diff --git a/Makefile b/Makefile
index 9410d21..045802e 100644
--- a/Makefile
+++ b/Makefile
@@ -1,6 +1,6 @@
 .PHONY: test format clean serve_docs
 test:
-	python3 -m pytest --cov
+	python3 -m pytest --cov-report json
 
 format:
 	python3 -m black .