diff --git a/.travis.yml b/.travis.yml
index bf70e3a..d69bf14 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -5,3 +5,4 @@ language: generic
 script:
   - docker build -t rust-alpine .
   - docker run --rm rust-alpine sh -c "echo 'fn main() {}' > a.rs && rustc a.rs && ./a"
+  - docker run --rm -e "USER=test" rust-alpine sh -c "cargo new --bin b && cd b && cargo run"
diff --git a/Dockerfile b/Dockerfile
index 95f3c01..3e2d5a9 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,8 +1,9 @@
-FROM alpine:3.4
+FROM alpine:edge
 
 RUN echo '@testing http://dl-cdn.alpinelinux.org/alpine/edge/testing' >> /etc/apk/repositories
 
 RUN apk add --no-cache \
+  cargo@testing \
   curl \
   g++ \
   rust@testing