diff --git a/tests/test_api.py b/tests/test_api.py
new file mode 100644
index 0000000..1d83b7a
--- /dev/null
+++ b/tests/test_api.py
@@ -0,0 +1,17 @@
+from trakt.api import HttpClient
+from trakt.core import api
+from trakt.tv import TVShow
+
+
+def test_api_singleton():
+    """Test that api() returns the same HttpClient instance when called multiple times."""
+    api1 = api()
+    api2 = api()
+    assert isinstance(api1, HttpClient), "api() should return an HttpClient instance"
+    assert api1 == api2, "Multiple calls to api() should return the same instance"
+
+
+def test_tvshow_properties():
+    show = TVShow("Game of Thrones")
+    assert show.title == "Game of Thrones"
+    assert show.certification == "TV-MA"