diff --git a/README.md b/README.md
index 5ef75aa..17e38fb 100644
--- a/README.md
+++ b/README.md
@@ -109,6 +109,7 @@ There's a known issue with WordPress `alloptions` cache design. Specifically, a
 ## Changelog ##
 
 ### 1.4.5-dev ###
+* Support Relay in `check_client_dependencies()` correctly [[#471](https://github.com/pantheon-systems/wp-redis/pull/471)] (props @EarthlingDavey)
 
 ### 1.4.4 (November 27, 2023) ###
 * Updates Pantheon WP Coding Standards to 2.0 [[#445](https://github.com/pantheon-systems/wp-redis/pull/445)]
diff --git a/bin/helpers.sh b/bin/helpers.sh
new file mode 100644
index 0000000..8064c98
--- /dev/null
+++ b/bin/helpers.sh
@@ -0,0 +1,266 @@
+#!/usr/bin/env bash
+
+# Arbitrary download function that uses wget or curl depending on what's available.
+download() {
+    if which curl &> /dev/null; then  
+        curl -s "$1" > "$2";  
+    elif which wget &> /dev/null; then  
+        wget -nv -O "$2" "$1"  
+    else  
+        echo "Missing curl or wget" >&2  
+        exit 1  
+    fi  
+}
+
+# Download WordPress with wp-cli. Always forces the download of files to overwrite existing ones.
+download_wp() {
+	local TMPDIR="/tmp"
+	local WP_VERSION="latest"
+
+	for i in "$@"; do
+		case $i in
+			--version=*)
+			WP_VERSION="${i#*=}"
+			;;
+			--tmpdir=*)
+			TMPDIR="${i#*=}"
+			;;
+			*)
+			# unknown option
+			echo "Unknown option: $i. Usage: download_wp --version=latest --tmpdir=/tmp"
+			exit 1
+			;;
+		esac
+	done
+
+	# Check for WP-CLI. If the wp command does not exist, exit.
+	if ! which wp &> /dev/null; then
+		echo "WP-CLI is not installed. Exiting."
+		exit 1
+	fi
+
+	echo "Downloading WordPress version: ${WP_VERSION} to ${TMPDIR}/wordpress"
+	wp core download --version="$WP_VERSION" --path="${TMPDIR}/wordpress" --force
+}
+
+# Sets up WordPress using wp config create (if a wp-config file doesn't already exist) and wp core install. Expects that WordPress is already downloaded.
+setup_wp() {
+	# Initialize variables with default values
+	local TMPDIR="/tmp"
+	local DB_NAME="wordpress_test"
+	local DB_USER="root"
+	local DB_PASS=""
+	local DB_HOST="127.0.0.1"
+	local WP_VERSION=${WP_VERSION:-latest}
+
+	# Parse command-line arguments
+	for i in "$@"; do
+		case $i in
+			--dbname=*)
+			DB_NAME="${i#*=}"
+			;;
+			--dbuser=*)
+			DB_USER="${i#*=}"
+			;;
+			--dbpass=*)
+			DB_PASS="${i#*=}"
+			;;
+			--dbhost=*)
+			DB_HOST="${i#*=}"
+			;;
+			--version=*)
+			WP_VERSION="${i#*=}"
+			;;
+			--tmpdir=*)
+			TMPDIR="${i#*=}"
+			;;
+			*)
+			# unknown option
+			echo "Unknown option: $i. Usage: setup_wp --dbname=wordpress_test --dbuser=root --dbpass=root --dbhost=localhost --version=latest --tmpdir=/tmp"
+			exit 1
+			;;
+		esac
+	done
+
+	download http://api.wordpress.org/core/version-check/1.7/ "$TMPDIR"/wp-latest.json
+
+	if [ ! -f "$TMPDIR/wordpress/wp-config.php" ]; then
+		echo "Creating wp-config.php"
+		wp config create --dbname="$DB_NAME" --dbuser="$DB_USER" --dbpass="$DB_PASS" --dbhost="$DB_HOST" --dbprefix="wptests_" --path="${TMPDIR}/wordpress"
+	fi
+		
+	wp core install --url=localhost --title=Test --admin_user=admin --admin_password=password --admin_email=test@dev.null --path="${TMPDIR}/wordpress"
+}
+
+# Sets up WordPress nightly version. Uses setup_wp to get WordPress, then installs Gutenberg on the recently installed WordPress site.
+setup_wp_nightly() {
+	# Initialize variables with default values
+	local TMPDIR="/tmp"
+	local DB_NAME="wordpress_test"
+	local DB_USER="root"
+	local DB_PASS=""
+	local DB_HOST="127.0.0.1"
+
+	# Parse command-line arguments
+	for i in "$@"; do
+		case $i in
+			--dbname=*)
+			DB_NAME="${i#*=}"
+			;;
+			--dbuser=*)
+			DB_USER="${i#*=}"
+			;;
+			--dbpass=*)
+			DB_PASS="${i#*=}"
+			;;
+			--dbhost=*)
+			DB_HOST="${i#*=}"
+			;;
+			--tmpdir=*)
+			TMPDIR="${i#*=}"
+			;;
+			*)
+			# unknown option
+			echo "Unknown option: $i. Usage: setup_wp --dbname=wordpress_test --dbuser=root --dbpass=root --dbhost=localhost --version=latest --tmpdir=/tmp"
+			exit 1
+			;;
+		esac
+	done
+
+	WP_DIR="$TMPDIR/wordpress"
+
+	setup_wp --version="nightly" --tmpdir="$TMPDIR" --dbname="$DB_NAME" --dbuser="$DB_USER" --dbpass="$DB_PASS" --dbhost="$DB_HOST"
+
+	# If nightly version of WP is installed, install latest Gutenberg plugin and activate it.
+	echo "Installing Gutenberg plugin"
+	wp plugin install gutenberg --activate --path="$WP_DIR"
+}
+
+# Gets the WordPress version number from the JSON file. If the version is "latest", it will get the latest version from the JSON file. If the version is "nightly", it will return "trunk".
+get_wp_version_num() {
+	local WP_VERSION="latest"
+	local TMPDIR="/tmp/wp-latest.json"
+
+	for i in "$@"; do
+		case $i in
+			--version=*)
+			WP_VERSION="${i#*=}"
+			;;
+			--tmpdir=*)
+			TMPDIR="${i#*=}"
+			;;
+			*)
+			# unknown option
+			echo "Unknown option: $i. Usage: get_wp_version_num --version=latest --tmpdir=/tmp/wp-latest.json"
+			exit 1
+			;;
+		esac
+	done
+
+	# Get latest version from JSON if latest was passed.
+	WP_VERSION_JSON="${TMPDIR}/wp-latest.json"
+	if [ "$WP_VERSION" == "latest" ]; then
+		WP_VERSION=$(grep -o '"version":"[^"]*' "$WP_VERSION_JSON" | cut -d'"' -f4)
+	fi
+
+	if [ "$WP_VERSION" == "nightly" ]; then
+		WP_VERSION="trunk"
+	fi
+
+	echo "$WP_VERSION"
+}
+
+# Installs the WordPress test suite over svn. Uses get_wp_version_num to get a version based on what's passed that the svn repository will recognize.
+install_test_suite() {
+	local WP_VERSION=${1:-"latest"}
+	local TMPDIR=${2:-"/tmp"}
+	local DB_NAME=${3:-"wordpress_test"}
+	local DB_USER=${4:-"root"}
+	local DB_PASS=${5:-""}
+	local DB_HOST=${6:-"127.0.0.1"}
+	local WP_TESTS_DIR=${WP_TESTS_DIR-"$TMPDIR/wordpress-tests-lib"}
+	WP_VERSION=$(get_wp_version_num --version="$WP_VERSION" --tmpdir="$TMPDIR")
+
+	# If we're using trunk, there is no tests tag.
+	if [ "$WP_VERSION" == "trunk" ]; then
+		WP_TESTS_TAG="trunk"
+	else
+		WP_TESTS_TAG="tags/${WP_VERSION}"
+	fi
+
+	# portable in-place argument for both GNU sed and Mac OSX sed
+	if [[ $(uname -s) == 'Darwin' ]]; then
+		local ioption='-i .bak'
+	else
+		local ioption='-i'
+	fi
+
+	# set up testing suite if it doesn't yet exist
+	if [ ! -d "$WP_TESTS_DIR" ]; then
+		# set up testing suite
+		mkdir -p "$WP_TESTS_DIR"
+		svn co --quiet --ignore-externals https://develop.svn.wordpress.org/"${WP_TESTS_TAG}"/tests/phpunit/includes/ "$WP_TESTS_DIR"/includes
+		svn co --quiet --ignore-externals https://develop.svn.wordpress.org/"${WP_TESTS_TAG}"/tests/phpunit/data/ "$WP_TESTS_DIR"/data
+	fi
+
+	if [ ! -f wp-tests-config.php ]; then
+		download https://develop.svn.wordpress.org/"${WP_TESTS_TAG}"/wp-tests-config-sample.php "$WP_TESTS_DIR"/wp-tests-config.php
+		# remove all forward slashes in the end
+		WP_CORE_DIR="${WP_CORE_DIR%/}"
+		sed "$ioption" "s:dirname( __FILE__ ) . '/src/':'$WP_CORE_DIR/':" "$WP_TESTS_DIR"/wp-tests-config.php
+		sed "$ioption" "s/youremptytestdbnamehere/$DB_NAME/" "$WP_TESTS_DIR"/wp-tests-config.php
+		sed "$ioption" "s/yourusernamehere/$DB_USER/" "$WP_TESTS_DIR"/wp-tests-config.php
+		sed "$ioption" "s/yourpasswordhere/$DB_PASS/" "$WP_TESTS_DIR"/wp-tests-config.php
+		sed "$ioption" "s|localhost|${DB_HOST}|" "$WP_TESTS_DIR"/wp-tests-config.php
+	fi
+}
+
+# Installs the WordPress database. Uses the passed arguments to create a database.
+install_db() {
+	local DB_NAME=${1:-"wordpress_test"}
+	local DB_USER=${2:-"root"}
+	local DB_PASS=${3:-""}
+	local DB_HOST=${4:-"127.0.0.1"}
+
+	echo "Creating database: $1 on $4..."
+
+	# parse DB_HOST for port or socket references
+	IFS=':' read -ra PARTS <<< "${DB_HOST}"
+	local DB_HOSTNAME=${PARTS[0]};
+	local DB_SOCK_OR_PORT=${PARTS[1]};			
+	local EXTRA=(--user="$DB_USER")
+
+	if [ -n "$DB_HOSTNAME" ] ; then
+		if echo "$DB_SOCK_OR_PORT" | grep -qe '^[0-9]\{1,\}$'; then
+			EXTRA=("${EXTRA[@]}" --host="$DB_HOSTNAME" --port="$DB_SOCK_OR_PORT" --protocol=tcp)
+		elif [ -n "$DB_SOCK_OR_PORT" ] ; then
+			EXTRA=("${EXTRA[@]}" --socket="$DB_SOCK_OR_PORT")
+		elif [ -n "$DB_HOSTNAME" ] ; then
+			EXTRA=("${EXTRA[@]}" --host="$DB_HOSTNAME" --protocol=tcp)
+		fi
+	fi
+
+	if [ -n "$DB_PASS" ] ; then
+		EXTRA=("${EXTRA[@]}" --password="$DB_PASS")
+	fi
+
+	mysqladmin create "$DB_NAME" "${EXTRA[@]}"
+}
+
+# Deletes all the WordPress files so we can make another pass with a different version. Resets the database to an empty db (but does not drop it).
+cleanup() {
+	local TMPDIR=${1:-"/tmp"}
+	local WPDIR=${2:-"$TMPDIR/wordpress"}
+	local WP_TESTS_DIR=${3:-"$TMPDIR/wordpress-tests-lib"}
+	local WP_VERSION_JSON=${4:-"$TMPDIR/wp-latest.json"}
+
+	wp db reset --yes --path="$WPDIR"
+	rm -rf "$WPDIR"
+	rm -rf "$WP_TESTS_DIR"
+
+	# Check if the file exists
+	if [ -f "$WP_VERSION_JSON" ]; then
+		# Remove the files
+		rm -f "$WP_VERSION_JSON"
+	fi
+}
diff --git a/object-cache.php b/object-cache.php
index 7ac0757..72a1dc4 100644
--- a/object-cache.php
+++ b/object-cache.php
@@ -1226,8 +1226,12 @@ protected function _connect_redis() {
 	 *               not with a message describing the issue.
 	 */
 	public function check_client_dependencies() {
-		$has_relay = defined( 'WP_REDIS_USE_RELAY' ) && class_exists( 'Relay\Relay' );
-		if ( ! $has_relay || ! class_exists( 'Redis' ) ) {
+		$class_to_check = 'Redis';
+		if ( defined( 'WP_REDIS_USE_RELAY' ) && WP_REDIS_USE_RELAY ) {
+			$class_to_check = 'Relay\Relay';
+		}
+
+		if ( ! class_exists( $class_to_check ) ) {
 			return 'Warning! PHPRedis extension is unavailable, which is required by WP Redis object cache.';
 		}
 		return true;
diff --git a/readme.txt b/readme.txt
index e96e524..a1073a8 100644
--- a/readme.txt
+++ b/readme.txt
@@ -106,6 +106,7 @@ Please report security bugs found in the source code of the WP Redis plugin thro
 == Changelog ==
 
 = 1.4.5-dev =
+* Support Relay in check_client_dependencies() with the WP_REDIS_USE_RELAY constant [[#471](https://github.com/pantheon-systems/wp-redis/pull/471)]
 
 = 1.4.4 (November 27, 2023) =
 * Updates Pantheon WP Coding Standards to 2.0 [[#445](https://github.com/pantheon-systems/wp-redis/pull/445)]