diff --git a/Makefile b/Makefile
index 5c1ece0..283bff7 100644
--- a/Makefile
+++ b/Makefile
@@ -24,7 +24,7 @@ clean: ## remove generated byte code, coverage reports, and build artifacts
 	find . -name '*.pyc' -exec rm -f {} +
 	find . -name '*.pyo' -exec rm -f {} +
 	find . -name '*~' -exec rm -f {} +
-	coverage erase
+	-coverage erase
 	rm -fr coverage.json
 	rm -fr build/
 	rm -fr dist/