diff --git a/Makefile b/Makefile
index b49eff6..e9e363a 100644
--- a/Makefile
+++ b/Makefile
@@ -17,9 +17,11 @@ all: main.go
 	$(GO) build -v $(GOFLAGS) -o $(EXECUTABLE) $<
 
 clean: ## Delete all files in the current directory that are normally created by building the program
+	-rm $(srcdir)/internal/testing/httptest/{cert,key}.pem
 	$(GO) clean
 
 check: ## Perform self-tests
+	$(GO) generate $(srcdir)/internal/testing/httptest/...
 	$(GO) test -v -cover -failfast -short -shuffle=on $(GOFLAGS) $(srcdir)/...
 
 .PHONY: help