diff --git a/old/Dockerfile.big b/old/Dockerfile.big
index 8491198..71d0205 100644
--- a/old/Dockerfile.big
+++ b/old/Dockerfile.big
@@ -2,7 +2,7 @@ FROM golang:1.7 AS build
 ADD . /src
 WORKDIR /src
 RUN go get -d -v -t
-RUN go test --cover -v ./...
+RUN go test --cover -v ./... --run UnitTest
 RUN go build -v -o go-demo
 
 EXPOSE 8080