diff --git a/src/php/docker/php5/Dockerfile b/src/php/docker/php5/Dockerfile
deleted file mode 100644
index a350e7c9b63..00000000000
--- a/src/php/docker/php5/Dockerfile
+++ /dev/null
@@ -1,39 +0,0 @@
-# Copyright 2019 gRPC 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 php:5.6-zts-stretch
-
-RUN apt-get -qq update && apt-get -qq install -y \
-  autoconf automake git libtool pkg-config \
-  valgrind wget zlib1g-dev
-
-ARG MAKEFLAGS=-j8
-
-
-WORKDIR /tmp
-
-RUN wget https://phar.phpunit.de/phpunit-5.7.27.phar && \
-  mv phpunit-5.7.27.phar /usr/local/bin/phpunit && \
-  chmod +x /usr/local/bin/phpunit
-
-
-WORKDIR /github/grpc
-
-COPY . .
-
-RUN pear package && \
-  find . -name grpc-*.tgz | xargs -I{} pecl install {}
-
-
-CMD ["/github/grpc/src/php/bin/run_tests.sh", "--skip-persistent-channel-tests"]