diff --git a/Dockerfile b/Dockerfile
index c8cedf8..ba3651f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,7 +2,7 @@ FROM alpine:3.5
 RUN apk add --no-cache bash zsh curl
 WORKDIR /public
 COPY . .
-RUN sh --help 2>&1 | head -n1 && sh ./test.sh
-RUN zsh --version && zsh ./test.sh
-RUN bash --version && bash ./test.sh
+RUN sh ./test.sh
+RUN zsh ./test.sh
+RUN bash ./test.sh
 RUN echo "All tests passed!" > index.html