diff --git a/MANIFEST.in b/MANIFEST.in
index f8cfd680..abc347be 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -4,4 +4,5 @@ include MANIFEST.in
 include NEWS
 include README.rst
 include .gitignore
+recursive-include doc *.rst *.py
 prune doc/_build
diff --git a/pyproject.toml b/pyproject.toml
index 00783e32..a0f5cec3 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -49,6 +49,10 @@ version = {version!r}
 __version__ = {version_tuple!r}
 """
 
+[tool.hatch.build.targets.wheel]
+# testtools is not zip safe due to dynamic imports and resource loading
+only-include = ["testtools"]
+
 [tool.mypy]
 warn_redundant_casts = true
 warn_unused_configs = true