3 files changed, 24 insertions, 1 deletions
diff --git a/test/docker-compose.yml b/test/docker-compose.yml
index 1a4374a..ec55b25 100644
--- a/test/docker-compose.yml
+++ b/test/docker-compose.yml
@@ -1,7 +1,10 @@
 version: '3'
 services:
   test:
-    image: "ubuntu:${DISTRO:-xenial}"
+    build:
+      context: docker/
+      args:
+        DISTRO: "${DISTRO:-xenial}"
     volumes:
       - ../:/src
     command: /src/test/unit/test.sh
diff --git a/test/docker/Dockerfile b/test/docker/Dockerfile
new file mode 100644
index 0000000..b67e6f0
--- /dev/null
+++ b/test/docker/Dockerfile
@@ -0,0 +1,9 @@
+ARG DISTRO=xenial
+
+FROM ubuntu:$DISTRO
+
+RUN apt-get update && \
+    DEBIAN_FRONTEND=noninteractive \
+        apt-get install -y --no-install-recommends git
+
+RUN git config --global --add safe.directory /src
diff --git a/test/unit/test.sh b/test/unit/test.sh
index c7645ea..f693aa1 100755
--- a/test/unit/test.sh
+++ b/test/unit/test.sh
@@ -417,7 +417,18 @@ $test_dest_dir/foo/2.txt->$test_src_dir/%DEST%/foo/2.txt"
     verify_mode "$expected_mode" "$test_src_dir/%DEST%/1.txt"
 }
 
+show_env() {
+    echo
+    echo ======================================================================
+    echo Environment
+    echo ======================================================================
+
+    bash --version
+}
+
 main() {
+    show_env
+
     test_update_works
     test_remove_works
     test_remove_does_not_overwrite_files