diff --git a/.github/workflows/pull-request-validation.yml b/.github/workflows/pull-request-validation.yml
new file mode 100644
index 00000000..c6983d72
--- /dev/null
+++ b/.github/workflows/pull-request-validation.yml
@@ -0,0 +1,12 @@
+name: PR
+on: pull_request
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v2
+
+    - name: Test with dapper
+      run: |
+        make pr-validation
diff --git a/Dockerfile.dapper b/Dockerfile.dapper
index b3c80b16..ac412295 100644
--- a/Dockerfile.dapper
+++ b/Dockerfile.dapper
@@ -96,6 +96,7 @@ ARG USER_DOCKER_ENGINE_VERSION=docker-${USER_DOCKER_VERSION}
 
 ARG AZURE_SERVICE=false
 ARG PROXMOXVE_SERVICE=false
+ARG SKIP_BUILD=false
 ######################################################
 
 # Set up environment and export all ARGS as ENV
@@ -138,7 +139,8 @@ ENV BUILD_DOCKER_URL=BUILD_DOCKER_URL_${ARCH} \
     USER_DOCKER_VERSION=${USER_DOCKER_VERSION} \
     USER_DOCKER_ENGINE_VERSION=${USER_DOCKER_ENGINE_VERSION} \
     AZURE_SERVICE=${AZURE_SERVICE} \
-    PROXMOXVE_SERVICE=${PROXMOXVE_SERVICE}
+    PROXMOXVE_SERVICE=${PROXMOXVE_SERVICE} \
+    SKIP_BUILD=${SKIP_BUILD}
 ENV PATH=${GOPATH}/bin:/usr/local/go/bin:$PATH
 
 RUN mkdir -p ${DOWNLOADS}
@@ -146,8 +148,8 @@ RUN mkdir -p ${DOWNLOADS}
 # Download kernel
 RUN rm /bin/sh && ln -s /bin/bash /bin/sh
 RUN echo "... Downloading  ${!KERNEL_URL}"; \
-    if [ -n "${!KERNEL_URL}" ]; then \
-        curl -fL ${!KERNEL_URL} > ${DOWNLOADS}/kernel.tar.xz \
+    if [ "${!KERNEL_URL}" != "skip" ]; then \
+        curl -fL ${!KERNEL_URL} > ${DOWNLOADS}/kernel.tar.gz \
     ;fi
 
 # Download SELinux Policy
diff --git a/Makefile b/Makefile
index 45cce022..fcdcd6f8 100755
--- a/Makefile
+++ b/Makefile
@@ -10,6 +10,12 @@ TARGETS := $(shell ls scripts | grep -vE 'clean|run|help|release*|build-moby|run
 $(TARGETS): .dapper
 	./.dapper $@
 
+pr-validation: .dapper
+	ARCH="amd64" \
+	KERNEL_URL_amd64="skip" \
+	SKIP_BUILD="true" \
+	./.dapper ci
+
 trash: .dapper
 	./.dapper -m bind trash
 
diff --git a/scripts/ci b/scripts/ci
index ca5d68f7..eff0c0d4 100755
--- a/scripts/ci
+++ b/scripts/ci
@@ -3,8 +3,10 @@ set -ex
 
 cd $(dirname $0)/..
 
-echo BUILD
-./scripts/build
+if [ "$SKIP_BUILD" == "false" ]; then
+    echo BUILD
+    ./scripts/build
+fi
 echo TEST
 ./scripts/test
 echo VALIDATE
diff --git a/scripts/layout-kernel b/scripts/layout-kernel
index 89102dfa..c57b7f74 100755
--- a/scripts/layout-kernel
+++ b/scripts/layout-kernel
@@ -2,14 +2,14 @@
 set -e
 
 # Override using a local kernel build
-if [ -e ${DAPPER_SOURCE}/assets/kernel.tar.xz ]; then
-    echo "copying ${DAPPER_SOURCE}/assets/kernel.tar.xz ${DOWNLOADS}/kernel.tar.xz"
-    cp ${DAPPER_SOURCE}/assets/kernel.tar.xz ${DOWNLOADS}/kernel.tar.xz
+if [ -e ${DAPPER_SOURCE}/assets/kernel.tar.gz ]; then
+    echo "copying ${DAPPER_SOURCE}/assets/kernel.tar.gz ${DOWNLOADS}/kernel.tar.gz"
+    cp ${DAPPER_SOURCE}/assets/kernel.tar.gz ${DOWNLOADS}/kernel.tar.gz
 fi
 
-if [ -e ${DOWNLOADS}/kernel.tar.xz ]; then
+if [ -e ${DOWNLOADS}/kernel.tar.gz ]; then
     mkdir -p ${BUILD}/kernel
-    tar Jxf ${DOWNLOADS}/kernel.tar.xz -C ${BUILD}/kernel
+    tar xf ${DOWNLOADS}/kernel.tar.gz -C ${BUILD}/kernel
 
     for i in vmlinuz vmlinux; do
         if [ -e ${BUILD}/kernel/boot/${i}-* ]; then
@@ -51,7 +51,7 @@ if [ -e ${DOWNLOADS}/kernel.tar.xz ]; then
     fi
 else
     if [ "$ARCH" == "amd64" ]; then
-        echo "no ${DOWNLOADS}/kernel.tar.xz found"
+        echo "no ${DOWNLOADS}/kernel.tar.gz found"
         exit 1
     fi
 fi