diff --git a/Makefile b/Makefile
index 95031ef56e155d7b0166dec760949cc4098a3d32..014748ef27a219a7416695ba8ab713f7ea559bb7 100644
--- a/Makefile
+++ b/Makefile
@@ -38,7 +38,7 @@ install: $(VENV)
 .PHONY: test
 test: $(VENV)
 	$(venv) $(mypy) -p greg
-	$(venv) $(COVERAGE) run --source greg,gregsite -m $(PYTEST)
+	$(venv) $(COVERAGE) run --source greg,gregsite,gregui -m $(PYTEST)
 	$(venv) $(COVERAGE) report
 	$(venv) $(COVERAGE) xml