diff --git a/MANIFEST.in b/MANIFEST.in
index d74bc04de..ba34af210 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1,4 +1,4 @@
 include COPYING AUTHORS CHANGELOG.md requirements*.txt
-include tox.ini
+include tox.ini gitlab/py.typed
 recursive-include tests *
 recursive-include docs *j2 *.js *.md *.py *.rst api/*.rst Makefile make.bat
diff --git a/tests/smoke/test_dists.py b/tests/smoke/test_dists.py
index aa58b91b5..58ede1224 100644
--- a/tests/smoke/test_dists.py
+++ b/tests/smoke/test_dists.py
@@ -12,6 +12,7 @@
 TEST_DIR = "tests"
 SDIST_FILE = f"{__title__}-{__version__}.tar.gz"
 WHEEL_FILE = f"{__title__.replace('-', '_')}-{__version__}-py{sys.version_info.major}-none-any.whl"
+PY_TYPED = "gitlab/py.typed"
 
 
 @pytest.fixture(scope="session")
@@ -21,19 +22,26 @@ def build(tmp_path_factory: pytest.TempPathFactory):
     return temp_dir
 
 
-def test_sdist_includes_docs_and_tests(build: Path) -> None:
+def test_sdist_includes_correct_files(build: Path) -> None:
     sdist = tarfile.open(build / SDIST_FILE, "r:gz")
     sdist_dir = f"{__title__}-{__version__}"
 
     docs_dir = sdist.getmember(f"{sdist_dir}/{DOCS_DIR}")
     test_dir = sdist.getmember(f"{sdist_dir}/{TEST_DIR}")
     readme = sdist.getmember(f"{sdist_dir}/README.rst")
+    py_typed = sdist.getmember(f"{sdist_dir}/{PY_TYPED}")
 
     assert docs_dir.isdir()
     assert test_dir.isdir()
+    assert py_typed.isfile()
     assert readme.isfile()
 
 
+def test_wheel_includes_correct_files(build: Path) -> None:
+    wheel = zipfile.ZipFile(build / WHEEL_FILE)
+    assert PY_TYPED in wheel.namelist()
+
+
 def test_wheel_excludes_docs_and_tests(build: Path) -> None:
     wheel = zipfile.ZipFile(build / WHEEL_FILE)
     assert not any(file.startswith((DOCS_DIR, TEST_DIR)) for file in wheel.namelist())