_mode(self, tmp_path):
+        vite = make_vite(tmp_path, hot_content="http://localhost:5173")
+        result = vite.react_refresh()
+        assert "@react-refresh" in result
+        assert "<script" in result
+
+    def test_react_refresh_empty_in_production(self, tmp_path):
+        vite = make_vite(tmp_path, manifest=SIMPLE_MANIFEST)
+        assert vite.react_refresh() == ""
+
+
+# ---------------------------------------------------------------------------
+# Missing manifest — error with helpful message
+# ---------------------------------------------------------------------------
+
+
+class TestMissingManifest:
+    def test_missing_manifest_raises_exception(self, tmp_path):
+        vite = make_vite(tmp_path)  # no manifest written
+        with pytest.raises(ViteManifestNotFoundException) as exc_info:
+            vite("resources/js/app.js")
+        assert "manifest" in str(exc_info.value).lower()
+
+    def test_missing_manifest_message_contains_path(self, tmp_path):
+        vite = make_vite(tmp_path)
+        with pytest.raises(ViteManifestNotFoundException) as exc_info:
+            vite("resources/js/app.js")
+        assert "manifest.json" in str(exc_info.value)
+
+    def test_unknown_entrypoint_raises_vite_exception(self, tmp_path):
+        vite = make_vite(tmp_path, manifest=SIMPLE_MANIFEST)
+        with pytest.raises(ViteException):
+            vite("resources/js/nonexistent.js")
+
+    def test_manifest_hash_returns_none_when_missing(self, tmp_path):
+        vite = make_vite(tmp_path)
+        assert vite.manifest_hash() is None
+
+
+# ---------------------------------------------------------------------------
+# manifest_hash
+# ---------------------------------------------------------------------------
+
+
+class TestManifestHash:
+    def test_manifest_hash_returns_string_in_production(self, tmp_path):
+        vite = make_vite(tmp_path, manifest=SIMPLE_MANIFEST)
+        h = vite.manifest_hash()
+        assert h is not None
+        assert isinstance(h, str)
+        assert len(h) == 32  # MD5 hex
+
+    def test_manifest_hash_is_none_in_hot_mode(self, tmp_path):
+        vite = make_vite(tmp_path, hot_content="http://localhost:5173")
+        assert vite.manifest_hash() is None
+
+    def test_manifest_hash_changes_when_manifest_changes(self, tmp_path):
+        vite1 = make_vite(tmp_path, manifest=SIMPLE_MANIFEST)
+        h1 = vite1.manifest_hash()
+
+        Vite._manifests.clear()
+
+        manifest2 = {
+            "resources/js/app.js": {
+                "file": "assets/app-different.js",
+                "src": "resources/js/app.js",
+                "isEntry": True,
+            }
+        }
+        public = tmp_path / "public"
+        (public / "build" / "manifest.json").write_text(json.dumps(manifest2))
+
+        vite2 = Vite(public_path=str(public), build_directory="build")
+        h2 = vite2.manifest_hash()
+
+        assert h1 != h2
+
+
+# ---------------------------------------------------------------------------
+# ViteProvider — registers Vite service in the container
+# ---------------------------------------------------------------------------
+
+
+class TestViteProvider:
+    def test_vite_provider_binds_vite_to_container(self, tmp_path):
+        from fastapi_startkit.application import Application
+        from fastapi_startkit.vite.providers.provider import ViteProvider
+
+        app = Application(base_path=tmp_path, env="testing", providers=[ViteProvider])
+
+        assert app.has("vite")
+        vite = app.make("vite")
+        assert isinstance(vite, Vite)
+
+
+# ---------------------------------------------------------------------------
+# Configuration: is_css_path helper
+# ---------------------------------------------------------------------------
+
+
+class TestIsCssPath:
+    def test_css_extension_is_css(self, tmp_path):
+        vite = make_vite(tmp_path, manifest=SIMPLE_MANIFEST)
+        assert vite._is_css_path("style.css") is True
+
+    def test_scss_extension_is_css(self, tmp_path):
+        vite = make_vite(tmp_path, manifest=SIMPLE_MANIFEST)
+        assert vite._is_css_path("style.scss") is True
+
+    def test_js_extension_is_not_css(self, tmp_path):
+        vite = make_vite(tmp_path, manifest=SIMPLE_MANIFEST)
+        assert vite._is_css_path("app.js") is False
+
+    def test_ts_extension_is_not_css(self, tmp_path):
+        vite = make_vite(tmp_path, manifest=SIMPLE_MANIFEST)
+        assert vite._is_css_path("app.ts") is False
+
+
+# ---------------------------------------------------------------------------
+# CSP Nonce
+# ---------------------------------------------------------------------------
+
+
+class TestCspNonce:
+    def test_use_csp_nonce_generates_random_nonce(self, tmp_path):
+        vite = make_vite(tmp_path, manifest=SIMPLE_MANIFEST)
+        nonce = vite.use_csp_nonce()
+        assert isinstance(nonce, str)
+        assert len(nonce) == 40  # secrets.token_hex(20)
+
+    def test_use_csp_nonce_accepts_explicit_value(self, tmp_path):
+        vite = make_vite(tmp_path, manifest=SIMPLE_MANIFEST)
+        vite.use_csp_nonce("my-nonce-value")
+        assert vite.csp_nonce() == "my-nonce-value"
+
+    def test_nonce_included_in_script_tag(self, tmp_path):
+        vite = make_vite(tmp_path, manifest=SIMPLE_MANIFEST)
+        vite.use_csp_nonce("testnonce")
+        result = vite("resources/js/app.js")
+        assert "testnonce" in result
+
+
+# ---------------------------------------------------------------------------
+# Flush and preloaded_assets
+# ---------------------------------------------------------------------------
+
+
+class TestFlush:
+    def test_flush_clears_preloaded_assets(self, tmp_path):
+        vite = make_vite(tmp_path, manifest=SIMPLE_MANIFEST)
+        vite("resources/js/app.js")
+        vite.flush()
+        assert vite.preloaded_assets() == {}