From 8d233edcf27a7f5081d7cc54151b63237ff2af5f Mon Sep 17 00:00:00 2001
From: Scott Moser <smoser@brickies.net>
Date: Tue, 14 Nov 2023 19:09:47 -0500
Subject: [PATCH] test: add busybox image, use it to mostly replace centos
 image (#545)

This is basically the add of BUSYBOX image and then using
that instead of centos image.

Moving to busybox from centos required a few changed assumptions:

 * drop -P from grep - busybox's grep did not support -P. instead
   use posix groups ([:space:])
 * don't use long --format for 'stat' - busybox stat didn't like
   this, so just use '-c'.
 * mount - /usr/bin/mount -> /bin/mount - busybox image only has
   /bin, not /usr/bin/mount
 * /bin/bash - busybox image does not have bin/bash

The tests "squashfs empty change no layer" and
"tar empty change no layer" do not work with the busybox image.
There are layers created, and they have this content:

    $ tar tvf oci/blobs/sha256/acff571f8cf*b03f45
    tar: Removing leading `/' from member names
    drwxr-xr-x 0/0               0 2023-11-13 14:06 /
    drwxr-xr-x 0/0               0 2023-11-13 14:06 etc/
    ---------- 0/0               0 2023-11-13 14:06 etc/resolv.conf
    drwxr-xr-x 0/0               0 2023-11-13 14:06 proc/
    drwxr-xr-x 0/0               0 2023-11-13 14:06 sys/

The content there are results of stacker.  I don't have a good way
to avoid them at the moment.

I've also left the bom tests in place with the centos image.
Those would have had to have been adjusted and probably
would not work with busybox at the moment.

Signed-off-by: Scott Moser <smoser@brickies.net>
---
 Makefile                        |  9 ++++-
 test/annotations-namespace.bats |  4 +--
 test/annotations.bats           |  2 +-
 test/args.bats                  |  2 +-
 test/asterisk.bats              |  2 +-
 test/atomfs.bats                |  8 ++---
 test/basic.bats                 | 64 ++++++++++++++++-----------------
 test/binds.bats                 |  8 ++---
 test/broken-link.bats           |  2 +-
 test/build-only.bats            | 40 ++++++++++-----------
 test/built-type.bats            |  2 +-
 test/caching.bats               | 24 ++++++-------
 test/chroot.bats                |  2 +-
 test/clean.bats                 |  2 +-
 test/config.bats                |  8 ++---
 test/dependency-order.bats      |  2 +-
 test/dirlinks.bats              |  2 +-
 test/docker-base.bats           | 10 +++---
 test/entrypoint.bats            |  2 +-
 test/env.bats                   |  6 ++--
 test/helpers.bash               |  3 ++
 test/import-http.bats           | 10 +++---
 test/import.bats                | 50 +++++++++++++-------------
 test/invalid.bats               |  6 ++--
 test/labels.bats                |  2 +-
 test/log.bats                   |  4 +--
 test/multi-arch.bats            |  8 ++---
 test/multiple-output-types.bats | 12 +++----
 test/oci-import.bats            | 26 +++++++-------
 test/overlay-dirs.bats          | 17 ++++-----
 test/prerequisites.bats         | 16 ++++-----
 test/publish.bats               |  6 ++--
 test/squashfs.bats              | 48 ++++++++++++-------------
 test/tmpfs.bats                 |  2 +-
 test/unprivileged.bats          | 28 +++++++--------
 35 files changed, 225 insertions(+), 214 deletions(-)

diff --git a/Makefile b/Makefile
index bdebeb69..5dd54a16 100644
--- a/Makefile
+++ b/Makefile
@@ -20,9 +20,15 @@ build_stacker = go build -tags "$(BUILD_TAGS) $1" -ldflags "-X main.version=$(VE
 STACKER_DOCKER_BASE?=docker://ghcr.io/project-stacker/
 # They default to their image name in STACKER_DOCKER_BASE
 STACKER_BUILD_BASE_IMAGE?=$(STACKER_DOCKER_BASE)alpine:edge
+STACKER_BUILD_BUSYBOX_IMAGE?=$(STACKER_DOCKER_BASE)busybox:latest
 STACKER_BUILD_CENTOS_IMAGE?=$(STACKER_DOCKER_BASE)centos:latest
 STACKER_BUILD_UBUNTU_IMAGE?=$(STACKER_DOCKER_BASE)ubuntu:latest
-STACKER_BUILD_IMAGES = $(STACKER_BUILD_BASE_IMAGE) $(STACKER_BUILD_CENTOS_IMAGE) $(STACKER_BUILD_UBUNTU_IMAGE)
+STACKER_BUILD_IMAGES = \
+	$(STACKER_BUILD_BASE_IMAGE) \
+	$(STACKER_BUILD_BUSYBOX_IMAGE) \
+	$(STACKER_BUILD_CENTOS_IMAGE) \
+	$(STACKER_BUILD_UBUNTU_IMAGE)
+
 LXC_CLONE_URL?=https://github.com/lxc/lxc
 LXC_BRANCH?=stable-5.0
 
@@ -128,6 +134,7 @@ test: stacker $(REGCLIENT) $(SKOPEO) $(ZOT)
 		LXC_BRANCH=$(LXC_BRANCH) \
 		LXC_CLONE_URL=$(LXC_CLONE_URL) \
 		STACKER_BUILD_BASE_IMAGE=$(STACKER_BUILD_BASE_IMAGE) \
+		STACKER_BUILD_BUSYBOX_IMAGE=$(STACKER_BUILD_BUSYBOX_IMAGE) \
 		STACKER_BUILD_CENTOS_IMAGE=$(STACKER_BUILD_CENTOS_IMAGE) \
 		STACKER_BUILD_UBUNTU_IMAGE=$(STACKER_BUILD_UBUNTU_IMAGE) \
 		./test/main.py \
diff --git a/test/annotations-namespace.bats b/test/annotations-namespace.bats
index d8210279..e9f2ae00 100644
--- a/test/annotations-namespace.bats
+++ b/test/annotations-namespace.bats
@@ -13,7 +13,7 @@ function teardown() {
 thing:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     run: ls
 EOF
     stacker build --annotations-namespace=namespace.example
@@ -28,7 +28,7 @@ EOF
 thing:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     run: ls
 EOF
     stacker build
diff --git a/test/annotations.bats b/test/annotations.bats
index 82feba6a..81025017 100644
--- a/test/annotations.bats
+++ b/test/annotations.bats
@@ -13,7 +13,7 @@ function teardown() {
 thing:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     run: ls
     annotations:
       a.b.c.key: val
diff --git a/test/args.bats b/test/args.bats
index f987491d..004a814f 100644
--- a/test/args.bats
+++ b/test/args.bats
@@ -13,7 +13,7 @@ function teardown() {
 parent:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
 child:
     from:
         type: built
diff --git a/test/asterisk.bats b/test/asterisk.bats
index 39abb122..39e42409 100644
--- a/test/asterisk.bats
+++ b/test/asterisk.bats
@@ -13,7 +13,7 @@ function teardown() {
 a:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     run: |
         mkdir /mybin
         cp /bin/* /mybin
diff --git a/test/atomfs.bats b/test/atomfs.bats
index 2c05a502..8215af97 100644
--- a/test/atomfs.bats
+++ b/test/atomfs.bats
@@ -16,7 +16,7 @@ function basic_test() {
 test:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     run: |
         touch /hello
 EOF
@@ -48,7 +48,7 @@ EOF
 base:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     run: touch /base
 a:
     from:
@@ -105,7 +105,7 @@ EOF
 
     # c should still be ok
     [ -f c/c ]
-    [ -f c/sbin/init ]
+    [ -f c/bin/sh ]
     stacker internal-go atomfs umount c
 
     # c's last layer shouldn't exist any more, since it is unique
@@ -121,7 +121,7 @@ EOF
 test:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     run: |
         touch /hello
 EOF
diff --git a/test/basic.bats b/test/basic.bats
index dbf496e7..70414df9 100644
--- a/test/basic.bats
+++ b/test/basic.bats
@@ -10,10 +10,10 @@ function teardown() {
 
 @test "multiple stacker builds in a row" {
     cat > stacker.yaml <<EOF
-centos:
+busybox:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     import: import
 EOF
     echo 1 > import
@@ -28,10 +28,10 @@ EOF
 
 @test "basic workings" {
     cat > stacker.yaml <<EOF
-centos:
+busybox:
     from:
         type: tar
-        url: .stacker/layer-bases/centos.tar
+        url: .stacker/layer-bases/busybox.tar
     import:
         - ./stacker.yaml
         - https://www.cisco.com/favicon.ico
@@ -53,7 +53,7 @@ centos:
 layer1:
     from:
         type: built
-        tag: centos
+        tag: busybox
     run:
         - rm /favicon.ico
 EOF
@@ -62,29 +62,29 @@ EOF
     chmod +x executable
     mkdir -p .stacker/layer-bases
     chmod 777 .stacker/layer-bases
-    image_copy oci:$CENTOS_OCI oci:.stacker/layer-bases/oci:centos
-    umoci unpack --image .stacker/layer-bases/oci:centos dest
-    tar caf .stacker/layer-bases/centos.tar -C dest/rootfs .
+    image_copy oci:$BUSYBOX_OCI oci:.stacker/layer-bases/oci:busybox
+    umoci unpack --image .stacker/layer-bases/oci:busybox dest
+    tar caf .stacker/layer-bases/busybox.tar -C dest/rootfs .
     rm -rf dest
 
     stacker build --substitute "FAVICON=favicon.ico"
     [ "$status" -eq 0 ]
 
     # did we really download the image to the right place?
-    [ -f .stacker/layer-bases/centos.tar ]
+    [ -f .stacker/layer-bases/busybox.tar ]
 
     # did run actually copy the favicon to the right place?
-    stacker grab centos:/favicon.ico
-    [ "$(sha .stacker/imports/centos/favicon.ico)" == "$(sha favicon.ico)" ]
+    stacker grab busybox:/favicon.ico
+    [ "$(sha .stacker/imports/busybox/favicon.ico)" == "$(sha favicon.ico)" ]
 
     [ ! -f roots/layer1/rootfs/favicon.ico ] || [ ! -f roots/layer1/overlay/favicon.ico ]
 
     rm executable
-    stacker grab centos:/usr/bin/executable
+    stacker grab busybox:/usr/bin/executable
     [ "$(stat --format="%a" executable)" = "755" ]
 
     # did we do a copy correctly?
-    [ "$(sha .stacker/imports/centos/stacker.yaml)" == "$(sha ./stacker.yaml)" ]
+    [ "$(sha .stacker/imports/busybox/stacker.yaml)" == "$(sha ./stacker.yaml)" ]
 
     # check OCI image generation
     manifest=$(cat oci/index.json | jq -r .manifests[0].digest | cut -f2 -d:)
@@ -140,15 +140,15 @@ EOF
 
 @test "stacker.yaml without imports can run" {
     cat > stacker.yaml <<EOF
-centos:
+busybox:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     run: |
         touch /foo
 EOF
     stacker build
-    umoci unpack --image oci:centos dest
+    umoci unpack --image oci:busybox dest
     [ -f dest/rootfs/foo ]
 }
 
@@ -162,25 +162,25 @@ EOF
 @test "use colons in roots-dir path name should fail" {
     local tmpd=$(pwd)
     cat > stacker.yaml <<EOF
-centos:
+busybox:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     run: |
         touch /foo
 EOF
     bad_stacker --roots-dir $tmpd/with:colon build
     [ "$status" -eq 1 ]
     echo $output | grep "forbidden"
-} 
+}
 
 @test "use colons in layer name should fail" {
     local tmpd=$(pwd)
     cat > stacker.yaml <<EOF
-centos:with:colon:
+busybox:with:colon:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     run: |
         touch /foo
 EOF
@@ -194,10 +194,10 @@ EOF
     FAVICON: favicon.ico
 EOF
     cat > stacker.yaml <<EOF
-centos:
+busybox:
     from:
         type: tar
-        url: .stacker/layer-bases/centos.tar
+        url: .stacker/layer-bases/busybox.tar
     import:
         - ./stacker.yaml
         - https://www.cisco.com/favicon.ico
@@ -219,7 +219,7 @@ centos:
 layer1:
     from:
         type: built
-        tag: centos
+        tag: busybox
     run:
         - rm /favicon.ico
 EOF
@@ -228,29 +228,29 @@ EOF
     chmod +x executable
     mkdir -p .stacker/layer-bases
     chmod 777 .stacker/layer-bases
-    image_copy oci:$CENTOS_OCI oci:.stacker/layer-bases/oci:centos
-    umoci unpack --image .stacker/layer-bases/oci:centos dest
-    tar caf .stacker/layer-bases/centos.tar -C dest/rootfs .
+    image_copy oci:$BUSYBOX_OCI oci:.stacker/layer-bases/oci:busybox
+    umoci unpack --image .stacker/layer-bases/oci:busybox dest
+    tar caf .stacker/layer-bases/busybox.tar -C dest/rootfs .
     rm -rf dest
 
     stacker build --substitute-file subs.yaml
     [ "$status" -eq 0 ]
 
     # did we really download the image to the right place?
-    [ -f .stacker/layer-bases/centos.tar ]
+    [ -f .stacker/layer-bases/busybox.tar ]
 
     # did run actually copy the favicon to the right place?
-    stacker grab centos:/favicon.ico
-    [ "$(sha .stacker/imports/centos/favicon.ico)" == "$(sha favicon.ico)" ]
+    stacker grab busybox:/favicon.ico
+    [ "$(sha .stacker/imports/busybox/favicon.ico)" == "$(sha favicon.ico)" ]
 
     [ ! -f roots/layer1/rootfs/favicon.ico ] || [ ! -f roots/layer1/overlay/favicon.ico ]
 
     rm executable
-    stacker grab centos:/usr/bin/executable
+    stacker grab busybox:/usr/bin/executable
     [ "$(stat --format="%a" executable)" = "755" ]
 
     # did we do a copy correctly?
-    [ "$(sha .stacker/imports/centos/stacker.yaml)" == "$(sha ./stacker.yaml)" ]
+    [ "$(sha .stacker/imports/busybox/stacker.yaml)" == "$(sha ./stacker.yaml)" ]
 
     # check OCI image generation
     manifest=$(cat oci/index.json | jq -r .manifests[0].digest | cut -f2 -d:)
diff --git a/test/binds.bats b/test/binds.bats
index 2ecad856..302ce423 100644
--- a/test/binds.bats
+++ b/test/binds.bats
@@ -13,7 +13,7 @@ function teardown() {
 bind-test:
     from:
         type: oci
-        url: ${{CENTOS_OCI}}
+        url: ${{BUSYBOX_OCI}}
     binds:
         - ${{bind_path}} -> /root/tree1/foo
     run: |
@@ -29,7 +29,7 @@ EOF
 
     bind_path=$(realpath tree1/foo)
 
-    out=$(stacker build --substitute bind_path=${bind_path} --substitute CENTOS_OCI=$CENTOS_OCI)
+    out=$(stacker build --substitute bind_path=${bind_path} --substitute BUSYBOX_OCI=$BUSYBOX_OCI)
 
     [[ "${out}" =~ ^(.*filesystem bind-test built successfully)$ ]]
 
@@ -41,7 +41,7 @@ EOF
 bind-test:
     from:
         type: oci
-        url: ${{CENTOS_OCI}}
+        url: ${{BUSYBOX_OCI}}
     binds:
         - source: ${{bind_path1}}
           dest: /root/tree1/foo
@@ -65,7 +65,7 @@ EOF
     out=$(stacker build \
         "--substitute=bind_path1=${bind_path1}" \
         "--substitute=bind_path2=${bind_path2}" \
-        "--substitute=CENTOS_OCI=$CENTOS_OCI" ) || {
+        "--substitute=BUSYBOX_OCI=$BUSYBOX_OCI" ) || {
              printf "%s\n" "$out" 1>&2
              exit 1
         }
diff --git a/test/broken-link.bats b/test/broken-link.bats
index ce776e9f..a43391b7 100644
--- a/test/broken-link.bats
+++ b/test/broken-link.bats
@@ -14,7 +14,7 @@ function teardown() {
 broken_link:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     import:
         - dir
     run: cp -a /stacker/imports/dir/testln /testln
diff --git a/test/build-only.bats b/test/build-only.bats
index b3d0f1c7..3d251d04 100644
--- a/test/build-only.bats
+++ b/test/build-only.bats
@@ -14,7 +14,7 @@ function teardown() {
 parent:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
 EOF
 
     cat > stacker.yaml <<EOF
@@ -36,7 +36,7 @@ EOF
 parent:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
 EOF
 
     cat > stacker.yaml <<EOF
@@ -59,7 +59,7 @@ EOF
 parent:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     run: |
         false
     build_only: true
@@ -79,10 +79,10 @@ EOF
 
 @test "build only stacker" {
     cat > stacker.yaml <<EOF
-centos:
+busybox:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     import: https://www.cisco.com/favicon.ico
     run: |
         cp /stacker/imports/favicon.ico /favicon.ico
@@ -90,9 +90,9 @@ centos:
 layer1:
     from:
         type: built
-        tag: centos
+        tag: busybox
     import:
-        - stacker://centos/favicon.ico
+        - stacker://busybox/favicon.ico
     run:
         - cp /stacker/imports/favicon.ico /favicon2.ico
 EOF
@@ -104,10 +104,10 @@ EOF
 
 @test "stacker grab" {
     cat > stacker.yaml <<EOF
-centos:
+busybox:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     import: https://www.cisco.com/favicon.ico
     run: |
         cp /stacker/imports/favicon.ico /favicon.ico
@@ -115,16 +115,16 @@ centos:
 layer1:
     from:
         type: built
-        tag: centos
+        tag: busybox
     import:
-        - stacker://centos/favicon.ico
+        - stacker://busybox/favicon.ico
     run:
         - cp /stacker/imports/favicon.ico /favicon2.ico
 EOF
     stacker build
-    stacker grab centos:/favicon.ico
+    stacker grab busybox:/favicon.ico
     [ -f favicon.ico ]
-    [ "$(sha favicon.ico)" == "$(sha .stacker/imports/centos/favicon.ico)" ]
+    [ "$(sha favicon.ico)" == "$(sha .stacker/imports/busybox/favicon.ico)" ]
 }
 
 @test "build only + unpriv + overlay clears state" {
@@ -132,7 +132,7 @@ EOF
 first:
     from:
         type: oci
-        url: ${{CENTOS_OCI}}
+        url: ${{BUSYBOX_OCI}}
     build_only: true
     run: |
         echo "run number ${{RUN_NUMBER}}"
@@ -144,8 +144,8 @@ first:
         chmod 500 $THEPATH
 EOF
 
-    stacker build --layer-type=squashfs --substitute "RUN_NUMBER=1" --substitute CENTOS_OCI=$CENTOS_OCI
-    stacker build --layer-type=squashfs --substitute "RUN_NUMBER=2" --substitute CENTOS_OCI=$CENTOS_OCI
+    stacker build --layer-type=squashfs --substitute "RUN_NUMBER=1" --substitute BUSYBOX_OCI=$BUSYBOX_OCI
+    stacker build --layer-type=squashfs --substitute "RUN_NUMBER=2" --substitute BUSYBOX_OCI=$BUSYBOX_OCI
 }
 
 @test "multiple build onlys in final chain rebuild OK" {
@@ -153,7 +153,7 @@ EOF
 one:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     run: |
         touch /1
 two:
@@ -181,12 +181,12 @@ four:
         [ -f /3 ]
         echo run number ${{RUN_NUMBER}}
 EOF
-    stacker build --substitute "RUN_NUMBER=1" --substitute CENTOS_OCI=$CENTOS_OCI
-    stacker build --substitute "RUN_NUMBER=2" --substitute CENTOS_OCI=$CENTOS_OCI
+    stacker build --substitute "RUN_NUMBER=1" --substitute BUSYBOX_OCI=$BUSYBOX_OCI
+    stacker build --substitute "RUN_NUMBER=2" --substitute BUSYBOX_OCI=$BUSYBOX_OCI
 
     stacker inspect
 
-    # should always build five layers, assuming centos is 1 layer
+    # should always build five layers, assuming busybox is 1 layer
     one_manifest=$(cat oci/index.json | jq -r .manifests[0].digest | cut -f2 -d:)
     one_layercount=$(cat oci/blobs/sha256/$one_manifest | jq -r '.layers | length')
     echo one_layercount "$one_layercount"
diff --git a/test/built-type.bats b/test/built-type.bats
index 15a8d803..23753ea4 100644
--- a/test/built-type.bats
+++ b/test/built-type.bats
@@ -13,7 +13,7 @@ function teardown() {
 parent:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     run: |
         touch /root/parent
         cat /proc/self/mountinfo
diff --git a/test/caching.bats b/test/caching.bats
index 8681ed79..8c5bd09f 100644
--- a/test/caching.bats
+++ b/test/caching.bats
@@ -34,7 +34,7 @@ test:
         type: oci
         url: oci:base
 EOF
-    image_copy oci:$CENTOS_OCI oci:oci:base
+    image_copy oci:$BUSYBOX_OCI oci:oci:base
     stacker build
     image_copy oci:$UBUNTU_OCI oci:oci:base
     stacker build
@@ -47,7 +47,7 @@ EOF
 build-base:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
 base:
     from:
         type: built
@@ -70,7 +70,7 @@ EOF
 import-cache:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     import:
         - link/foo
     run: cp /stacker/imports/foo/zomg /zomg
@@ -94,7 +94,7 @@ EOF
 a:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     import:
         - foo
     run: |
@@ -110,7 +110,7 @@ EOF
 a:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     import:
         - foo
     run: |
@@ -125,7 +125,7 @@ EOF
 bind-test:
     from:
         type: oci
-        url: ${{CENTOS_OCI}}
+        url: ${{BUSYBOX_OCI}}
     import:
         - tree1/foo/zomg
     binds:
@@ -147,8 +147,8 @@ EOF
     bind_path=$(realpath tree2/foo)
 
     # The layer should be built
-    stacker build --substitute bind_path=${bind_path} --substitute CENTOS_OCI=$CENTOS_OCI
-    out=$(stacker build --substitute bind_path=${bind_path} --substitute CENTOS_OCI=$CENTOS_OCI)
+    stacker build --substitute bind_path=${bind_path} --substitute BUSYBOX_OCI=$BUSYBOX_OCI
+    out=$(stacker build --substitute bind_path=${bind_path} --substitute BUSYBOX_OCI=$BUSYBOX_OCI)
     [[ "${out}" =~ ^(.*rebuilding cached layer due to use of binds in stacker file.*)$ ]]
     [[ "${out}" =~ ^(.*filesystem bind-test built successfully)$ ]]
 
@@ -158,7 +158,7 @@ EOF
     # just hack it.
     echo baz >> tree2/foo/zomg
     # The layer should be rebuilt since the there is a bind configuration in stacker.yaml
-    stacker build --substitute bind_path=${bind_path} --substitute CENTOS_OCI=$CENTOS_OCI
+    stacker build --substitute bind_path=${bind_path} --substitute BUSYBOX_OCI=$BUSYBOX_OCI
     [[ "${output}" =~ ^(.*filesystem bind-test built successfully)$ ]]
     [[ ! "${output}" =~ ^(.*found cached layer bind-test)$ ]]
 }
@@ -168,7 +168,7 @@ EOF
 mode-test:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     import:
         - executable
     run: cp /stacker/imports/executable /executable
@@ -203,7 +203,7 @@ EOF
 test:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     import:
         - foo
     run: cp /stacker/imports/foo /foo
@@ -218,7 +218,7 @@ EOF
 test:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
 EOF
     stacker build
     echo '{"version": 1, "cache": "lolnope"}' > .stacker/build.cache
diff --git a/test/chroot.bats b/test/chroot.bats
index 831fd539..c7d19921 100644
--- a/test/chroot.bats
+++ b/test/chroot.bats
@@ -14,7 +14,7 @@ function teardown() {
 thing:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     run: touch /test
 EOF
     stacker build
diff --git a/test/clean.bats b/test/clean.bats
index f0102df4..0eea2b29 100644
--- a/test/clean.bats
+++ b/test/clean.bats
@@ -13,7 +13,7 @@ function teardown() {
 test:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
 EOF
     stacker build
     stacker clean
diff --git a/test/config.bats b/test/config.bats
index 60790868..5c4fd9c3 100644
--- a/test/config.bats
+++ b/test/config.bats
@@ -18,7 +18,7 @@ function teardown() {
 test:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
 EOF
 
     stacker "--oci-dir=$tmpd/args-oci" "--stacker-dir=$tmpd/args-stacker" \
@@ -37,7 +37,7 @@ EOF
 test:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
 EOF
     cat > "$tmpd/config.yaml" <<EOF
 stacker_dir: $tmpd/config-stacker
@@ -74,7 +74,7 @@ my-build:
     build_only: true
     from:
         type: oci
-        url: ${{CENTOS_OCI}}
+        url: ${{BUSYBOX_OCI}}
     run: |
         #!/bin/sh
         set -e
@@ -103,7 +103,7 @@ oci_dir: $odir
 rootfs_dir: $rdir
 EOF
 
-    stacker "--config=$config_yaml" build "--stacker-file=$stacker_yaml" --substitute CENTOS_OCI=$CENTOS_OCI
+    stacker "--config=$config_yaml" build "--stacker-file=$stacker_yaml" --substitute BUSYBOX_OCI=$BUSYBOX_OCI
 
     cmp_files "$expected" "$rdir/my-base/overlay/content.txt"
 }
diff --git a/test/dependency-order.bats b/test/dependency-order.bats
index 7240d62e..202f24cc 100644
--- a/test/dependency-order.bats
+++ b/test/dependency-order.bats
@@ -26,7 +26,7 @@ EOF
 test:
     from:
         type: oci
-        tag: $CENTOS_OCI
+        tag: $BUSYBOX_OCI
     import:
         - stacker://foo/bar
         - stacker://baz/foo
diff --git a/test/dirlinks.bats b/test/dirlinks.bats
index b8c96ae0..eed64d20 100644
--- a/test/dirlinks.bats
+++ b/test/dirlinks.bats
@@ -13,7 +13,7 @@ function teardown() {
 parent:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     run: |
         mkdir /dir
         ln -s /dir /link
diff --git a/test/docker-base.bats b/test/docker-base.bats
index 92ff3613..b9191ce0 100644
--- a/test/docker-base.bats
+++ b/test/docker-base.bats
@@ -10,10 +10,10 @@ function teardown() {
 
 @test "importing from a docker hub" {
     cat > stacker.yaml <<EOF
-centos:
+busybox:
     from:
         type: docker
-        url: oci:${CENTOS_OCI}
+        url: oci:${BUSYBOX_OCI}
     import:
         - https://www.cisco.com/favicon.ico
     run: |
@@ -21,13 +21,13 @@ centos:
 layer1:
     from:
         type: built
-        tag: centos
+        tag: busybox
     run:
         - rm /favicon.ico
 EOF
     stacker build
-    stacker grab centos:/favicon.ico
-    [ "$(sha .stacker/imports/centos/favicon.ico)" == "$(sha favicon.ico)" ]
+    stacker grab busybox:/favicon.ico
+    [ "$(sha .stacker/imports/busybox/favicon.ico)" == "$(sha favicon.ico)" ]
     umoci unpack --image oci:layer1 dest
     [ ! -f dest/rootfs/favicon.ico ]
 }
diff --git a/test/entrypoint.bats b/test/entrypoint.bats
index 00d16e3b..affb3f36 100644
--- a/test/entrypoint.bats
+++ b/test/entrypoint.bats
@@ -13,7 +13,7 @@ function teardown() {
 base:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     cmd: foo
 layer1:
     from:
diff --git a/test/env.bats b/test/env.bats
index a5719647..fe9cf439 100644
--- a/test/env.bats
+++ b/test/env.bats
@@ -17,10 +17,10 @@ function teardown() {
 test:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     run: |
         # make sure that /stacker is readonly
-        grep "/stacker" /proc/mounts | grep -P "\sro[\s,]"
+        grep "/stacker" /proc/mounts | grep "[[:space:]]ro[[:space:],]"
 
         # make sure stacker deleted the non-import
         [ ! -f /stacker/foo ]
@@ -33,7 +33,7 @@ EOF
 test:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     run: |
         echo hello world
 EOF
diff --git a/test/helpers.bash b/test/helpers.bash
index dab0b1eb..8a8ee885 100644
--- a/test/helpers.bash
+++ b/test/helpers.bash
@@ -40,13 +40,16 @@ function image_copy {
 }
 
 STACKER_DOCKER_BASE=${STACKER_DOCKER_BASE:-docker://}
+STACKER_BUILD_BUSYBOX_IMAGE=${STACKER_BUILD_BUSYBOX_IMAGE:-${STACKER_DOCKER_BASE}busybox:latest}
 STACKER_BUILD_CENTOS_IMAGE=${STACKER_BUILD_CENTOS_IMAGE:-${STACKER_DOCKER_BASE}centos:latest}
 STACKER_BUILD_UBUNTU_IMAGE=${STACKER_BUILD_UBUNTU_IMAGE:-${STACKER_DOCKER_BASE}ubuntu:latest}
 (
     flock 9
+    [ -f "$ROOT_DIR/test/busybox/index.json" ] || (image_copy "${STACKER_BUILD_BUSYBOX_IMAGE}" "oci:$ROOT_DIR/test/busybox:latest" && chmod -R 777 "$ROOT_DIR/test/busybox")
     [ -f "$ROOT_DIR/test/centos/index.json" ] || (image_copy "${STACKER_BUILD_CENTOS_IMAGE}" "oci:$ROOT_DIR/test/centos:latest" && chmod -R 777 "$ROOT_DIR/test/centos")
     [ -f "$ROOT_DIR/test/ubuntu/index.json" ] || (image_copy "${STACKER_BUILD_UBUNTU_IMAGE}" "oci:$ROOT_DIR/test/ubuntu:latest" && chmod -R 777 "$ROOT_DIR/test/ubuntu")
 ) 9<$ROOT_DIR/test/main.py
+export BUSYBOX_OCI="$ROOT_DIR/test/busybox:latest"
 export CENTOS_OCI="$ROOT_DIR/test/centos:latest"
 export UBUNTU_OCI="$ROOT_DIR/test/ubuntu:latest"
 export PATH="$PATH:$ROOT_DIR/hack/tools/bin"
diff --git a/test/import-http.bats b/test/import-http.bats
index 1541821e..f2bbeb7d 100644
--- a/test/import-http.bats
+++ b/test/import-http.bats
@@ -11,10 +11,10 @@ function setup() {
     # As we want to be able to have network for base image download
     # in img/stacker1.yaml but disconnect the network for test file download
     cat > img/stacker1.yaml <<EOF
-centos_base:
+busybox_base:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     run: |
         ls
 EOF
@@ -22,7 +22,7 @@ EOF
 img:
     from:
         type: oci
-        url: $(pwd)/oci:centos_base
+        url: $(pwd)/oci:busybox_base
     import:
         - http://network-test.debian.org/nm
     run: |
@@ -75,10 +75,10 @@ function teardown() {
 
 @test "importing to a dest" {
     cat > img/stacker1.yaml <<EOF
-centos_base:
+busybox_base:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     import:
         - path: https://www.cisco.com/favicon.ico
           dest: /dest/icon
diff --git a/test/import.bats b/test/import.bats
index f8b77c6a..629e1784 100644
--- a/test/import.bats
+++ b/test/import.bats
@@ -14,7 +14,7 @@ function teardown() {
 thing:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     import:
         - https://bing.com/favicon.ico
 EOF
@@ -31,10 +31,10 @@ EOF
     mkdir -p recursive
     touch recursive/child
     cat > stacker.yaml <<EOF
-centos:
+busybox:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     import:
         - recursive
     run: |
@@ -52,7 +52,7 @@ EOF
 first:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     import:
         - recursive
     run: |
@@ -62,7 +62,7 @@ first:
 second:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     import:
         - stacker://first/recursive
     run: |
@@ -81,7 +81,7 @@ EOF
 first:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     import:
         - path: test_file
           hash: $test_file_sha
@@ -109,10 +109,10 @@ EOF
 @test "import with unmatched hash should fail" {
     touch test_file
     cat > stacker.yaml <<EOF
-centos:
+busybox:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     import:
         - path: test_file
           hash: e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b856
@@ -124,10 +124,10 @@ EOF
 
 @test "invalid hash should fail" {
     cat > stacker.yaml <<EOF
-centos:
+busybox:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     import:
         - path: test_file
           hash: 1234abcdef
@@ -144,7 +144,7 @@ EOF
 first:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     import:
         - path: test_file
           hash: $test_file_sha
@@ -172,7 +172,7 @@ EOF
 thing:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     import:
         - path: https://www.google.com/favicon.ico
           hash: $google_sha
@@ -189,7 +189,7 @@ EOF
 thing:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     import:
         - path: https://www.google.com/favicon.ico
           hash: 0d4856785d1d3c3aad3e5311e654c70c19d335f927c24ebb89dfcd52b2d988cb
@@ -208,7 +208,7 @@ EOF
 thing:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     import:
         - path: https://www.google.com/favicon.ico
           hash: $google_sha
@@ -231,7 +231,7 @@ EOF
 thing:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     import:
         - path: https://www.google.com/favicon.ico
         - path: test_file
@@ -249,7 +249,7 @@ EOF
 thing:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     import:
         - path: https://www.google.com/favicon.ico
           hash: $google_sha
@@ -261,10 +261,10 @@ EOF
 
 @test "invalid import " {
     cat > stacker.yaml <<EOF
-centos:
+busybox:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     import:
         - "zomg"
         - - "one"
@@ -275,10 +275,10 @@ EOF
 
 @test "import a full directory tree with siblings" {
     cat > stacker.yaml <<EOF
-centos:
+busybox:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     import:
         - dir
     run: |
@@ -306,7 +306,7 @@ EOF
 first:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     import:
         - path: test_file
           hash: $test_file_sha
@@ -402,7 +402,7 @@ EOF
 first:
   from:
     type: oci
-    url: $CENTOS_OCI
+    url: $BUSYBOX_OCI
   import:
   - path: folder1/
     dest: /folder1/
@@ -421,7 +421,7 @@ second:
 third:
   from:
     type: oci
-    url: $CENTOS_OCI
+    url: $BUSYBOX_OCI
   import:
     - path: stacker://second/folder1/
       dest: /folder1/
@@ -432,7 +432,7 @@ third:
 fourth:
   from:
     type: oci
-    url: $CENTOS_OCI
+    url: $BUSYBOX_OCI
   import:
   - path: folder1/
     dest: /
@@ -445,7 +445,7 @@ fourth:
 fifth:
   from:
     type: oci
-    url: $CENTOS_OCI
+    url: $BUSYBOX_OCI
   import:
   - path: folder1/subfolder2/
     dest: /folder3/
diff --git a/test/invalid.bats b/test/invalid.bats
index 7db3d000..2f181b90 100644
--- a/test/invalid.bats
+++ b/test/invalid.bats
@@ -13,7 +13,7 @@ function teardown() {
 bad:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     import:
         - stacker://idontexist/file
 EOF
@@ -34,7 +34,7 @@ EOF
 layer1:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
 EOF
     cat > stacker2.yaml <<EOF
 config:
@@ -43,7 +43,7 @@ config:
 layer2:
     from:
         type: built
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
 EOF
     bad_stacker build -f stacker2.yaml
 }
diff --git a/test/labels.bats b/test/labels.bats
index cafdc21d..c34ada40 100644
--- a/test/labels.bats
+++ b/test/labels.bats
@@ -13,7 +13,7 @@ function teardown() {
 label:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     generate_labels: |
         echo -n "rocks" > /stacker/oci-labels/meshuggah
 EOF
diff --git a/test/log.bats b/test/log.bats
index 4a38cccc..853bef62 100644
--- a/test/log.bats
+++ b/test/log.bats
@@ -34,7 +34,7 @@ function teardown() {
 test:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
 EOF
 
     stacker --progress build
@@ -46,7 +46,7 @@ EOF
 test:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
 EOF
 
     stacker build
diff --git a/test/multi-arch.bats b/test/multi-arch.bats
index 3755b0d5..2360f3dc 100644
--- a/test/multi-arch.bats
+++ b/test/multi-arch.bats
@@ -10,12 +10,12 @@ function teardown() {
 
 @test "multi-arch/os support" {
     cat > stacker.yaml <<EOF
-centos:
+busybox:
     os: darwin
     arch: arm64
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     import:
         - https://www.cisco.com/favicon.ico
 EOF
@@ -31,11 +31,11 @@ EOF
 
 @test "multi-arch/os bad config fails" {
     cat > stacker.yaml <<EOF
-centos:
+busybox:
     os:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     import:
         - https://www.cisco.com/favicon.ico
 EOF
diff --git a/test/multiple-output-types.bats b/test/multiple-output-types.bats
index 1896312c..b3f83045 100644
--- a/test/multiple-output-types.bats
+++ b/test/multiple-output-types.bats
@@ -13,7 +13,7 @@ function teardown() {
 test:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     run: |
         echo meshuggah > /rocks
 EOF
@@ -36,7 +36,7 @@ EOF
 parent:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     run: |
         echo meshuggah > /rocks
 child:
@@ -72,7 +72,7 @@ EOF
 parent:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     run: |
         echo meshuggah > /rocks
     build_only: true
@@ -109,7 +109,7 @@ EOF
 parent:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     run: |
         echo meshuggah > /rocks
 EOF
@@ -124,7 +124,7 @@ EOF
 one:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
 two:
     build_only: true
     from:
@@ -176,7 +176,7 @@ EOF
 one:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
 two:
     build_only: true
     from:
diff --git a/test/oci-import.bats b/test/oci-import.bats
index f7b8ef75..d54d0393 100644
--- a/test/oci-import.bats
+++ b/test/oci-import.bats
@@ -13,18 +13,18 @@ function teardown() {
 output1:
     from:
         type: oci
-        url: oci:centos
+        url: oci:busybox
 output2:
     from:
         type: oci
-        url: oci:centos
+        url: oci:busybox
 EOF
 
-    image_copy oci:$CENTOS_OCI oci:oci:centos
+    image_copy oci:$BUSYBOX_OCI oci:oci:busybox
     stacker build
 
     name0=$(cat oci/index.json | jq -r .manifests[0].annotations.'"org.opencontainers.image.ref.name"')
-    [ "$name0" == "centos" ]
+    [ "$name0" == "busybox" ]
     name1=$(cat oci/index.json | jq -r .manifests[1].annotations.'"org.opencontainers.image.ref.name"')
     [ "$name1" == "output1" ]
     name2=$(cat oci/index.json | jq -r .manifests[2].annotations.'"org.opencontainers.image.ref.name"')
@@ -33,28 +33,28 @@ EOF
 
 @test "oci imports" {
     cat > stacker.yaml <<EOF
-centos2:
+busybox2:
     from:
         type: oci
-        url: dest:centos
+        url: dest:busybox
 EOF
-    image_copy oci:$CENTOS_OCI oci:dest:centos
+    image_copy oci:$BUSYBOX_OCI oci:dest:busybox
     stacker build
-    [ "$(umoci ls --layout ./oci)" == "$(printf "centos2")" ]
+    [ "$(umoci ls --layout ./oci)" == "$(printf "busybox2")" ]
 }
 
 @test "oci imports colons in version" {
     cat > stacker.yaml <<EOF
-centos3:
+busybox3:
     from:
         type: oci
-        url: dest:centos:0.1.1
+        url: dest:busybox:0.1.1
     run:
         touch /zomg
 EOF
-    image_copy oci:$CENTOS_OCI oci:dest:centos:0.1.1
+    image_copy oci:$BUSYBOX_OCI oci:dest:busybox:0.1.1
     stacker build
-    [ "$(umoci ls --layout ./oci)" == "$(printf "centos3")" ]
-    umoci unpack --image oci:centos3 dest
+    [ "$(umoci ls --layout ./oci)" == "$(printf "busybox3")" ]
+    umoci unpack --image oci:busybox3 dest
     [ -f dest/rootfs/zomg ]
 }
diff --git a/test/overlay-dirs.bats b/test/overlay-dirs.bats
index 174f05a9..896a1837 100644
--- a/test/overlay-dirs.bats
+++ b/test/overlay-dirs.bats
@@ -19,7 +19,7 @@ function teardown() {
 first:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     overlay_dirs:
         - source: dir_to_overlay
     run: |
@@ -42,7 +42,7 @@ EOF
 first:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     overlay_dirs:
         - source: dir_to_overlay
     run: |
@@ -68,7 +68,7 @@ EOF
 build:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     binds:
         - dir_to_overlay -> /dir_to_overlay
     run: |
@@ -98,7 +98,7 @@ EOF
 first:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     overlay_dirs:
         - source: dir_to_overlay
           dest: /usr/local
@@ -122,7 +122,7 @@ EOF
 first:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     overlay_dirs:
         - source: dir_to_overlay1
           dest: /usr/local1
@@ -178,14 +178,15 @@ EOF
 first:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     overlay_dirs:
         - source: dir_to_overlay
           dest: /usr/local
     run: |
         [ -f /usr/local/file ]
-        [ "\$(stat --format=%G /usr/local/file )" == "root" ]
-        [ "\$(stat --format=%U /usr/local/file )" == "root" ]
+        # -c == --format, but busybox does not support --format
+        [ "\$(stat -c%G /usr/local/file )" == "root" ]
+        [ "\$(stat -c%U /usr/local/file )" == "root" ]
 EOF
     stacker build
 
diff --git a/test/prerequisites.bats b/test/prerequisites.bats
index 44a91f56..04052788 100644
--- a/test/prerequisites.bats
+++ b/test/prerequisites.bats
@@ -8,7 +8,7 @@ function setup() {
 layer1_1:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     import:
         - import1
     run: |
@@ -16,7 +16,7 @@ layer1_1:
 layer1_2:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     run:
         touch /root/import0
 EOF
@@ -161,7 +161,7 @@ EOF
 one:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     run: |
         touch /one
 EOF
@@ -212,7 +212,7 @@ EOF
 one:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     run: |
         touch /one
 EOF
@@ -246,7 +246,7 @@ EOF
 one:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
 EOF
 
     stacker recursive-build
@@ -260,11 +260,11 @@ EOF
 same:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
 same:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
 EOF
     bad_stacker build | grep "duplicate layer name"
 }
@@ -274,7 +274,7 @@ EOF
 same:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
 EOF
     cat > b.yaml <<EOF
 config:
diff --git a/test/publish.bats b/test/publish.bats
index 865f69c4..86636acb 100644
--- a/test/publish.bats
+++ b/test/publish.bats
@@ -8,7 +8,7 @@ function setup() {
 layer1:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     import:
         - import1
     run: |
@@ -35,7 +35,7 @@ EOF
 layer3:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     build_only: true
 EOF
     mkdir -p ocibuilds/sub4
@@ -43,7 +43,7 @@ EOF
 layer4:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     run: |
         ls > /root/ls_out
 EOF
diff --git a/test/squashfs.bats b/test/squashfs.bats
index 7da20da5..feed5da9 100644
--- a/test/squashfs.bats
+++ b/test/squashfs.bats
@@ -18,7 +18,7 @@ function teardown() {
 build:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     build_only: true
 importer:
     from:
@@ -32,20 +32,20 @@ EOF
 
 @test "squashfs mutate /usr/bin" {
     cat > stacker.yaml <<EOF
-centos1:
+busybox1:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     run: |
         touch /usr/bin/foo
 EOF
     stacker build --layer-type=squashfs
 
     cat > stacker.yaml <<EOF
-centos2:
+busybox2:
     from:
         type: oci
-        url: oci:centos1-squashfs
+        url: oci:busybox1-squashfs
     run: |
         ls /usr/bin | grep foo
 EOF
@@ -54,10 +54,10 @@ EOF
 
 @test "squashfs import support" {
     cat > stacker.yaml <<EOF
-centos1:
+busybox1:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     run: |
         touch /1
 EOF
@@ -65,10 +65,10 @@ EOF
     mv oci oci-import
 
     cat > stacker.yaml <<EOF
-centos2:
+busybox2:
     from:
         type: oci
-        url: oci-import:centos1-squashfs
+        url: oci-import:busybox1-squashfs
     run: |
         [ -f /1 ]
 EOF
@@ -77,10 +77,10 @@ EOF
 
 @test "squashfs layer support (overlay)" {
     cat > stacker.yaml <<EOF
-centos:
+busybox:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     run: |
         touch /1
 EOF
@@ -93,7 +93,7 @@ EOF
 
     mkdir layer0
     mount -t squashfs oci/blobs/sha256/$layer0 layer0
-    [ -f layer0/bin/bash ]
+    [ -f layer0/bin/sh ]
 
     mkdir layer1
     mount -t squashfs oci/blobs/sha256/$layer1 layer1
@@ -102,10 +102,10 @@ EOF
 
 @test "squashfs file whiteouts (overlay)" {
     cat > stacker.yaml <<EOF
-centos:
+busybox:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     run: |
         rm -rf /etc/selinux
         rm -f /usr/bin/ls
@@ -137,12 +137,12 @@ EOF
 build:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     build_only: true
 importer:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     import:
         - stacker://build/bin/ls
     run: |
@@ -154,16 +154,16 @@ EOF
 @test "built type with squashfs works" {
     mkdir -p .stacker/layer-bases
     chmod 777 .stacker/layer-bases
-    image_copy oci:$CENTOS_OCI oci:.stacker/layer-bases/oci:centos
-    umoci unpack --image .stacker/layer-bases/oci:centos dest
-    tar caf .stacker/layer-bases/centos.tar -C dest/rootfs .
+    image_copy oci:$BUSYBOX_OCI oci:.stacker/layer-bases/oci:busybox
+    umoci unpack --image .stacker/layer-bases/oci:busybox dest
+    tar caf .stacker/layer-bases/busybox.tar -C dest/rootfs .
     rm -rf dest
 
 	cat > stacker.yaml <<EOF
 base:
   from:
     type: tar
-    url: .stacker/layer-bases/centos.tar
+    url: .stacker/layer-bases/busybox.tar
   run: |
     echo "hello world" > /message
 
@@ -191,16 +191,16 @@ EOF
 @test "built type with squashfs build-only base works (overlay)" {
     mkdir -p .stacker/layer-bases
     chmod 777 .stacker/layer-bases
-    image_copy oci:$CENTOS_OCI oci:.stacker/layer-bases/oci:centos
-    umoci unpack --image .stacker/layer-bases/oci:centos dest
-    tar caf .stacker/layer-bases/centos.tar -C dest/rootfs .
+    image_copy oci:$BUSYBOX_OCI oci:.stacker/layer-bases/oci:busybox
+    umoci unpack --image .stacker/layer-bases/oci:busybox dest
+    tar caf .stacker/layer-bases/busybox.tar -C dest/rootfs .
     rm -rf dest
 
 	cat > stacker.yaml <<EOF
 base:
   from:
     type: tar
-    url: .stacker/layer-bases/centos.tar
+    url: .stacker/layer-bases/busybox.tar
   run: |
     echo "hello world" > /message
   build_only: true
diff --git a/test/tmpfs.bats b/test/tmpfs.bats
index 4bca7059..2eb46d78 100644
--- a/test/tmpfs.bats
+++ b/test/tmpfs.bats
@@ -13,7 +13,7 @@ function teardown() {
 test:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     run: |
         echo hello world
 EOF
diff --git a/test/unprivileged.bats b/test/unprivileged.bats
index 40c71592..1db0a475 100644
--- a/test/unprivileged.bats
+++ b/test/unprivileged.bats
@@ -13,14 +13,14 @@ function teardown() {
 parent:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     run: |
         touch /etc/000
         chmod 000 /etc/000
 child:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     run: |
         echo "zomg" > /etc/000
         chmod 000 /etc/000
@@ -38,10 +38,10 @@ EOF
 
 @test "unprivileged stacker" {
     cat > stacker.yaml <<EOF
-centos:
+busybox:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     import:
         - https://www.cisco.com/favicon.ico
     run: |
@@ -49,13 +49,13 @@ centos:
 layer1:
     from:
         type: built
-        tag: centos
+        tag: busybox
     run:
         - rm /favicon.ico
 EOF
     stacker build
-    umoci unpack --image oci:centos centos
-    [ "$(sha .stacker/imports/centos/favicon.ico)" == "$(sha centos/rootfs/favicon.ico)" ]
+    umoci unpack --image oci:busybox busybox
+    [ "$(sha .stacker/imports/busybox/favicon.ico)" == "$(sha busybox/rootfs/favicon.ico)" ]
     umoci unpack --image oci:layer1 layer1
     [ ! -f layer1/rootfs/favicon.ico ]
 }
@@ -70,10 +70,10 @@ chmod -w import
 EOF
 
     cat > stacker.yaml <<EOF
-centos:
+busybox:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     import:
         - import
 EOF
@@ -95,7 +95,7 @@ EOF
 base:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     import:
         - first
         - second
@@ -125,7 +125,7 @@ EOF
 base:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
     import:
         - test
     run: cat /stacker/imports/test
@@ -145,7 +145,7 @@ EOF
 image:
     from:
         type: oci
-        url: $CENTOS_OCI
+        url: $BUSYBOX_OCI
 EOF
 
     stacker build --layer-type squashfs
@@ -154,6 +154,6 @@ EOF
 
     mkdir layer0
     mount -t squashfs oci/blobs/sha256/$layer0 layer0
-    echo "mount has uid $(stat --format "%u" layer0/usr/bin/mount)"
-    [ "$(stat --format "%u" layer0/usr/bin/mount)" = "0" ]
+    echo "mount has uid $(stat --format "%u" layer0/bin/mount)"
+    [ "$(stat --format "%u" layer0/bin/mount)" = "0" ]
 }