diff --git a/Makefile b/Makefile
index bd77980f4..69ec92940 100644
--- a/Makefile
+++ b/Makefile
@@ -19,9 +19,10 @@ GO111MODULE_VALUE=auto
 PREFIX ?= out/
 
 CMD=containerd-stargz-grpc ctr-remote
-
 CMD_BINARIES=$(addprefix $(PREFIX),$(CMD))
 
+OUT_POSIX=out-posix
+
 .PHONY: all build check install-check-tools install uninstall clean test test-root test-all integration test-optimize benchmark test-pullsecrets test-cri
 
 all: build
@@ -61,6 +62,7 @@ uninstall:
 clean:
 	@echo "$@"
 	@rm -f $(CMD_BINARIES)
+	@rm -f $(OUT_POSIX)
 
 test:
 	@echo "$@"
@@ -86,3 +88,6 @@ test-pullsecrets:
 
 test-cri:
 	@./script/cri/test.sh
+
+test-posix:
+	@./script/posix/test.sh
\ No newline at end of file
diff --git a/script/posix/Dockerfile b/script/posix/Dockerfile
new file mode 100644
index 000000000..43b803aa9
--- /dev/null
+++ b/script/posix/Dockerfile
@@ -0,0 +1,33 @@
+#   Copyright The containerd Authors.
+
+#   Licensed under the Apache License, Version 2.0 (the "License");
+#   you may not use this file except in compliance with the License.
+#   You may obtain a copy of the License at
+
+#       http://www.apache.org/licenses/LICENSE-2.0
+
+#   Unless required by applicable law or agreed to in writing, software
+#   distributed under the License is distributed on an "AS IS" BASIS,
+#   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#   See the License for the specific language governing permissions and
+#   limitations under the License.
+
+FROM golang:1.13
+
+# basic packages
+RUN apt-get update -y && \
+    apt-get --no-install-recommends install -y libbtrfs-dev libseccomp-dev fuse \
+                       apt-transport-https gnupg2 software-properties-common
+
+# runtime dependencies
+RUN git clone https://github.com/opencontainers/runc \
+              $GOPATH/src/github.com/opencontainers/runc && \
+    cd $GOPATH/src/github.com/opencontainers/runc && \
+    git checkout d736ef14f0288d6993a1845745d6756cfc9ddd5a && \
+    GO111MODULE=off make BUILDTAGS='seccomp apparmor' && \
+    GO111MODULE=off make install && \
+    git clone https://github.com/containerd/containerd \
+              $GOPATH/src/github.com/containerd/containerd && \
+    cd $GOPATH/src/github.com/containerd/containerd && \
+    git checkout 990076b731ec9446437972b41176a6b0f3b7bcbf && \
+    GO111MODULE=off make && GO111MODULE=off make install
diff --git a/script/posix/config/config.containerd.toml b/script/posix/config/config.containerd.toml
new file mode 100644
index 000000000..32f99b120
--- /dev/null
+++ b/script/posix/config/config.containerd.toml
@@ -0,0 +1,4 @@
+[proxy_plugins]
+  [proxy_plugins.stargz]
+    type = "snapshot"
+    address = "/run/containerd-stargz-grpc/containerd-stargz-grpc.sock"
diff --git a/script/posix/config/config.stargz.toml b/script/posix/config/config.stargz.toml
new file mode 100644
index 000000000..ba4384789
--- /dev/null
+++ b/script/posix/config/config.stargz.toml
@@ -0,0 +1 @@
+noprefetch = false
diff --git a/script/posix/pjdfstest/Dockerfile b/script/posix/pjdfstest/Dockerfile
new file mode 100644
index 000000000..3b8e653b0
--- /dev/null
+++ b/script/posix/pjdfstest/Dockerfile
@@ -0,0 +1,13 @@
+FROM alpine:3.9 AS stage-build
+WORKDIR /work
+RUN apk add git automake autoconf build-base && \
+    git clone https://github.com/pjd/pjdfstest.git /work/pjdfstest && \
+    cd /work/pjdfstest && \
+    git checkout a75ea1caf843a3a1e6c866b61bf954f68cee4a85 && \
+    autoreconf -ifs && ./configure && make pjdfstest
+
+FROM alpine:3.9 AS stage-final
+WORKDIR /work
+COPY --from=stage-build /work/pjdfstest /work/pjdfstest
+RUN apk add openssl perl-test-harness-utils
+CMD ["prove", "-rv", "/work/pjdfstest/tests"]
\ No newline at end of file
diff --git a/script/posix/run.sh b/script/posix/run.sh
new file mode 100755
index 000000000..ded1d9168
--- /dev/null
+++ b/script/posix/run.sh
@@ -0,0 +1,90 @@
+#!/bin/bash
+
+#   Copyright The containerd Authors.
+
+#   Licensed under the Apache License, Version 2.0 (the "License");
+#   you may not use this file except in compliance with the License.
+#   You may obtain a copy of the License at
+
+#       http://www.apache.org/licenses/LICENSE-2.0
+
+#   Unless required by applicable law or agreed to in writing, software
+#   distributed under the License is distributed on an "AS IS" BASIS,
+#   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#   See the License for the specific language governing permissions and
+#   limitations under the License.
+
+set -euo pipefail
+
+# Check Dockerfile at script/posix/Dockerfile
+IMAGE_PJDFSTEST="${IMAGE_PJDFSTEST:-docker.io/sequix/pjdfstest:v1-stargz}"
+CONTEXT="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )"
+
+function retry {
+    local RETRYNUM=30
+    local RETRYINTERVAL=1
+    local TIMEOUTSEC=180
+    local SUCCESS=false
+    for i in $(seq ${RETRYNUM}) ; do
+        if eval "timeout ${TIMEOUTSEC} ${@}" ; then
+            SUCCESS=true
+            break
+        fi
+        echo "Fail(${i}). Retrying..."
+        sleep ${RETRYINTERVAL}
+    done
+    if [ "${SUCCESS}" == "true" ] ; then
+        return 0
+    else
+        return 1
+    fi
+}
+
+specList() {
+    uname -r
+    cat /etc/os-release
+    cat /proc/cpuinfo
+    cat /proc/meminfo
+    mount
+    df -T
+}
+echo "Machine spec list:"
+specList
+
+setup() {
+    local REPO_CONFIG_DIR=$CONTEXT/config/
+    local CONTAINERD_CONFIG_DIR=/etc/containerd/
+    local REMOTE_SNAPSHOTTER_SOCKET=/run/containerd-stargz-grpc/containerd-stargz-grpc.sock
+    local REMOTE_SNAPSHOTTER_CONFIG_DIR=/etc/containerd-stargz-grpc/
+
+    mkdir -p /tmp/out
+    PREFIX=/tmp/out/ make clean
+    PREFIX=/tmp/out/ make -j2
+    PREFIX=/tmp/out/ make install
+    mkdir -p "${CONTAINERD_CONFIG_DIR}"
+    cp "${REPO_CONFIG_DIR}"config.containerd.toml "${CONTAINERD_CONFIG_DIR}"
+    mkdir -p "${REMOTE_SNAPSHOTTER_CONFIG_DIR}"
+    cp "${REPO_CONFIG_DIR}"config.stargz.toml "${REMOTE_SNAPSHOTTER_CONFIG_DIR}"
+
+    containerd-stargz-grpc --log-level=debug \
+        --address="${REMOTE_SNAPSHOTTER_SOCKET}" \
+        --config="${REMOTE_SNAPSHOTTER_CONFIG_DIR}config.stargz.toml" \
+        &>/var/log/containerd-stargz-grpc.log &
+    retry ls "${REMOTE_SNAPSHOTTER_SOCKET}"
+
+    containerd --log-level debug \
+        --config="${CONTAINERD_CONFIG_DIR}config.containerd.toml" \
+        &>/var/log/containerd.log &
+    retry ctr version
+}
+echo "Setting up stargz-snaphsotter & containerd..."
+setup
+
+testPosix() {
+    local containerID="posix-test_$(basename $(mktemp))"
+    ctr-remote image rpull "$IMAGE_PJDFSTEST"
+    ctr-remote run --rm --snapshotter=stargz "$IMAGE_PJDFSTEST" "$containerID" >/output || \
+        echo -e "\e[91mPosix test failed!\e[0m"
+}
+echo "Testing posix calls..."
+testPosix
diff --git a/script/posix/test.sh b/script/posix/test.sh
new file mode 100755
index 000000000..c357a0cbd
--- /dev/null
+++ b/script/posix/test.sh
@@ -0,0 +1,75 @@
+#!/bin/bash
+
+#   Copyright The containerd Authors.
+
+#   Licensed under the Apache License, Version 2.0 (the "License");
+#   you may not use this file except in compliance with the License.
+#   You may obtain a copy of the License at
+
+#       http://www.apache.org/licenses/LICENSE-2.0
+
+#   Unless required by applicable law or agreed to in writing, software
+#   distributed under the License is distributed on an "AS IS" BASIS,
+#   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#   See the License for the specific language governing permissions and
+#   limitations under the License.
+
+set -euo pipefail
+
+cleanup() {
+    local ORG_EXIT_CODE="${1}"
+    rm "${DOCKER_COMPOSE_YAML}" || true
+    exit "${ORG_EXIT_CODE}"
+}
+trap 'cleanup "$?"' EXIT SIGHUP SIGINT SIGQUIT SIGTERM
+
+CONTEXT="$( cd "$( dirname "${BASH_SOURCE[0]}" )" >/dev/null 2>&1 && pwd )/"
+REPO="${CONTEXT}../../"
+
+echo "Preparing docker-compose.yml..."
+DOCKER_COMPOSE_YAML=$(mktemp)
+BENCHMARKING_NODE=posix-test
+BENCHMARKING_CONTAINER=posix-test
+cat <<EOF > "${DOCKER_COMPOSE_YAML}"
+version: "3"
+services:
+  ${BENCHMARKING_NODE}:
+    build:
+      context: "${CONTEXT}/"
+      dockerfile: Dockerfile
+    container_name: ${BENCHMARKING_CONTAINER}
+    privileged: true
+    working_dir: /go/src/github.com/containerd/stargz-snapshotter
+    command: tail -f /dev/null
+    environment:
+    - NO_PROXY=127.0.0.1,localhost
+    - HTTP_PROXY=${HTTP_PROXY:-}
+    - HTTPS_PROXY=${HTTPS_PROXY:-}
+    - http_proxy=${http_proxy:-}
+    - https_proxy=${https_proxy:-}
+    tmpfs:
+    - /tmp:exec,mode=777
+    volumes:
+    - "${REPO}:/go/src/github.com/containerd/stargz-snapshotter:ro"
+    - "/dev/fuse:/dev/fuse"
+    - "containerd-data:/var/lib/containerd:delegated"
+    - "containerd-stargz-grpc-data:/var/lib/containerd-stargz-grpc:delegated"
+    - "containerd-stargz-grpc-status:/run/containerd-stargz-grpc:delegated"
+volumes:
+  containerd-data:
+  containerd-stargz-grpc-data:
+  containerd-stargz-grpc-status:
+EOF
+
+echo "Setup posix test environment..."
+docker-compose -f "${DOCKER_COMPOSE_YAML}" build ${DOCKER_BUILD_ARGS:-} "${BENCHMARKING_NODE}"
+docker-compose -f "${DOCKER_COMPOSE_YAML}" up -d --force-recreate
+
+echo "Posix testing..."
+docker exec -i "${BENCHMARKING_CONTAINER}" script/posix/run.sh
+
+echo "Harvesting output..."
+docker cp "${BENCHMARKING_CONTAINER}:/output" "${REPO}/out-posix"
+
+echo "Cleaning up benchmark environment..."
+docker-compose -f "${DOCKER_COMPOSE_YAML}" down -v