diff --git a/.ignore b/.ignore
new file mode 100644
index 0000000..bb71215
--- /dev/null
+++ b/.ignore
@@ -0,0 +1,11 @@
+# .ignore: control what files get searched.
+build
+htmlcov
+.tox*
+.coverage*
+_build
+_spell
+*.egg
+*.egg-info
+.mypy_cache
+.pytest_cache
diff --git a/MANIFEST.in b/MANIFEST.in
index 02c9ee5..8858bb2 100644
--- a/MANIFEST.in
+++ b/MANIFEST.in
@@ -1,4 +1,5 @@
 include .editorconfig
+include .ignore
 include .readthedocs.yaml
 include CHANGELOG.rst
 include LICENSE.txt