diff --git a/Dockerfile b/Dockerfile
index 5fafcfb628e24c2e58bfd99b4b42280b1f39abc3..50bc42f2fdd71be8271679e5177b6d5a834722b7 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,6 +2,7 @@ FROM alpine:3.12
 RUN apk add --update --no-cache \
         bats \
         build-base \
+        docker \
         git \
     ;
 RUN wget https://github.com/cloudbees-oss/juxr/releases/download/0.1.22/juxr-x86_64-unknown-linux-musl.tar.gz -O - | tar -xzC /usr/local/bin