diff --git a/MANIFEST.in b/MANIFEST.in
index 032b620f433..a119e7df1fd 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1 +1,2 @@
 prune xarray/datatree_*
+recursive-include xarray/datatree_/datatree *.py
diff --git a/pyproject.toml b/pyproject.toml
index 8cbd395b2a3..0fc26e5b82e 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -88,7 +88,7 @@ exclude_lines = ["pragma: no cover", "if TYPE_CHECKING"]
 enable_error_code = "redundant-self"
 exclude = [
   'xarray/util/generate_.*\.py',
-  'xarray/datatree_/.*\.py',
+  'xarray/datatree_/doc/.*\.py',
 ]
 files = "xarray"
 show_error_codes = true
@@ -97,11 +97,6 @@ warn_redundant_casts = true
 warn_unused_configs = true
 warn_unused_ignores = true
 
-# Ignore mypy errors for modules imported from datatree_.
-[[tool.mypy.overrides]]
-ignore_errors = true
-module = "xarray.datatree_.*"
-
 # Much of the numerical computing stack doesn't have type annotations yet.
 [[tool.mypy.overrides]]
 ignore_missing_imports = true
diff --git a/xarray/datatree_/datatree/io.py b/xarray/datatree_/datatree/io.py
index 48335ddca70..6c8e9617da3 100644
--- a/xarray/datatree_/datatree/io.py
+++ b/xarray/datatree_/datatree/io.py
@@ -3,14 +3,14 @@
 
 def _get_nc_dataset_class(engine):
     if engine == "netcdf4":
-        from netCDF4 import Dataset  # type: ignore
+        from netCDF4 import Dataset
     elif engine == "h5netcdf":
-        from h5netcdf.legacyapi import Dataset  # type: ignore
+        from h5netcdf.legacyapi import Dataset
     elif engine is None:
         try:
             from netCDF4 import Dataset
         except ImportError:
-            from h5netcdf.legacyapi import Dataset  # type: ignore
+            from h5netcdf.legacyapi import Dataset
     else:
         raise ValueError(f"unsupported engine: {engine}")
     return Dataset
@@ -78,7 +78,7 @@ def _datatree_to_netcdf(
 
 
 def _create_empty_zarr_group(store, group, mode):
-    import zarr  # type: ignore
+    import zarr
 
     root = zarr.open_group(store, mode=mode)
     root.create_group(group, overwrite=True)
@@ -92,7 +92,7 @@ def _datatree_to_zarr(
     consolidated: bool = True,
     **kwargs,
 ):
-    from zarr.convenience import consolidate_metadata  # type: ignore
+    from zarr.convenience import consolidate_metadata
 
     if kwargs.get("group", None) is not None:
         raise NotImplementedError(
diff --git a/xarray/datatree_/datatree/tests/test_extensions.py b/xarray/datatree_/datatree/tests/test_extensions.py
index fb2e82453ec..329696c7a9d 100644
--- a/xarray/datatree_/datatree/tests/test_extensions.py
+++ b/xarray/datatree_/datatree/tests/test_extensions.py
@@ -18,16 +18,15 @@ def foo(self):
                 return "bar"
 
         dt: DataTree = DataTree()
-        assert dt.demo.foo == "bar"  # type: ignore
+        assert dt.demo.foo == "bar"
 
         # accessor is cached
-        assert dt.demo is dt.demo  # type: ignore
+        assert dt.demo is dt.demo
 
         # check descriptor
-        assert dt.demo.__doc__ == "Demo accessor."  # type: ignore
-        # TODO: typing doesn't seem to work with accessors
-        assert DataTree.demo.__doc__ == "Demo accessor."  # type: ignore
-        assert isinstance(dt.demo, DemoAccessor)  # type: ignore
+        assert dt.demo.__doc__ == "Demo accessor."
+        assert DataTree.demo.__doc__ == "Demo accessor." # type: ignore
+        assert isinstance(dt.demo, DemoAccessor)
         assert DataTree.demo is DemoAccessor  # type: ignore
 
         with pytest.warns(Warning, match="overriding a preexisting attribute"):
diff --git a/xarray/datatree_/docs/source/conf.py b/xarray/datatree_/docs/source/conf.py
index 8a9224def5b..430dbb5bf6d 100644
--- a/xarray/datatree_/docs/source/conf.py
+++ b/xarray/datatree_/docs/source/conf.py
@@ -17,9 +17,9 @@
 import os
 import sys
 
-import sphinx_autosummary_accessors
+import sphinx_autosummary_accessors # type: ignore
 
-import datatree
+import datatree # type: ignore
 
 # If extensions (or modules to document with autodoc) are in another directory,
 # add these directories to sys.path here. If the directory is relative to the
@@ -286,7 +286,7 @@
 
 # -- Options for LaTeX output --------------------------------------------------
 
-latex_elements = {
+latex_elements: dict = {
     # The paper size ('letterpaper' or 'a4paper').
     # 'papersize': 'letterpaper',
     # The font size ('10pt', '11pt' or '12pt').