diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b045ba9..5aa1290 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -20,6 +20,8 @@ jobs:
       -
         name: Checkout
         uses: actions/checkout@v2.3.3
+        with:
+          path: action
       -
         name: Set up QEMU
         uses: docker/setup-qemu-action@v1
@@ -35,7 +37,7 @@ jobs:
       -
         name: Build and push
         id: docker_build
-        uses: ./
+        uses: ./action
         with:
           file: ./test/Dockerfile
           builder: ${{ steps.buildx.outputs.name }}
@@ -67,6 +69,8 @@ jobs:
       -
         name: Checkout
         uses: actions/checkout@v2.3.3
+        with:
+          path: action
       -
         name: Set up QEMU
         uses: docker/setup-qemu-action@v1
@@ -82,7 +86,7 @@ jobs:
       -
         name: Build and push
         id: docker_build
-        uses: ./
+        uses: ./action
         with:
           file: ./test/Dockerfile
           builder: ${{ steps.buildx.outputs.name }}
@@ -215,8 +219,155 @@ jobs:
         if: always()
         uses: crazy-max/ghaction-dump-context@v1
 
-  github-cache:
+  registry-cache:
     runs-on: ubuntu-latest
+    services:
+      registry:
+        image: registry:2
+        ports:
+          - 5000:5000
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v2.3.3
+      -
+        name: Set up QEMU
+        uses: docker/setup-qemu-action@v1
+        with:
+          platforms: all
+      -
+        name: Set up Docker Buildx
+        id: buildx
+        uses: docker/setup-buildx-action@v1
+        with:
+          driver-opts: network=host
+      -
+        name: Build and push (1)
+        id: docker_build
+        uses: ./
+        with:
+          context: ./test
+          file: ./test/Dockerfile-multi
+          builder: ${{ steps.buildx.outputs.name }}
+          platforms: linux/amd64,linux/arm64
+          push: true
+          tags: |
+            localhost:5000/name/app:latest
+            localhost:5000/name/app:1.0.0
+          cache-from: type=registry,ref=localhost:5000/name/app
+          cache-to: type=inline
+      -
+        name: Inspect (1)
+        run: |
+          docker buildx imagetools inspect localhost:5000/name/app:latest
+      -
+        name: Image digest (1)
+        run: echo ${{ steps.docker_build.outputs.digest }}
+      -
+        name: Prune
+        run: |
+          docker buildx prune -a -f --verbose
+      -
+        name: Build and push (2)
+        id: docker_build2
+        uses: ./
+        with:
+          context: ./test
+          file: ./test/Dockerfile-multi
+          builder: ${{ steps.buildx.outputs.name }}
+          platforms: linux/amd64,linux/arm64
+          push: true
+          tags: |
+            localhost:5000/name/app:latest
+            localhost:5000/name/app:1.0.0
+          cache-from: type=registry,ref=localhost:5000/name/app
+          cache-to: type=inline
+      -
+        name: Inspect (2)
+        run: |
+          docker buildx imagetools inspect localhost:5000/name/app:latest
+      -
+        name: Image digest (2)
+        run: echo ${{ steps.docker_build2.outputs.digest }}
+      -
+        name: Check digests
+        run: |
+          echo Compare "${{ steps.docker_build.outputs.digest }}" with "${{ steps.docker_build2.outputs.digest }}"
+          if [ "${{ steps.docker_build.outputs.digest }}" != "${{ steps.docker_build2.outputs.digest }}" ]; then
+            echo "::error::Digests should be identical"
+            exit 1
+          fi
+      -
+        name: Dump context
+        if: always()
+        uses: crazy-max/ghaction-dump-context@v1
+
+  github-cache-first:
+    runs-on: ubuntu-latest
+    outputs:
+      digest: ${{ steps.docker_build.outputs.digest }}
+    services:
+      registry:
+        image: registry:2
+        ports:
+          - 5000:5000
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v2.3.3
+      -
+        name: Set up QEMU
+        uses: docker/setup-qemu-action@v1
+        with:
+          platforms: all
+      -
+        name: Set up Docker Buildx
+        id: buildx
+        uses: docker/setup-buildx-action@v1
+        with:
+          driver-opts: network=host
+      -
+        name: Cache Docker layers
+        uses: actions/cache@v2
+        with:
+          path: /tmp/.buildx-cache
+          key: ${{ runner.os }}-buildx-ghcache-${{ github.sha }}
+          restore-keys: |
+            ${{ runner.os }}-buildx-ghcache-
+      -
+        name: Erase cache
+        run: |
+          rm -rf /tmp/.buildx-cache/*
+      -
+        name: Build and push
+        id: docker_build
+        uses: ./
+        with:
+          context: ./test
+          file: ./test/Dockerfile-multi-golang
+          builder: ${{ steps.buildx.outputs.name }}
+          platforms: linux/amd64,linux/arm64
+          push: true
+          tags: |
+            localhost:5000/name/app:latest
+            localhost:5000/name/app:1.0.0
+          cache-from: type=local,src=/tmp/.buildx-cache
+          cache-to: type=local,dest=/tmp/.buildx-cache
+      -
+        name: Inspect
+        run: |
+          docker buildx imagetools inspect localhost:5000/name/app:1.0.0
+      -
+        name: Image digest
+        run: echo ${{ steps.docker_build.outputs.digest }}
+      -
+        name: Dump context
+        if: always()
+        uses: crazy-max/ghaction-dump-context@v1
+
+  github-cache-hit:
+    runs-on: ubuntu-latest
+    needs: github-cache-first
     services:
       registry:
         image: registry:2
@@ -243,9 +394,9 @@ jobs:
         id: cache
         with:
           path: /tmp/.buildx-cache
-          key: ${{ runner.os }}-buildx-${{ github.sha }}
+          key: ${{ runner.os }}-buildx-ghcache-${{ github.sha }}
           restore-keys: |
-            ${{ runner.os }}-buildx-
+            ${{ runner.os }}-buildx-ghcache-
       -
         name: Build and push
         id: docker_build
@@ -268,6 +419,14 @@ jobs:
       -
         name: Image digest
         run: echo ${{ steps.docker_build.outputs.digest }}
+      -
+        name: Check digests
+        run: |
+          echo Compare "${{ needs.github-cache-first.outputs.digest }}" with "${{ steps.docker_build.outputs.digest }}"
+          if [ "${{ needs.github-cache-first.outputs.digest }}" != "${{ steps.docker_build.outputs.digest }}" ]; then
+            echo "::error::Digests should be identical"
+            exit 1
+          fi
       -
         name: Cache hit
         run: echo ${{ steps.cache.outputs.cache-hit }}
diff --git a/README.md b/README.md
index 0e7e3b4..0342850 100644
--- a/README.md
+++ b/README.md
@@ -54,7 +54,7 @@ build-secrets, remote cache, etc. and different builder deployment/namespacing o
 
 ### Git context
 
-The default behavior of this action is to use the [Git context invoked by your workflow](https://github.com/docker/build-push-action/blob/master/src/context.ts#L10).
+The default behavior of this action is to use the [Git context invoked by your workflow](https://github.com/docker/build-push-action/blob/master/src/context.ts#L10-L12).
 
 ```yaml
 name: ci
@@ -110,6 +110,8 @@ repository, you have to use a secret named `GIT_AUTH_TOKEN` to be able to authen
 > :warning: Subdir for Git context is [not yet supported](https://github.com/docker/build-push-action/issues/120).
 > For the moment you can use the [path context](#path-context).
 
+> More info: https://docs.docker.com/engine/reference/commandline/build/#git-repositories
+
 ### Path context
 
 You can also use the `PATH` context alongside the [`actions/checkout`](https://github.com/actions/checkout/) action.
diff --git a/UPGRADE.md b/UPGRADE.md
index 7f017d9..bda8509 100644
--- a/UPGRADE.md
+++ b/UPGRADE.md
@@ -66,8 +66,8 @@ steps:
       pull: true
       push: true
       build-args: arg1=value1,arg2=value2
-      cache-from: type=registry,ref=myorg/myrepository
-      cache-to: type=registry,ref=myorg/myrepository
+      cache-from: type=registry,ref=myorg/myrepository:latest
+      cache-to: type=inline
       tags: myorg/myrepository:latest
 ```