diff --git a/tests/core/test_header.py b/tests/core/test_header.py
new file mode 100644
index 0000000..2f38d49
--- /dev/null
+++ b/tests/core/test_header.py
@@ -0,0 +1,25 @@
+from app.core.header import RxHeader
+import reflex as rx
+import pytest
+
+
+@pytest.fixture
+def build():
+    return RxHeader().build()
+
+
+@pytest.fixture
+def header():
+    return RxHeader()
+
+
+def test_header_type(build, header):
+    assert isinstance(build, rx.Component)
+    assert isinstance(header.theme_toggle, rx.Tooltip)
+    assert isinstance(header.rx_header, rx.Hstack)
+    assert isinstance(header.site_name, rx.Link)
+
+
+def test_header_background_color(header):
+    header.rx_header.__dict__["style"]["bg"] = "orange"
+    assert header.rx_header.__dict__["style"]["bg"] == "orange"