diff --git a/.github/workflows/image.yml b/.github/workflows/image.yml
index 112425e..a1e3f1e 100644
--- a/.github/workflows/image.yml
+++ b/.github/workflows/image.yml
@@ -12,7 +12,7 @@ jobs:
     strategy:
       matrix:
         wp_version: ['6.0', '6.1', '6.2', '6.3', '6.4', '6.5', '6.6', '6.7', '6.8']
-        php_version: ['8.0', '8.1', '8.2', '8.3']
+        php_version: ['7.4', '8.0', '8.1', '8.2', '8.3']
     steps:
       -
         name: Checkout
@@ -41,6 +41,6 @@ jobs:
           push: ${{ github.ref == 'refs/heads/master' }}
           tags: |
             humanmade/plugin-tester:wp-${{ matrix.wp_version }}-php${{ matrix.php_version }}
-            ${{ matrix.php_version == '8.0' && format('humanmade/plugin-tester:wp-{0}', matrix.wp_version) || '' }}
-            ${{ matrix.php_version == '8.0' && matrix.wp_version == '6.8' && 'humanmade/plugin-tester:latest' || '' }}
+            ${{ matrix.php_version == '7.4' && format('humanmade/plugin-tester:wp-{0}', matrix.wp_version) || '' }}
+            ${{ matrix.php_version == '7.4' && matrix.wp_version == '6.8' && 'humanmade/plugin-tester:latest' || '' }}
 
diff --git a/Dockerfile.php7.4 b/Dockerfile.php7.4
new file mode 100644
index 0000000..8e707cd
--- /dev/null
+++ b/Dockerfile.php7.4
@@ -0,0 +1,51 @@
+FROM public.ecr.aws/docker/library/alpine:3.13
+
+ARG WP_VERSION
+
+RUN apk add -u --no-cache \
+	composer \
+	curl \
+	git \
+	imagemagick \
+	mysql \
+	mysql-client \
+	php7 \
+	php7-curl \
+	php7-dom \
+	php7-exif \
+	php7-mysqli \
+	php7-pecl-imagick \
+	php7-simplexml \
+	php7-tokenizer \
+	php7-xml \
+	php7-xmlwriter
+
+RUN apk add --no-cache php7-pear php7-dev gcc musl-dev make \
+	&& pecl7 install pcov && echo extension=pcov.so > /etc/php7/conf.d/pcov.ini \
+	&& apk del php7-pear php7-dev gcc musl-dev make
+
+# Create php symlink to php7
+RUN ln -sf /usr/bin/php7 /usr/bin/php
+
+RUN curl -fsSL -o /tmp/wordpress.tar.gz https://wordpress.org/wordpress-${WP_VERSION}.tar.gz \
+	&& mkdir /wordpress \
+	&& tar --strip-components=1 -zxmf /tmp/wordpress.tar.gz -C /wordpress \
+	&& rm /tmp/wordpress.tar.gz
+
+RUN curl -fsSL -o /tmp/wp-phpunit.tar.gz https://github.com/wp-phpunit/wp-phpunit/archive/${WP_VERSION}.0.tar.gz \
+	&& mkdir /wp-phpunit \
+	&& tar --strip-components=1 -zxmf /tmp/wp-phpunit.tar.gz -C /wp-phpunit \
+	&& rm /tmp/wp-phpunit.tar.gz
+
+RUN mysql_install_db --user=mysql --ldata=/var/lib/mysql
+RUN sh -c 'mysqld_safe --datadir=/var/lib/mysql &' && sleep 4 && mysql -u root -e "CREATE DATABASE wordpress"
+
+ENV WP_DEVELOP_DIR=/wp-phpunit
+ENV WP_PHPUNIT__TESTS_CONFIG=/wp-tests-config.php
+
+VOLUME ["/code"]
+WORKDIR /code
+COPY ./docker-entrypoint.sh /entrypoint.sh
+COPY ./wp-tests-config.php /wp-tests-config.php
+RUN chmod 755 /entrypoint.sh
+ENTRYPOINT ["/entrypoint.sh"]
\ No newline at end of file
diff --git a/README.md b/README.md
index 07a5f1b..dae4249 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,7 @@
 
 Simple Docker image for running unit tests for WordPress plugins.
 
-**Supports multiple PHP versions:** 8.0, 8.1, 8.2, 8.3
+**Supports multiple PHP versions:** 7.4, 8.0, 8.1, 8.2, 8.3
 
 To run the tests for your plugin, run this in your plugin directory:
 
@@ -19,18 +19,18 @@ docker run --rm -v "$PWD:/code" humanmade/plugin-tester:wp-6.8-php8.3
 ```
 
 Available tags follow the pattern `wp-{version}-php{version}`, e.g.:
-- `humanmade/plugin-tester:wp-6.8-php8.3`
+- `humanmade/plugin-tester:wp-6.8-php7.4`
 - `humanmade/plugin-tester:wp-6.7-php8.2` 
 - `humanmade/plugin-tester:wp-6.6-php8.1`
 - etc.
 
-WordPress-only tags are also available (defaulting to PHP 8.0):
+WordPress-only tags are also available (defaulting to PHP 7.4):
 - `humanmade/plugin-tester:wp-6.8`
 - `humanmade/plugin-tester:wp-6.7`
 - `humanmade/plugin-tester:wp-6.6`
 - etc.
 
-The `latest` tag uses the newest WordPress version with PHP 8.0.
+The `latest` tag uses the newest WordPress version with PHP 7.4.
 
 You will need `phpunit/phpunit` specified as a Composer dependency of your plugin. Additional arguments can be passed to PHPUnit on the CLI directly, e.g.: