diff --git a/Makefile b/Makefile
index 61af05f5..b1be5105 100644
--- a/Makefile
+++ b/Makefile
@@ -42,7 +42,7 @@ prep:
 
 # Run the tests against the debug build of Wren.
 test: debug
-	@./script/test.py
+	@./script/test.py $(suite)
 
 # Generate the Wren site.
 docs: