diff --git a/.dockerignore b/.dockerignore
index 3c3629e6..ccc29308 100644
--- a/.dockerignore
+++ b/.dockerignore
@@ -1 +1,2 @@
-node_modules
+/coverage
+/node_modules
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index f9e9d40e..d877164a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -44,12 +44,14 @@ jobs:
         with:
           version: ${{ matrix.version }}
           args: check --debug
+          workdir: ./test
       -
         name: GoReleaser
         uses: ./
         with:
           version: ${{ matrix.version }}
           args: release --skip-publish --rm-dist
+          workdir: ./test
 
   install-only:
     runs-on: ubuntu-latest
@@ -115,6 +117,7 @@ jobs:
         with:
           version: latest
           args: -f .goreleaser-signing.yml check --debug
+          workdir: ./test
         env:
           GPG_FINGERPRINT: ${{ steps.import_gpg.outputs.fingerprint }}
       -
@@ -123,6 +126,7 @@ jobs:
         with:
           version: latest
           args: -f .goreleaser-signing.yml release --skip-publish --rm-dist
+          workdir: ./test
         env:
           GPG_FINGERPRINT: ${{ steps.import_gpg.outputs.fingerprint }}
 
@@ -144,11 +148,13 @@ jobs:
         uses: ./
         with:
           args: check --debug
+          workdir: ./test
       -
         name: GoReleaser
         uses: ./
         with:
           args: release --skip-publish --rm-dist
+          workdir: ./test
       -
         name: Upload assets
         uses: actions/upload-artifact@v2
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 560a1157..93790e95 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -3,55 +3,32 @@ name: test
 on:
   push:
     branches:
-      - master
-      - releases/v*
-    paths-ignore:
-      - '**.md'
+      - 'master'
+      - 'releases/v*'
   pull_request:
-    paths-ignore:
-      - '**.md'
+    branches:
+      - 'master'
+      - 'releases/v*'
 
 jobs:
-  test-containerized:
+  test:
     runs-on: ubuntu-latest
     steps:
       -
         name: Checkout
         uses: actions/checkout@v2
-        with:
-          fetch-depth: 0
       -
         name: Validate
-        run: docker buildx bake validate
-      -
-        name: Test
-        run: docker buildx bake test
-
-  test:
-    runs-on: ${{ matrix.os }}
-    strategy:
-      fail-fast: false
-      matrix:
-        os:
-          - ubuntu-latest
-          - macOS-latest
-          - windows-latest
-    steps:
-      -
-        name: Checkout
-        uses: actions/checkout@v2
+        uses: docker/bake-action@v1
         with:
-          fetch-depth: 0
-      -
-        name: Install
-        run: yarn install
+          targets: validate
       -
         name: Test
-        run: yarn run test
+        uses: docker/bake-action@v1
+        with:
+          targets: test
       -
         name: Upload coverage
         uses: codecov/codecov-action@v1
-        if: success()
         with:
-          token: ${{ secrets.CODECOV_TOKEN }}
           file: ./coverage/clover.xml
diff --git a/dev.Dockerfile b/dev.Dockerfile
deleted file mode 100644
index 74fa10a0..00000000
--- a/dev.Dockerfile
+++ /dev/null
@@ -1,46 +0,0 @@
-#syntax=docker/dockerfile:1.2
-
-FROM node:12 AS deps
-WORKDIR /src
-COPY package.json yarn.lock ./
-RUN --mount=type=cache,target=/usr/local/share/.cache/yarn \
-  yarn install
-
-FROM scratch AS update-yarn
-COPY --from=deps /src/yarn.lock /
-
-FROM deps AS validate-yarn
-COPY .git .git
-RUN status=$(git status --porcelain -- yarn.lock); if [ -n "$status" ]; then echo $status; exit 1; fi
-
-FROM deps AS base
-COPY . .
-
-FROM base AS build
-RUN yarn build
-
-FROM deps AS test
-ARG TARGETOS
-ARG TARGETARCH
-ENV RUNNER_TEMP=/tmp/github_runner
-ENV RUNNER_TOOL_CACHE=/tmp/github_tool_cache
-COPY . .
-RUN yarn run test
-
-FROM base AS run-format
-RUN yarn run format
-
-FROM scratch AS format
-COPY --from=run-format /src/src/*.ts /src/
-
-FROM base AS validate-format
-RUN yarn run format-check
-
-FROM scratch AS dist
-COPY --from=build /src/dist/ /dist/
-
-FROM build AS validate-build
-RUN status=$(git status --porcelain -- dist); if [ -n "$status" ]; then echo $status; exit 1; fi
-
-FROM base AS dev
-ENTRYPOINT ["bash"]
diff --git a/docker-bake.hcl b/docker-bake.hcl
index 11871f5c..7054cf77 100644
--- a/docker-bake.hcl
+++ b/docker-bake.hcl
@@ -1,53 +1,67 @@
-group "default" {
-  targets = ["build"]
+variable "NODE_VERSION" {
+  default = "12"
 }
 
-group "pre-checkin" {
-  targets = ["update-yarn", "format", "build"]
+target "node-version" {
+  args = {
+    NODE_VERSION = NODE_VERSION
+  }
 }
 
-group "validate" {
-  targets = ["validate-format", "validate-build", "validate-yarn"]
+group "default" {
+  targets = ["build"]
 }
 
-target "dockerfile" {
-  dockerfile = "dev.Dockerfile"
+group "pre-checkin" {
+  targets = ["vendor-update", "format", "build"]
 }
 
-target "update-yarn" {
-  inherits = ["dockerfile"]
-  target = "update-yarn"
-  output = ["."]
+group "validate" {
+  targets = ["format-validate", "build-validate", "vendor-validate"]
 }
 
 target "build" {
-  inherits = ["dockerfile"]
-  target = "dist"
+  inherits = ["node-version"]
+  dockerfile = "./hack/build.Dockerfile"
+  target = "build-update"
   output = ["."]
 }
 
-target "test" {
-  inherits = ["dockerfile"]
-  target = "test"
+target "build-validate" {
+  inherits = ["node-version"]
+  dockerfile = "./hack/build.Dockerfile"
+  target = "build-validate"
 }
 
 target "format" {
-  inherits = ["dockerfile"]
-  target = "format"
+  inherits = ["node-version"]
+  dockerfile = "./hack/build.Dockerfile"
+  target = "format-update"
   output = ["."]
 }
 
-target "validate-format" {
-  inherits = ["dockerfile"]
-  target = "validate-format"
+target "format-validate" {
+  inherits = ["node-version"]
+  dockerfile = "./hack/build.Dockerfile"
+  target = "format-validate"
 }
 
-target "validate-build" {
-  inherits = ["dockerfile"]
-  target = "validate-build"
+target "vendor-update" {
+  inherits = ["node-version"]
+  dockerfile = "./hack/vendor.Dockerfile"
+  target = "update"
+  output = ["."]
 }
 
-target "validate-yarn" {
-  inherits = ["dockerfile"]
-  target = "validate-yarn"
+target "vendor-validate" {
+  inherits = ["node-version"]
+  dockerfile = "./hack/vendor.Dockerfile"
+  target = "validate"
+}
+
+target "test" {
+  inherits = ["node-version"]
+  dockerfile = "./hack/test.Dockerfile"
+  target = "test-coverage"
+  output = ["./coverage"]
 }
diff --git a/hack/build.Dockerfile b/hack/build.Dockerfile
new file mode 100644
index 00000000..a0796d71
--- /dev/null
+++ b/hack/build.Dockerfile
@@ -0,0 +1,42 @@
+# syntax=docker/dockerfile:1.2
+ARG NODE_VERSION
+
+FROM node:${NODE_VERSION}-alpine AS base
+RUN apk add --no-cache cpio findutils git
+WORKDIR /src
+
+FROM base AS deps
+RUN --mount=type=bind,target=.,rw \
+  --mount=type=cache,target=/src/node_modules \
+  yarn install
+
+FROM deps AS build
+RUN --mount=type=bind,target=.,rw \
+  --mount=type=cache,target=/src/node_modules \
+  yarn run build && mkdir /out && cp -Rf dist /out/
+
+FROM scratch AS build-update
+COPY --from=build /out /
+
+FROM build AS build-validate
+RUN --mount=type=bind,target=.,rw \
+  git add -A && cp -rf /out/* .; \
+  if [ -n "$(git status --porcelain -- dist)" ]; then \
+    echo >&2 'ERROR: Build result differs. Please build first with "docker buildx bake build"'; \
+    git status --porcelain -- dist; \
+    exit 1; \
+  fi
+
+FROM deps AS format
+RUN --mount=type=bind,target=.,rw \
+  --mount=type=cache,target=/src/node_modules \
+  yarn run format \
+  && mkdir /out && find . -name '*.ts' -not -path './node_modules/*' | cpio -pdm /out
+
+FROM scratch AS format-update
+COPY --from=format /out /
+
+FROM deps AS format-validate
+RUN --mount=type=bind,target=.,rw \
+  --mount=type=cache,target=/src/node_modules \
+  yarn run format-check \
diff --git a/hack/test.Dockerfile b/hack/test.Dockerfile
new file mode 100644
index 00000000..06c5d678
--- /dev/null
+++ b/hack/test.Dockerfile
@@ -0,0 +1,21 @@
+# syntax=docker/dockerfile:1.2
+ARG NODE_VERSION
+
+FROM node:${NODE_VERSION}-alpine AS base
+RUN apk add --no-cache git
+WORKDIR /src
+
+FROM base AS deps
+RUN --mount=type=bind,target=.,rw \
+  --mount=type=cache,target=/src/node_modules \
+  yarn install
+
+FROM deps AS test
+ENV RUNNER_TEMP=/tmp/github_runner
+ENV RUNNER_TOOL_CACHE=/tmp/github_tool_cache
+RUN --mount=type=bind,target=.,rw \
+  --mount=type=cache,target=/src/node_modules \
+  yarn run test --coverageDirectory=/tmp/coverage
+
+FROM scratch AS test-coverage
+COPY --from=test /tmp/coverage /
diff --git a/hack/vendor.Dockerfile b/hack/vendor.Dockerfile
new file mode 100644
index 00000000..dd7906bc
--- /dev/null
+++ b/hack/vendor.Dockerfile
@@ -0,0 +1,23 @@
+# syntax=docker/dockerfile:1.2
+ARG NODE_VERSION
+
+FROM node:${NODE_VERSION}-alpine AS base
+RUN apk add --no-cache git
+WORKDIR /src
+
+FROM base AS vendored
+RUN --mount=type=bind,target=.,rw \
+  --mount=type=cache,target=/src/node_modules \
+  yarn install && mkdir /out && cp yarn.lock /out
+
+FROM scratch AS update
+COPY --from=vendored /out /
+
+FROM vendored AS validate
+RUN --mount=type=bind,target=.,rw \
+  git add -A && cp -rf /out/* .; \
+  if [ -n "$(git status --porcelain -- yarn.lock)" ]; then \
+    echo >&2 'ERROR: Vendor result differs. Please vendor your package with "docker buildx bake vendor-update"'; \
+    git status --porcelain -- yarn.lock; \
+    exit 1; \
+  fi
diff --git a/jest.config.js b/jest.config.js
index 3d7a3786..67eaa307 100644
--- a/jest.config.js
+++ b/jest.config.js
@@ -8,7 +8,7 @@ module.exports = {
   testEnvironment: 'node',
   testMatch: ['**/*.test.ts'],
   testRunner: 'jest-circus/runner',
-  testTimeout: 10000,
+  testTimeout: 30000,
   transform: {
     '^.+\\.ts$': 'ts-jest'
   },
diff --git a/.goreleaser-signing.yml b/test/.goreleaser-signing.yml
similarity index 100%
rename from .goreleaser-signing.yml
rename to test/.goreleaser-signing.yml
diff --git a/.goreleaser.yml b/test/.goreleaser.yml
similarity index 100%
rename from .goreleaser.yml
rename to test/.goreleaser.yml
diff --git a/go.mod b/test/go.mod
similarity index 100%
rename from go.mod
rename to test/go.mod
diff --git a/main.go b/test/main.go
similarity index 100%
rename from main.go
rename to test/main.go