diff --git a/.github/workflows/pr-unit-tests.yml b/.github/workflows/pr-unit-tests.yml
index 63a87c54e1c..18da726ee35 100644
--- a/.github/workflows/pr-unit-tests.yml
+++ b/.github/workflows/pr-unit-tests.yml
@@ -13,63 +13,50 @@ concurrency:
 permissions: {}
 
 jobs:
-    test:
-        name: PHP ${{ matrix.php }} WP ${{ matrix.wp }}
-        timeout-minutes: 30
-        runs-on: ubuntu-20.04
-        permissions:
-            contents: read
-        continue-on-error: ${{ matrix.wp == 'nightly' }}
-        strategy:
-            fail-fast: false
-            matrix:
-                php: ['7.4', '8.0']
-                wp: ['latest']
-                include:
-                    - wp: nightly
-                      php: '7.4'
-                    - wp: '5.9'
-                      php: 7.4
-                    - wp: '5.8'
-                      php: 7.4
-        services:
-            database:
-                image: mysql:5.6
-                env:
-                    MYSQL_ROOT_PASSWORD: root
-                ports:
-                    - 3306:3306
-                options: --health-cmd="mysqladmin ping" --health-interval=10s --health-timeout=5s --health-retries=5
-        steps:
-            - uses: actions/checkout@v3
+  test:
+    name: PHP ${{ matrix.php }} WP ${{ matrix.wp }}
+    timeout-minutes: 30
+    runs-on: ubuntu-20.04
+    permissions:
+      contents: read
+    continue-on-error: ${{ matrix.wp == 'nightly' }}
+    strategy:
+      fail-fast: false
+      matrix:
+        php: [ '7.4', '8.0' ]
+        wp: [ "latest" ]
+        include:
+          - wp: nightly
+            php: '7.4'
+          - wp: '6.0'
+            php: 7.4
+          - wp: '5.9'
+            php: 7.4
+    services:
+      database:
+        image: mysql:5.6
+        env:
+          MYSQL_ROOT_PASSWORD: root
+        ports:
+          - 3306:3306
+        options: --health-cmd="mysqladmin ping" --health-interval=10s --health-timeout=5s --health-retries=5
+    steps:
+      - uses: actions/checkout@v3
 
-            - name: Setup WooCommerce Monorepo
-              uses: ./.github/actions/setup-woocommerce-monorepo
-              with:
-                  php-version: ${{ matrix.php }}
+      - name: Setup WooCommerce Monorepo
+        uses: ./.github/actions/setup-woocommerce-monorepo
+        with:
+            php-version: ${{ matrix.php }}
 
-            - name: Tool versions
-              run: |
-                  php --version
-                  composer --version
+      - name: Tool versions
+        run: |
+            php --version
+            composer --version
 
-            - name: Add PHP8 Compatibility.
-              run: |
-                  if [ "$(php -r "echo version_compare(PHP_VERSION,'8.0','>=');")" ]; then
-                     cd plugins/woocommerce
-                     curl -L https://github.com/woocommerce/phpunit/archive/add-compatibility-with-php8-to-phpunit-7.zip -o /tmp/phpunit-7.5-fork.zip
-                     unzip -d /tmp/phpunit-7.5-fork /tmp/phpunit-7.5-fork.zip
-                     composer bin phpunit config --unset platform
-                     composer bin phpunit config repositories.0 '{"type": "path", "url": "/tmp/phpunit-7.5-fork/phpunit-add-compatibility-with-php8-to-phpunit-7", "options": {"symlink": false}}'
-                     composer bin phpunit require --dev -W phpunit/phpunit:@dev --ignore-platform-reqs
-                     rm -rf ./vendor/phpunit/
-                     composer dump-autoload
-                   fi
+      - name: Init DB and WP
+        working-directory: plugins/woocommerce
+        run: ./tests/bin/install.sh woo_test root root 127.0.0.1 ${{ matrix.wp }}
 
-            - name: Init DB and WP
-              working-directory: plugins/woocommerce
-              run: ./tests/bin/install.sh woo_test root root 127.0.0.1 ${{ matrix.wp }}
-
-            - name: Run tests
-              working-directory: plugins/woocommerce
-              run: pnpm run test --filter=woocommerce --color
+      - name: Run tests
+        working-directory: plugins/woocommerce
+        run: pnpm run test --filter=woocommerce --color
diff --git a/plugins/woocommerce/bin/composer/mozart/composer.lock b/plugins/woocommerce/bin/composer/mozart/composer.lock
index 1554fb40d8b..5291be463e6 100644
--- a/plugins/woocommerce/bin/composer/mozart/composer.lock
+++ b/plugins/woocommerce/bin/composer/mozart/composer.lock
@@ -1169,5 +1169,5 @@
     "platform-overrides": {
         "php": "7.3"
     },
-    "plugin-api-version": "2.3.0"
+    "plugin-api-version": "2.0.0"
 }
diff --git a/plugins/woocommerce/bin/composer/phpcs/composer.lock b/plugins/woocommerce/bin/composer/phpcs/composer.lock
index 0e1a6def19c..29bcf29ff1d 100644
--- a/plugins/woocommerce/bin/composer/phpcs/composer.lock
+++ b/plugins/woocommerce/bin/composer/phpcs/composer.lock
@@ -475,5 +475,5 @@
     "platform-overrides": {
         "php": "7.2"
     },
-    "plugin-api-version": "2.3.0"
+    "plugin-api-version": "2.0.0"
 }
diff --git a/plugins/woocommerce/bin/composer/phpunit/composer.lock b/plugins/woocommerce/bin/composer/phpunit/composer.lock
index 1983c0a3a0b..c80d9739bc5 100644
--- a/plugins/woocommerce/bin/composer/phpunit/composer.lock
+++ b/plugins/woocommerce/bin/composer/phpunit/composer.lock
@@ -1697,5 +1697,5 @@
     "platform-overrides": {
         "php": "7.0"
     },
-    "plugin-api-version": "2.3.0"
+    "plugin-api-version": "2.0.0"
 }
diff --git a/plugins/woocommerce/bin/composer/wp/composer.lock b/plugins/woocommerce/bin/composer/wp/composer.lock
index d97875d11d1..84e38397103 100644
--- a/plugins/woocommerce/bin/composer/wp/composer.lock
+++ b/plugins/woocommerce/bin/composer/wp/composer.lock
@@ -687,5 +687,5 @@
     "platform-overrides": {
         "php": "7.0"
     },
-    "plugin-api-version": "2.3.0"
+    "plugin-api-version": "2.0.0"
 }
diff --git a/plugins/woocommerce/changelog/upgrade-to-phpunit-8 b/plugins/woocommerce/changelog/upgrade-to-phpunit-8
new file mode 100644
index 00000000000..f08bce4ff53
--- /dev/null
+++ b/plugins/woocommerce/changelog/upgrade-to-phpunit-8
@@ -0,0 +1,4 @@
+Significance: patch
+Type: dev
+
+Upgrade PHPUnit to v8
diff --git a/plugins/woocommerce/composer.json b/plugins/woocommerce/composer.json
index 973a2216fd2..60cb6ae41f7 100644
--- a/plugins/woocommerce/composer.json
+++ b/plugins/woocommerce/composer.json
@@ -24,11 +24,12 @@
 		"woocommerce/woocommerce-blocks": "9.1.4"
 	},
 	"require-dev": {
-		"bamarni/composer-bin-plugin": "^1.4",
-		"yoast/phpunit-polyfills": "^1.0",
-		"phpunit/phpunit": "7.5.20",
 		"automattic/jetpack-changelogger": "^3.3.0",
-		"sebastian/comparator": "3.0.3"
+		"bamarni/composer-bin-plugin": "^1.4",
+		"dms/phpunit-arraysubset-asserts": "^0.4.0",
+		"phpunit/phpunit": "^8.0",
+		"sebastian/comparator": "3.0.3",
+		"yoast/phpunit-polyfills": "^1.0"
 	},
 	"config": {
 		"optimize-autoloader": true,
diff --git a/plugins/woocommerce/composer.lock b/plugins/woocommerce/composer.lock
index d018bb3388d..66036e5e61d 100644
--- a/plugins/woocommerce/composer.lock
+++ b/plugins/woocommerce/composer.lock
@@ -4,7 +4,7 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "5d6aa45a4ccd532e09383828f396c06d",
+    "content-hash": "c00f9ad96d703d7e841895190ec42436",
     "packages": [
         {
             "name": "automattic/jetpack-autoloader",
@@ -797,31 +797,76 @@
             "time": "2022-02-22T21:01:25+00:00"
         },
         {
-            "name": "doctrine/instantiator",
-            "version": "1.4.1",
+            "name": "dms/phpunit-arraysubset-asserts",
+            "version": "v0.4.0",
             "source": {
                 "type": "git",
-                "url": "https://github.com/doctrine/instantiator.git",
-                "reference": "10dcfce151b967d20fde1b34ae6640712c3891bc"
+                "url": "https://github.com/rdohms/phpunit-arraysubset-asserts.git",
+                "reference": "428293c2a00eceefbad71a2dbdfb913febb35de2"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/doctrine/instantiator/zipball/10dcfce151b967d20fde1b34ae6640712c3891bc",
-                "reference": "10dcfce151b967d20fde1b34ae6640712c3891bc",
+                "url": "https://api.github.com/repos/rdohms/phpunit-arraysubset-asserts/zipball/428293c2a00eceefbad71a2dbdfb913febb35de2",
+                "reference": "428293c2a00eceefbad71a2dbdfb913febb35de2",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^5.4 || ^7.0 || ^8.0",
+                "phpunit/phpunit": "^4.8.36 || ^5.7.21 || ^6.0 || ^7.0 || ^8.0 || ^9.0"
+            },
+            "require-dev": {
+                "dms/coding-standard": "^9",
+                "squizlabs/php_codesniffer": "^3.4"
+            },
+            "type": "library",
+            "autoload": {
+                "files": [
+                    "assertarraysubset-autoload.php"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Rafael Dohms",
+                    "email": "rdohms@gmail.com"
+                }
+            ],
+            "description": "This package provides ArraySubset and related asserts once deprecated in PHPUnit 8",
+            "support": {
+                "issues": "https://github.com/rdohms/phpunit-arraysubset-asserts/issues",
+                "source": "https://github.com/rdohms/phpunit-arraysubset-asserts/tree/v0.4.0"
+            },
+            "time": "2022-02-13T15:00:28+00:00"
+        },
+        {
+            "name": "doctrine/instantiator",
+            "version": "1.5.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/doctrine/instantiator.git",
+                "reference": "0a0fa9780f5d4e507415a065172d26a98d02047b"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/doctrine/instantiator/zipball/0a0fa9780f5d4e507415a065172d26a98d02047b",
+                "reference": "0a0fa9780f5d4e507415a065172d26a98d02047b",
                 "shasum": ""
             },
             "require": {
                 "php": "^7.1 || ^8.0"
             },
             "require-dev": {
-                "doctrine/coding-standard": "^9",
+                "doctrine/coding-standard": "^9 || ^11",
                 "ext-pdo": "*",
                 "ext-phar": "*",
                 "phpbench/phpbench": "^0.16 || ^1",
                 "phpstan/phpstan": "^1.4",
                 "phpstan/phpstan-phpunit": "^1",
                 "phpunit/phpunit": "^7.5 || ^8.5 || ^9.5",
-                "vimeo/psalm": "^4.22"
+                "vimeo/psalm": "^4.30 || ^5.4"
             },
             "type": "library",
             "autoload": {
@@ -848,7 +893,7 @@
             ],
             "support": {
                 "issues": "https://github.com/doctrine/instantiator/issues",
-                "source": "https://github.com/doctrine/instantiator/tree/1.4.1"
+                "source": "https://github.com/doctrine/instantiator/tree/1.5.0"
             },
             "funding": [
                 {
@@ -864,7 +909,7 @@
                     "type": "tidelift"
                 }
             ],
-            "time": "2022-03-03T08:28:38+00:00"
+            "time": "2022-12-30T00:15:36+00:00"
         },
         {
             "name": "myclabs/deep-copy",
@@ -927,28 +972,29 @@
         },
         {
             "name": "phar-io/manifest",
-            "version": "1.0.3",
+            "version": "2.0.3",
             "source": {
                 "type": "git",
                 "url": "https://github.com/phar-io/manifest.git",
-                "reference": "7761fcacf03b4d4f16e7ccb606d4879ca431fcf4"
+                "reference": "97803eca37d319dfa7826cc2437fc020857acb53"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/phar-io/manifest/zipball/7761fcacf03b4d4f16e7ccb606d4879ca431fcf4",
-                "reference": "7761fcacf03b4d4f16e7ccb606d4879ca431fcf4",
+                "url": "https://api.github.com/repos/phar-io/manifest/zipball/97803eca37d319dfa7826cc2437fc020857acb53",
+                "reference": "97803eca37d319dfa7826cc2437fc020857acb53",
                 "shasum": ""
             },
             "require": {
                 "ext-dom": "*",
                 "ext-phar": "*",
-                "phar-io/version": "^2.0",
-                "php": "^5.6 || ^7.0"
+                "ext-xmlwriter": "*",
+                "phar-io/version": "^3.0.1",
+                "php": "^7.2 || ^8.0"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.0.x-dev"
+                    "dev-master": "2.0.x-dev"
                 }
             },
             "autoload": {
@@ -980,26 +1026,26 @@
             "description": "Component for reading phar.io manifest information from a PHP Archive (PHAR)",
             "support": {
                 "issues": "https://github.com/phar-io/manifest/issues",
-                "source": "https://github.com/phar-io/manifest/tree/master"
+                "source": "https://github.com/phar-io/manifest/tree/2.0.3"
             },
-            "time": "2018-07-08T19:23:20+00:00"
+            "time": "2021-07-20T11:28:43+00:00"
         },
         {
             "name": "phar-io/version",
-            "version": "2.0.1",
+            "version": "3.2.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/phar-io/version.git",
-                "reference": "45a2ec53a73c70ce41d55cedef9063630abaf1b6"
+                "reference": "4f7fd7836c6f332bb2933569e566a0d6c4cbed74"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/phar-io/version/zipball/45a2ec53a73c70ce41d55cedef9063630abaf1b6",
-                "reference": "45a2ec53a73c70ce41d55cedef9063630abaf1b6",
+                "url": "https://api.github.com/repos/phar-io/version/zipball/4f7fd7836c6f332bb2933569e566a0d6c4cbed74",
+                "reference": "4f7fd7836c6f332bb2933569e566a0d6c4cbed74",
                 "shasum": ""
             },
             "require": {
-                "php": "^5.6 || ^7.0"
+                "php": "^7.2 || ^8.0"
             },
             "type": "library",
             "autoload": {
@@ -1031,273 +1077,46 @@
             "description": "Library for handling version information and constraints",
             "support": {
                 "issues": "https://github.com/phar-io/version/issues",
-                "source": "https://github.com/phar-io/version/tree/master"
+                "source": "https://github.com/phar-io/version/tree/3.2.1"
             },
-            "time": "2018-07-08T19:19:57+00:00"
-        },
-        {
-            "name": "phpdocumentor/reflection-common",
-            "version": "2.2.0",
-            "source": {
-                "type": "git",
-                "url": "https://github.com/phpDocumentor/ReflectionCommon.git",
-                "reference": "1d01c49d4ed62f25aa84a747ad35d5a16924662b"
-            },
-            "dist": {
-                "type": "zip",
-                "url": "https://api.github.com/repos/phpDocumentor/ReflectionCommon/zipball/1d01c49d4ed62f25aa84a747ad35d5a16924662b",
-                "reference": "1d01c49d4ed62f25aa84a747ad35d5a16924662b",
-                "shasum": ""
-            },
-            "require": {
-                "php": "^7.2 || ^8.0"
-            },
-            "type": "library",
-            "extra": {
-                "branch-alias": {
-                    "dev-2.x": "2.x-dev"
-                }
-            },
-            "autoload": {
-                "psr-4": {
-                    "phpDocumentor\\Reflection\\": "src/"
-                }
-            },
-            "notification-url": "https://packagist.org/downloads/",
-            "license": [
-                "MIT"
-            ],
-            "authors": [
-                {
-                    "name": "Jaap van Otterdijk",
-                    "email": "opensource@ijaap.nl"
-                }
-            ],
-            "description": "Common reflection classes used by phpdocumentor to reflect the code structure",
-            "homepage": "http://www.phpdoc.org",
-            "keywords": [
-                "FQSEN",
-                "phpDocumentor",
-                "phpdoc",
-                "reflection",
-                "static analysis"
-            ],
-            "support": {
-                "issues": "https://github.com/phpDocumentor/ReflectionCommon/issues",
-                "source": "https://github.com/phpDocumentor/ReflectionCommon/tree/2.x"
-            },
-            "time": "2020-06-27T09:03:43+00:00"
-        },
-        {
-            "name": "phpdocumentor/reflection-docblock",
-            "version": "5.3.0",
-            "source": {
-                "type": "git",
-                "url": "https://github.com/phpDocumentor/ReflectionDocBlock.git",
-                "reference": "622548b623e81ca6d78b721c5e029f4ce664f170"
-            },
-            "dist": {
-                "type": "zip",
-                "url": "https://api.github.com/repos/phpDocumentor/ReflectionDocBlock/zipball/622548b623e81ca6d78b721c5e029f4ce664f170",
-                "reference": "622548b623e81ca6d78b721c5e029f4ce664f170",
-                "shasum": ""
-            },
-            "require": {
-                "ext-filter": "*",
-                "php": "^7.2 || ^8.0",
-                "phpdocumentor/reflection-common": "^2.2",
-                "phpdocumentor/type-resolver": "^1.3",
-                "webmozart/assert": "^1.9.1"
-            },
-            "require-dev": {
-                "mockery/mockery": "~1.3.2",
-                "psalm/phar": "^4.8"
-            },
-            "type": "library",
-            "extra": {
-                "branch-alias": {
-                    "dev-master": "5.x-dev"
-                }
-            },
-            "autoload": {
-                "psr-4": {
-                    "phpDocumentor\\Reflection\\": "src"
-                }
-            },
-            "notification-url": "https://packagist.org/downloads/",
-            "license": [
-                "MIT"
-            ],
-            "authors": [
-                {
-                    "name": "Mike van Riel",
-                    "email": "me@mikevanriel.com"
-                },
-                {
-                    "name": "Jaap van Otterdijk",
-                    "email": "account@ijaap.nl"
-                }
-            ],
-            "description": "With this component, a library can provide support for annotations via DocBlocks or otherwise retrieve information that is embedded in a DocBlock.",
-            "support": {
-                "issues": "https://github.com/phpDocumentor/ReflectionDocBlock/issues",
-                "source": "https://github.com/phpDocumentor/ReflectionDocBlock/tree/5.3.0"
-            },
-            "time": "2021-10-19T17:43:47+00:00"
-        },
-        {
-            "name": "phpdocumentor/type-resolver",
-            "version": "1.6.1",
-            "source": {
-                "type": "git",
-                "url": "https://github.com/phpDocumentor/TypeResolver.git",
-                "reference": "77a32518733312af16a44300404e945338981de3"
-            },
-            "dist": {
-                "type": "zip",
-                "url": "https://api.github.com/repos/phpDocumentor/TypeResolver/zipball/77a32518733312af16a44300404e945338981de3",
-                "reference": "77a32518733312af16a44300404e945338981de3",
-                "shasum": ""
-            },
-            "require": {
-                "php": "^7.2 || ^8.0",
-                "phpdocumentor/reflection-common": "^2.0"
-            },
-            "require-dev": {
-                "ext-tokenizer": "*",
-                "psalm/phar": "^4.8"
-            },
-            "type": "library",
-            "extra": {
-                "branch-alias": {
-                    "dev-1.x": "1.x-dev"
-                }
-            },
-            "autoload": {
-                "psr-4": {
-                    "phpDocumentor\\Reflection\\": "src"
-                }
-            },
-            "notification-url": "https://packagist.org/downloads/",
-            "license": [
-                "MIT"
-            ],
-            "authors": [
-                {
-                    "name": "Mike van Riel",
-                    "email": "me@mikevanriel.com"
-                }
-            ],
-            "description": "A PSR-5 based resolver of Class names, Types and Structural Element Names",
-            "support": {
-                "issues": "https://github.com/phpDocumentor/TypeResolver/issues",
-                "source": "https://github.com/phpDocumentor/TypeResolver/tree/1.6.1"
-            },
-            "time": "2022-03-15T21:29:03+00:00"
-        },
-        {
-            "name": "phpspec/prophecy",
-            "version": "v1.16.0",
-            "source": {
-                "type": "git",
-                "url": "https://github.com/phpspec/prophecy.git",
-                "reference": "be8cac52a0827776ff9ccda8c381ac5b71aeb359"
-            },
-            "dist": {
-                "type": "zip",
-                "url": "https://api.github.com/repos/phpspec/prophecy/zipball/be8cac52a0827776ff9ccda8c381ac5b71aeb359",
-                "reference": "be8cac52a0827776ff9ccda8c381ac5b71aeb359",
-                "shasum": ""
-            },
-            "require": {
-                "doctrine/instantiator": "^1.2",
-                "php": "^7.2 || 8.0.* || 8.1.* || 8.2.*",
-                "phpdocumentor/reflection-docblock": "^5.2",
-                "sebastian/comparator": "^3.0 || ^4.0",
-                "sebastian/recursion-context": "^3.0 || ^4.0"
-            },
-            "require-dev": {
-                "phpspec/phpspec": "^6.0 || ^7.0",
-                "phpunit/phpunit": "^8.0 || ^9.0"
-            },
-            "type": "library",
-            "extra": {
-                "branch-alias": {
-                    "dev-master": "1.x-dev"
-                }
-            },
-            "autoload": {
-                "psr-4": {
-                    "Prophecy\\": "src/Prophecy"
-                }
-            },
-            "notification-url": "https://packagist.org/downloads/",
-            "license": [
-                "MIT"
-            ],
-            "authors": [
-                {
-                    "name": "Konstantin Kudryashov",
-                    "email": "ever.zet@gmail.com",
-                    "homepage": "http://everzet.com"
-                },
-                {
-                    "name": "Marcello Duarte",
-                    "email": "marcello.duarte@gmail.com"
-                }
-            ],
-            "description": "Highly opinionated mocking framework for PHP 5.3+",
-            "homepage": "https://github.com/phpspec/prophecy",
-            "keywords": [
-                "Double",
-                "Dummy",
-                "fake",
-                "mock",
-                "spy",
-                "stub"
-            ],
-            "support": {
-                "issues": "https://github.com/phpspec/prophecy/issues",
-                "source": "https://github.com/phpspec/prophecy/tree/v1.16.0"
-            },
-            "time": "2022-11-29T15:06:56+00:00"
+            "time": "2022-02-21T01:04:05+00:00"
         },
         {
             "name": "phpunit/php-code-coverage",
-            "version": "6.1.4",
+            "version": "7.0.15",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/php-code-coverage.git",
-                "reference": "807e6013b00af69b6c5d9ceb4282d0393dbb9d8d"
+                "reference": "819f92bba8b001d4363065928088de22f25a3a48"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/php-code-coverage/zipball/807e6013b00af69b6c5d9ceb4282d0393dbb9d8d",
-                "reference": "807e6013b00af69b6c5d9ceb4282d0393dbb9d8d",
+                "url": "https://api.github.com/repos/sebastianbergmann/php-code-coverage/zipball/819f92bba8b001d4363065928088de22f25a3a48",
+                "reference": "819f92bba8b001d4363065928088de22f25a3a48",
                 "shasum": ""
             },
             "require": {
                 "ext-dom": "*",
                 "ext-xmlwriter": "*",
-                "php": "^7.1",
-                "phpunit/php-file-iterator": "^2.0",
+                "php": ">=7.2",
+                "phpunit/php-file-iterator": "^2.0.2",
                 "phpunit/php-text-template": "^1.2.1",
-                "phpunit/php-token-stream": "^3.0",
+                "phpunit/php-token-stream": "^3.1.3 || ^4.0",
                 "sebastian/code-unit-reverse-lookup": "^1.0.1",
-                "sebastian/environment": "^3.1 || ^4.0",
+                "sebastian/environment": "^4.2.2",
                 "sebastian/version": "^2.0.1",
-                "theseer/tokenizer": "^1.1"
+                "theseer/tokenizer": "^1.1.3"
             },
             "require-dev": {
-                "phpunit/phpunit": "^7.0"
+                "phpunit/phpunit": "^8.2.2"
             },
             "suggest": {
-                "ext-xdebug": "^2.6.0"
+                "ext-xdebug": "^2.7.2"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "6.1-dev"
+                    "dev-master": "7.0-dev"
                 }
             },
             "autoload": {
@@ -1325,9 +1144,15 @@
             ],
             "support": {
                 "issues": "https://github.com/sebastianbergmann/php-code-coverage/issues",
-                "source": "https://github.com/sebastianbergmann/php-code-coverage/tree/master"
+                "source": "https://github.com/sebastianbergmann/php-code-coverage/tree/7.0.15"
             },
-            "time": "2018-10-31T16:06:48+00:00"
+            "funding": [
+                {
+                    "url": "https://github.com/sebastianbergmann",
+                    "type": "github"
+                }
+            ],
+            "time": "2021-07-26T12:20:09+00:00"
         },
         {
             "name": "phpunit/php-file-iterator",
@@ -1555,53 +1380,48 @@
         },
         {
             "name": "phpunit/phpunit",
-            "version": "7.5.20",
+            "version": "8.5.29",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/phpunit.git",
-                "reference": "9467db479d1b0487c99733bb1e7944d32deded2c"
+                "reference": "e8c563c47a9a303662955518ca532b022b337f4d"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/phpunit/zipball/9467db479d1b0487c99733bb1e7944d32deded2c",
-                "reference": "9467db479d1b0487c99733bb1e7944d32deded2c",
+                "url": "https://api.github.com/repos/sebastianbergmann/phpunit/zipball/e8c563c47a9a303662955518ca532b022b337f4d",
+                "reference": "e8c563c47a9a303662955518ca532b022b337f4d",
                 "shasum": ""
             },
             "require": {
-                "doctrine/instantiator": "^1.1",
+                "doctrine/instantiator": "^1.3.1",
                 "ext-dom": "*",
                 "ext-json": "*",
                 "ext-libxml": "*",
                 "ext-mbstring": "*",
                 "ext-xml": "*",
-                "myclabs/deep-copy": "^1.7",
-                "phar-io/manifest": "^1.0.2",
-                "phar-io/version": "^2.0",
-                "php": "^7.1",
-                "phpspec/prophecy": "^1.7",
-                "phpunit/php-code-coverage": "^6.0.7",
-                "phpunit/php-file-iterator": "^2.0.1",
+                "ext-xmlwriter": "*",
+                "myclabs/deep-copy": "^1.10.0",
+                "phar-io/manifest": "^2.0.3",
+                "phar-io/version": "^3.0.2",
+                "php": ">=7.2",
+                "phpunit/php-code-coverage": "^7.0.12",
+                "phpunit/php-file-iterator": "^2.0.4",
                 "phpunit/php-text-template": "^1.2.1",
-                "phpunit/php-timer": "^2.1",
-                "sebastian/comparator": "^3.0",
-                "sebastian/diff": "^3.0",
-                "sebastian/environment": "^4.0",
-                "sebastian/exporter": "^3.1",
-                "sebastian/global-state": "^2.0",
+                "phpunit/php-timer": "^2.1.2",
+                "sebastian/comparator": "^3.0.2",
+                "sebastian/diff": "^3.0.2",
+                "sebastian/environment": "^4.2.3",
+                "sebastian/exporter": "^3.1.2",
+                "sebastian/global-state": "^3.0.0",
                 "sebastian/object-enumerator": "^3.0.3",
-                "sebastian/resource-operations": "^2.0",
+                "sebastian/resource-operations": "^2.0.1",
+                "sebastian/type": "^1.1.3",
                 "sebastian/version": "^2.0.1"
             },
-            "conflict": {
-                "phpunit/phpunit-mock-objects": "*"
-            },
-            "require-dev": {
-                "ext-pdo": "*"
-            },
             "suggest": {
                 "ext-soap": "*",
                 "ext-xdebug": "*",
-                "phpunit/php-invoker": "^2.0"
+                "phpunit/php-invoker": "^2.0.0"
             },
             "bin": [
                 "phpunit"
@@ -1609,7 +1429,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "7.5-dev"
+                    "dev-master": "8.5-dev"
                 }
             },
             "autoload": {
@@ -1637,9 +1457,19 @@
             ],
             "support": {
                 "issues": "https://github.com/sebastianbergmann/phpunit/issues",
-                "source": "https://github.com/sebastianbergmann/phpunit/tree/7.5.20"
+                "source": "https://github.com/sebastianbergmann/phpunit/tree/8.5.29"
             },
-            "time": "2020-01-08T08:45:45+00:00"
+            "funding": [
+                {
+                    "url": "https://phpunit.de/sponsors.html",
+                    "type": "custom"
+                },
+                {
+                    "url": "https://github.com/sebastianbergmann",
+                    "type": "github"
+                }
+            ],
+            "time": "2022-08-22T13:59:39+00:00"
         },
         {
             "name": "psr/log",
@@ -2028,23 +1858,26 @@
         },
         {
             "name": "sebastian/global-state",
-            "version": "2.0.0",
+            "version": "3.0.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/sebastianbergmann/global-state.git",
-                "reference": "e8ba02eed7bbbb9e59e43dedd3dddeff4a56b0c4"
+                "reference": "de036ec91d55d2a9e0db2ba975b512cdb1c23921"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/sebastianbergmann/global-state/zipball/e8ba02eed7bbbb9e59e43dedd3dddeff4a56b0c4",
-                "reference": "e8ba02eed7bbbb9e59e43dedd3dddeff4a56b0c4",
+                "url": "https://api.github.com/repos/sebastianbergmann/global-state/zipball/de036ec91d55d2a9e0db2ba975b512cdb1c23921",
+                "reference": "de036ec91d55d2a9e0db2ba975b512cdb1c23921",
                 "shasum": ""
             },
             "require": {
-                "php": "^7.0"
+                "php": ">=7.2",
+                "sebastian/object-reflector": "^1.1.1",
+                "sebastian/recursion-context": "^3.0"
             },
             "require-dev": {
-                "phpunit/phpunit": "^6.0"
+                "ext-dom": "*",
+                "phpunit/phpunit": "^8.0"
             },
             "suggest": {
                 "ext-uopz": "*"
@@ -2052,7 +1885,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "2.0-dev"
+                    "dev-master": "3.0-dev"
                 }
             },
             "autoload": {
@@ -2077,9 +1910,15 @@
             ],
             "support": {
                 "issues": "https://github.com/sebastianbergmann/global-state/issues",
-                "source": "https://github.com/sebastianbergmann/global-state/tree/2.0.0"
+                "source": "https://github.com/sebastianbergmann/global-state/tree/3.0.2"
             },
-            "time": "2017-04-27T15:39:26+00:00"
+            "funding": [
+                {
+                    "url": "https://github.com/sebastianbergmann",
+                    "type": "github"
+                }
+            ],
+            "time": "2022-02-10T06:55:38+00:00"
         },
         {
             "name": "sebastian/object-enumerator",
@@ -2308,6 +2147,62 @@
             ],
             "time": "2020-11-30T07:30:19+00:00"
         },
+        {
+            "name": "sebastian/type",
+            "version": "1.1.4",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/sebastianbergmann/type.git",
+                "reference": "0150cfbc4495ed2df3872fb31b26781e4e077eb4"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/sebastianbergmann/type/zipball/0150cfbc4495ed2df3872fb31b26781e4e077eb4",
+                "reference": "0150cfbc4495ed2df3872fb31b26781e4e077eb4",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=7.2"
+            },
+            "require-dev": {
+                "phpunit/phpunit": "^8.2"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.1-dev"
+                }
+            },
+            "autoload": {
+                "classmap": [
+                    "src/"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "BSD-3-Clause"
+            ],
+            "authors": [
+                {
+                    "name": "Sebastian Bergmann",
+                    "email": "sebastian@phpunit.de",
+                    "role": "lead"
+                }
+            ],
+            "description": "Collection of value objects that represent the types of the PHP type system",
+            "homepage": "https://github.com/sebastianbergmann/type",
+            "support": {
+                "issues": "https://github.com/sebastianbergmann/type/issues",
+                "source": "https://github.com/sebastianbergmann/type/tree/1.1.4"
+            },
+            "funding": [
+                {
+                    "url": "https://github.com/sebastianbergmann",
+                    "type": "github"
+                }
+            ],
+            "time": "2020-11-30T07:25:11+00:00"
+        },
         {
             "name": "sebastian/version",
             "version": "2.0.1",
@@ -2702,64 +2597,6 @@
             ],
             "time": "2021-07-28T10:34:58+00:00"
         },
-        {
-            "name": "webmozart/assert",
-            "version": "1.11.0",
-            "source": {
-                "type": "git",
-                "url": "https://github.com/webmozarts/assert.git",
-                "reference": "11cb2199493b2f8a3b53e7f19068fc6aac760991"
-            },
-            "dist": {
-                "type": "zip",
-                "url": "https://api.github.com/repos/webmozarts/assert/zipball/11cb2199493b2f8a3b53e7f19068fc6aac760991",
-                "reference": "11cb2199493b2f8a3b53e7f19068fc6aac760991",
-                "shasum": ""
-            },
-            "require": {
-                "ext-ctype": "*",
-                "php": "^7.2 || ^8.0"
-            },
-            "conflict": {
-                "phpstan/phpstan": "<0.12.20",
-                "vimeo/psalm": "<4.6.1 || 4.6.2"
-            },
-            "require-dev": {
-                "phpunit/phpunit": "^8.5.13"
-            },
-            "type": "library",
-            "extra": {
-                "branch-alias": {
-                    "dev-master": "1.10-dev"
-                }
-            },
-            "autoload": {
-                "psr-4": {
-                    "Webmozart\\Assert\\": "src/"
-                }
-            },
-            "notification-url": "https://packagist.org/downloads/",
-            "license": [
-                "MIT"
-            ],
-            "authors": [
-                {
-                    "name": "Bernhard Schussek",
-                    "email": "bschussek@gmail.com"
-                }
-            ],
-            "description": "Assertions to validate method input/output with nice error messages.",
-            "keywords": [
-                "assert",
-                "check",
-                "validate"
-            ],
-            "support": {
-                "issues": "https://github.com/webmozarts/assert/issues",
-                "source": "https://github.com/webmozarts/assert/tree/1.11.0"
-            },
-            "time": "2022-06-03T18:03:27+00:00"
-        },
         {
             "name": "wikimedia/at-ease",
             "version": "v2.0.0",
@@ -2889,5 +2726,5 @@
     "platform-overrides": {
         "php": "7.2"
     },
-    "plugin-api-version": "2.3.0"
+    "plugin-api-version": "2.0.0"
 }
diff --git a/plugins/woocommerce/tests/legacy/bootstrap.php b/plugins/woocommerce/tests/legacy/bootstrap.php
index 171219764d4..01aef6f2c19 100644
--- a/plugins/woocommerce/tests/legacy/bootstrap.php
+++ b/plugins/woocommerce/tests/legacy/bootstrap.php
@@ -13,7 +13,7 @@ use Automattic\WooCommerce\Testing\Tools\CodeHacking\Hacks\StaticMockerHack;
 use Automattic\WooCommerce\Testing\Tools\CodeHacking\Hacks\FunctionsMockerHack;
 use Automattic\WooCommerce\Testing\Tools\CodeHacking\Hacks\BypassFinalsHack;
 use Automattic\WooCommerce\Testing\Tools\DependencyManagement\MockableLegacyProxy;
-\PHPUnit\Framework\Error\Deprecated::$enabled = false;
+
 /**
  * Class WC_Unit_Tests_Bootstrap
  */
diff --git a/plugins/woocommerce/tests/legacy/unit-tests/woocommerce-admin/api-init.php b/plugins/woocommerce/tests/legacy/unit-tests/woocommerce-admin/api-init.php
index 68a569bdbb9..9428bcb0c68 100644
--- a/plugins/woocommerce/tests/legacy/unit-tests/woocommerce-admin/api-init.php
+++ b/plugins/woocommerce/tests/legacy/unit-tests/woocommerce-admin/api-init.php
@@ -9,11 +9,14 @@
 use Automattic\WooCommerce\Internal\Admin\Schedulers\CustomersScheduler;
 use Automattic\WooCommerce\Internal\Admin\Schedulers\OrdersScheduler;
 use \Automattic\WooCommerce\Admin\API\Reports\Orders\Stats\DataStore as OrdersStatsDataStore;
+use DMS\PHPUnitExtensions\ArraySubset\ArraySubsetAsserts;
 
 /**
  * Class WC_Admin_Tests_API_Init
  */
 class WC_Admin_Tests_API_Init extends WC_REST_Unit_Test_Case {
+	use ArraySubsetAsserts;
+
 	/**
 	 * Set up.
 	 */
diff --git a/plugins/woocommerce/tests/legacy/unit-tests/woocommerce-admin/batch-queue.php b/plugins/woocommerce/tests/legacy/unit-tests/woocommerce-admin/batch-queue.php
index 42406606520..eee1f28473e 100644
--- a/plugins/woocommerce/tests/legacy/unit-tests/woocommerce-admin/batch-queue.php
+++ b/plugins/woocommerce/tests/legacy/unit-tests/woocommerce-admin/batch-queue.php
@@ -8,6 +8,7 @@
 
 use Automattic\WooCommerce\Internal\Admin\Schedulers\CustomersScheduler;
 use Automattic\WooCommerce\Internal\Admin\Schedulers\OrdersScheduler;
+use DMS\PHPUnitExtensions\ArraySubset\ArraySubsetAsserts;
 
 /**
  * Reports Generation Batch Queue Test Class
@@ -16,6 +17,8 @@ use Automattic\WooCommerce\Internal\Admin\Schedulers\OrdersScheduler;
  * @since 3.5.0
  */
 class WC_Admin_Tests_Reports_Regenerate_Batching extends WC_REST_Unit_Test_Case {
+	use ArraySubsetAsserts;
+
 	/**
 	 * Queue batch size.
 	 *
diff --git a/plugins/woocommerce/tests/legacy/unit-tests/woocommerce-admin/category-lookup.php b/plugins/woocommerce/tests/legacy/unit-tests/woocommerce-admin/category-lookup.php
index ce001e434cf..90da3721054 100644
--- a/plugins/woocommerce/tests/legacy/unit-tests/woocommerce-admin/category-lookup.php
+++ b/plugins/woocommerce/tests/legacy/unit-tests/woocommerce-admin/category-lookup.php
@@ -25,7 +25,7 @@ class WC_Admin_Tests_Category_Lookup extends WP_UnitTestCase {
 	 * Setup
 	 */
 
-	public function setUp() {
+	public function setUp(): void {
 		delete_transient('wc_installing');
 		parent::setUp();
 		$parent                = wp_insert_term( 'test_parent', 'product_cat' );
diff --git a/plugins/woocommerce/tests/legacy/unit-tests/woocommerce-admin/remote-inbox-notifications/transformer-service.php b/plugins/woocommerce/tests/legacy/unit-tests/woocommerce-admin/remote-inbox-notifications/transformer-service.php
index c6264f30760..ac564a954af 100644
--- a/plugins/woocommerce/tests/legacy/unit-tests/woocommerce-admin/remote-inbox-notifications/transformer-service.php
+++ b/plugins/woocommerce/tests/legacy/unit-tests/woocommerce-admin/remote-inbox-notifications/transformer-service.php
@@ -29,18 +29,19 @@ class WC_Admin_Tests_RemoteInboxNotifications_TransformerService extends WC_Unit
 	}
 
 	/**
-	 * @expectedException InvalidArgumentException
-	 * @expectedExceptionMessage Missing required config value: use
+	 * @testdox An exception is thrown when the transformer config is missing 'use'
 	 */
 	public function test_it_throw_exception_when_transformer_config_is_missing_use() {
+		$this->expectException( InvalidArgumentException::class );
+		$this->expectExceptionMessage( 'Missing required config value: use' );
 		TransformerService::apply( array( 'value' ), array( new stdClass() ), null );
 	}
 
 	/**
-	 * @expectedException InvalidArgumentException
-	 * @expectedExceptionMessage Unable to find a transformer by name: i_do_not_exist
+	 * @testdox An exception is thrown when the transformer is not found
 	 */
 	public function test_it_throws_exception_when_transformer_is_not_found() {
+		$this->expectExceptionMessage( 'Unable to find a transformer by name: i_do_not_exist' );
 		$transformer = $this->transformer_config( 'i_do_not_exist' );
 		TransformerService::apply( array( 'value' ), array( $transformer ), null );
 	}
diff --git a/plugins/woocommerce/tests/php/includes/class-wc-emails-tests.php b/plugins/woocommerce/tests/php/includes/class-wc-emails-tests.php
index 51ede419c73..40dcf501a66 100644
--- a/plugins/woocommerce/tests/php/includes/class-wc-emails-tests.php
+++ b/plugins/woocommerce/tests/php/includes/class-wc-emails-tests.php
@@ -56,7 +56,7 @@ class WC_Emails_Tests extends \WC_Unit_Test_Case {
 		$email_object->order_meta( $order, true, true );
 		$content = ob_get_contents();
 		ob_end_clean();
-		$this->assertContains( 'dummy_key', $content );
-		$this->assertContains( 'dummy_meta_value', $content );
+		$this->assertStringContainsString( 'dummy_key', $content );
+		$this->assertStringContainsString( 'dummy_meta_value', $content );
 	}
 }
diff --git a/plugins/woocommerce/tests/php/includes/wc-attribute-functions-test.php b/plugins/woocommerce/tests/php/includes/wc-attribute-functions-test.php
index f8d13bfa516..351b43c0f54 100644
--- a/plugins/woocommerce/tests/php/includes/wc-attribute-functions-test.php
+++ b/plugins/woocommerce/tests/php/includes/wc-attribute-functions-test.php
@@ -121,15 +121,13 @@ class WC_Attribute_Functions_Test extends \WC_Unit_Test_Case {
 		$ids = array();
 
 		$ids[] = wc_create_attribute( array( 'name' => 'Brand' ) );
-		$this->assertInternalType(
-			'int',
+		$this->assertIsInt(
 			end( $ids ),
 			'wc_create_attribute should return a numeric id on success.'
 		);
 
 		$ids[] = wc_create_attribute( array( 'name' => str_repeat( 'n', 28 ) ) );
-		$this->assertInternalType(
-			'int',
+		$this->assertIsInt(
 			end( $ids ),
 			'Attribute creation should succeed when its slug is 28 characters long.'
 		);
diff --git a/plugins/woocommerce/tests/php/src/Internal/Admin/ProductReviews/ReviewsTest.php b/plugins/woocommerce/tests/php/src/Internal/Admin/ProductReviews/ReviewsTest.php
index 87204d42849..4ac9d7d2696 100644
--- a/plugins/woocommerce/tests/php/src/Internal/Admin/ProductReviews/ReviewsTest.php
+++ b/plugins/woocommerce/tests/php/src/Internal/Admin/ProductReviews/ReviewsTest.php
@@ -362,7 +362,7 @@ class ReviewsTest extends WC_Unit_Test_Case {
 		$result = $method->invoke( $reviews );
 
 		foreach ( $expected_result as $i => $expected_message ) {
-			$this->assertContains( $expected_message, $result[ $i ] );
+			$this->assertStringContainsString( $expected_message, $result[ $i ] );
 		}
 	}
 
diff --git a/plugins/woocommerce/tests/php/src/Internal/BatchProcessing/BatchProcessingControllerTests.php b/plugins/woocommerce/tests/php/src/Internal/BatchProcessing/BatchProcessingControllerTests.php
index 3bb694d9c91..9649e083266 100644
--- a/plugins/woocommerce/tests/php/src/Internal/BatchProcessing/BatchProcessingControllerTests.php
+++ b/plugins/woocommerce/tests/php/src/Internal/BatchProcessing/BatchProcessingControllerTests.php
@@ -144,7 +144,6 @@ class BatchProcessingControllerTests extends WC_Unit_Test_Case {
 	 */
 	public function test_process_single_update_unfinished() {
 		$test_process_mock = $this->getMockBuilder( get_class( $this->test_process ) )->getMock();
-		$test_process_mock->expects( $this->once() )->method( 'process_batch' )->willReturn( true );
 		$test_process_mock->method( 'get_total_pending_count' )->willReturn( 10 );
 		$test_process_mock->expects( $this->once() )->method( 'get_next_batch_to_process' )->willReturn( array( 'dummy_id' ) );
 
@@ -166,7 +165,6 @@ class BatchProcessingControllerTests extends WC_Unit_Test_Case {
 	 */
 	public function test_process_single_update_finished() {
 		$test_process_mock = $this->getMockBuilder( get_class( $this->test_process ) )->getMock();
-		$test_process_mock->expects( $this->once() )->method( 'process_batch' )->willReturn( true );
 		$test_process_mock->method( 'get_total_pending_count' )->willReturn( 0 );
 		$test_process_mock->expects( $this->once() )->method( 'get_next_batch_to_process' )->willReturn( array( 'dummy_id' ) );
 
diff --git a/plugins/woocommerce/tests/php/src/Internal/DataStores/Orders/DataSynchronizerTests.php b/plugins/woocommerce/tests/php/src/Internal/DataStores/Orders/DataSynchronizerTests.php
index c02026c4952..eb76417d9a0 100644
--- a/plugins/woocommerce/tests/php/src/Internal/DataStores/Orders/DataSynchronizerTests.php
+++ b/plugins/woocommerce/tests/php/src/Internal/DataStores/Orders/DataSynchronizerTests.php
@@ -5,11 +5,13 @@ use Automattic\WooCommerce\Internal\DataStores\Orders\DataSynchronizer;
 use Automattic\WooCommerce\Internal\DataStores\Orders\OrdersTableDataStore;
 use Automattic\WooCommerce\Internal\Features\FeaturesController;
 use Automattic\WooCommerce\RestApi\UnitTests\Helpers\OrderHelper;
+use DMS\PHPUnitExtensions\ArraySubset\ArraySubsetAsserts;
 
 /**
  * Tests for DataSynchronizer class.
  */
 class DataSynchronizerTests extends WC_Unit_Test_Case {
+	use ArraySubsetAsserts;
 
 	/**
 	 * @var DataSynchronizer
diff --git a/plugins/woocommerce/tests/php/src/Internal/Orders/MobileMessagingHandlerTest.php b/plugins/woocommerce/tests/php/src/Internal/Orders/MobileMessagingHandlerTest.php
index d2e415c8962..8c814234152 100644
--- a/plugins/woocommerce/tests/php/src/Internal/Orders/MobileMessagingHandlerTest.php
+++ b/plugins/woocommerce/tests/php/src/Internal/Orders/MobileMessagingHandlerTest.php
@@ -60,7 +60,7 @@ class MobileMessagingHandlerTest extends \WC_Unit_Test_Case {
 
 		$mobile_message = MobileMessagingHandler::prepare_mobile_message( new WC_Order(), self::BLOG_ID, $now, self::DOMAIN );
 
-		$this->assertContains(
+		$this->assertStringContainsString(
 			'href="https://woocommerce.com/mobile?blog_id=' . self::BLOG_ID . '&#038;utm_campaign=deeplinks_promote_app&#038;utm_medium=email&#038;utm_source=' . self::DOMAIN . '&#038;utm_term=' . self::BLOG_ID,
 			$mobile_message
 		);
@@ -76,7 +76,7 @@ class MobileMessagingHandlerTest extends \WC_Unit_Test_Case {
 
 		$mobile_message = MobileMessagingHandler::prepare_mobile_message( $ipp_eligible_order, self::BLOG_ID, $now, self::DOMAIN );
 
-		$this->assertContains(
+		$this->assertStringContainsString(
 			'href="https://woocommerce.com/mobile/orders/details?blog_id=' . self::BLOG_ID . '&#038;order_id=' . self::ORDER_ID . '&#038;utm_campaign=deeplinks_orders_details&#038;utm_medium=email&#038;utm_source=' . self::DOMAIN . '&#038;utm_term=' . self::BLOG_ID,
 			$mobile_message
 		);
@@ -92,7 +92,7 @@ class MobileMessagingHandlerTest extends \WC_Unit_Test_Case {
 
 		$mobile_message = MobileMessagingHandler::prepare_mobile_message( $ipp_eligible_order, self::BLOG_ID, $now, self::DOMAIN );
 
-		$this->assertContains(
+		$this->assertStringContainsString(
 			'href="https://woocommerce.com/mobile/payments?blog_id=' . self::BLOG_ID . '&#038;utm_campaign=deeplinks_payments&#038;utm_medium=email&#038;utm_source=' . self::DOMAIN . '&#038;utm_term=' . self::BLOG_ID,
 			$mobile_message
 		);
@@ -112,7 +112,7 @@ class MobileMessagingHandlerTest extends \WC_Unit_Test_Case {
 
 		$mobile_message = MobileMessagingHandler::prepare_mobile_message( $ipp_eligible_order, null, $now, self::DOMAIN );
 
-		$this->assertContains(
+		$this->assertStringContainsString(
 			'href="https://woocommerce.com/mobile/payments?blog_id=0&#038;utm_campaign=deeplinks_payments&#038;utm_medium=email&#038;utm_source=' . self::DOMAIN . '&#038;utm_term=0',
 			$mobile_message
 		);