diff --git a/tests/test_request.py b/tests/test_request.py
new file mode 100644
index 0000000..33b82bb
--- /dev/null
+++ b/tests/test_request.py
@@ -0,0 +1,29 @@
+import pytest
+import yarl
+
+
+@pytest.mark.parametrize(
+    "base, relative, actual",
+    (
+        ("http://service.com", "hello", "http://service.com/hello"),
+        ("http://service.com/", "hello", "http://service.com/hello"),
+        ("http://service.com", "api/hello", "http://service.com/api/hello"),
+        ("http://service.com/", "api/hello", "http://service.com/api/hello"),
+        ("http://service.com", "hello", "http://service.com/hello"),
+        ("http://service.com/", "hello", "http://service.com/hello"),
+        ("http://service.com", "api/hello", "http://service.com/api/hello"),
+        ("http://service.com/", "api/hello", "http://service.com/api/hello"),
+        ("https://service.com", "hello", "https://service.com/hello"),
+        ("https://service.com/", "hello", "https://service.com/hello"),
+        ("https://service.com", "api/hello", "https://service.com/api/hello"),
+        ("https://service.com/", "api/hello", "https://service.com/api/hello"),
+        ("https://service.com:12345", "hello", "https://service.com:12345/hello"),
+        ("https://service.com:12345/", "hello", "https://service.com:12345/hello"),
+        ("https://service.com:12345", "api/hello", "https://service.com:12345/api/hello"),
+        ("https://service.com:12345/", "api/hello", "https://service.com:12345/api/hello"),
+    ),
+)
+async def test_absolute(base: str, relative: str, actual) -> None:
+    expected = yarl.URL(base).join(yarl.URL(relative))
+    assert expected == yarl.URL(actual)
+    assert expected.raw_path.startswith("/")