diff --git a/composer.json b/composer.json
index 91524472..126aa4f9 100644
--- a/composer.json
+++ b/composer.json
@@ -37,7 +37,7 @@
 		"johnpbloch/wordpress": "dev-master",
 		"phpunit/phpunit": "^9.6.13",
 		"wp-cli/wp-cli-bundle": "^2.8",
-		"wp-phpunit/wp-phpunit": "^6.3.1",
+		"wp-phpunit/wp-phpunit": "^6.4.2",
 		"xwp/wait-for": "^0.0.2",
 		"yoast/phpunit-polyfills": "^2.0"
 	},
diff --git a/composer.lock b/composer.lock
index 85555db2..0770f789 100644
--- a/composer.lock
+++ b/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": "74bd2142218035b487689a1da543dad9",
+    "content-hash": "fd8e241ee99d7fef71059ee418c42dcc",
     "packages": [
         {
             "name": "composer/installers",
@@ -6912,16 +6912,16 @@
         },
         {
             "name": "wp-phpunit/wp-phpunit",
-            "version": "6.3.1",
+            "version": "6.4.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/wp-phpunit/wp-phpunit.git",
-                "reference": "4797791a311c41d213027333e4fcc48073f77df0"
+                "reference": "aa3c8f5d1b7efc295fd2b37c7264d2356a8c1099"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/wp-phpunit/wp-phpunit/zipball/4797791a311c41d213027333e4fcc48073f77df0",
-                "reference": "4797791a311c41d213027333e4fcc48073f77df0",
+                "url": "https://api.github.com/repos/wp-phpunit/wp-phpunit/zipball/aa3c8f5d1b7efc295fd2b37c7264d2356a8c1099",
+                "reference": "aa3c8f5d1b7efc295fd2b37c7264d2356a8c1099",
                 "shasum": ""
             },
             "type": "library",
@@ -6956,7 +6956,7 @@
                 "issues": "https://github.com/wp-phpunit/issues",
                 "source": "https://github.com/wp-phpunit/wp-phpunit"
             },
-            "time": "2023-08-09T01:26:57+00:00"
+            "time": "2023-12-07T00:50:08+00:00"
         },
         {
             "name": "xwp/wait-for",