2 files changed, 2 insertions, 1 deletions

diff --git a/.treerc b/.treerc
index a2188587..74a2a395 100644
--- a/.treerc
+++ b/.treerc
@@ -14,3 +14,4 @@ ignore =
     *.gz *.zip
     _build _spell
     *.egg *.egg-info
+    .mypy_cache
diff --git a/Makefile b/Makefile
index 0032a3dd..541aeeca 100644
--- a/Makefile
+++ b/Makefile
@@ -28,7 +28,7 @@ clean: clean_platform                   ## Remove artifacts of test execution, i
 	@rm -f tests/covmain.zip tests/zipmods.zip tests/zip1.zip
 	@rm -rf doc/_build doc/_spell doc/sample_html_beta
 	@rm -rf tmp
-	@rm -rf .cache .pytest_cache .hypothesis
+	@rm -rf .cache .hypothesis .mypy_cache .pytest_cache
 	@rm -rf tests/actual
 	@-make -C tests/gold/html clean