diff --git a/Makefile b/Makefile
index 3fc2ec2..8796fd5 100644
--- a/Makefile
+++ b/Makefile
@@ -14,6 +14,7 @@ develop:
 	maturin develop
 
 test: develop
+	. .venv/bin/activate
 	pytest
 
 .PHONY: validate-tags release