diff --git a/Makefile b/Makefile
index 973dad0..726d94d 100644
--- a/Makefile
+++ b/Makefile
@@ -19,7 +19,8 @@ lint:
 	-python3 -m vulture .
 
 test:
-    python3 -m pip install -q -r requirements.txt
+	python3 -m pip install -q -r requirements.txt
+	python3 -m pip install -q -r dev-requirements.txt
 	python3 -mpytest test
 
 bin: