diff --git a/.flake8 b/.flake8
index 5c86e2d..a98c929 100644
--- a/.flake8
+++ b/.flake8
@@ -2,4 +2,4 @@
 max-line-length = 88
 extend-ignore = E203
 per-file-ignores=
-    test_dj_database_url.py: E501, E265
+    tests/test_dj_database_url.py: E501, E265
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 91d002e..85cd03b 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -37,13 +37,19 @@ jobs:
 
       - name: Run mypy
         run: |
-          python -m mypy dj_database_url.py
+          python -m mypy dj_database_url
 
       - name: Run Tests
         run: |
           echo "$(python --version) / Django $(django-admin --version)"
-          coverage run --source=dj_database_url --branch -m unittest discover
+          coverage run --source=dj_database_url --branch -m unittest discover -v
           coverage report
           coverage xml
 
       - uses: codecov/codecov-action@v3
+
+      - name: Check mypy types installation
+        run: |
+          pip install .
+          cd tests
+          python -m mypy .
diff --git a/MANIFEST.in b/MANIFEST.in
deleted file mode 100644
index 13c250a..0000000
--- a/MANIFEST.in
+++ /dev/null
@@ -1 +0,0 @@
-include py.typed
diff --git a/dj_database_url.py b/dj_database_url/__init__.py
similarity index 100%
rename from dj_database_url.py
rename to dj_database_url/__init__.py
diff --git a/py.typed b/dj_database_url/py.typed
similarity index 100%
rename from py.typed
rename to dj_database_url/py.typed
diff --git a/setup.py b/setup.py
index 6ad3673..e967a7c 100644
--- a/setup.py
+++ b/setup.py
@@ -13,10 +13,12 @@ setup(
     description="Use Database URLs in your Django Application.",
     long_description=readme,
     long_description_content_type="text/x-rst",
-    py_modules=["dj_database_url"],
+    packages=["dj_database_url"],
     install_requires=["Django>=3.2", "typing_extensions >= 3.10.0.0"],
-    zip_safe=False,
     include_package_data=True,
+    package_data={
+        "dj_database_url": ["py.typed"],
+    },
     platforms="any",
     project_urls={
         "GitHub": "https://github.com/jazzband/dj-database-url/",
diff --git a/tests/__init__.py b/tests/__init__.py
new file mode 100644
index 0000000..e69de29
diff --git a/test_dj_database_url.py b/tests/test_dj_database_url.py
similarity index 100%
rename from test_dj_database_url.py
rename to tests/test_dj_database_url.py