diff --git a/tests/phpunit/tests/style-engine/styleEngine.php b/tests/phpunit/tests/style-engine/styleEngine.php
index 642266a3260c5..f8d8c158f016e 100644
--- a/tests/phpunit/tests/style-engine/styleEngine.php
+++ b/tests/phpunit/tests/style-engine/styleEngine.php
@@ -6,7 +6,7 @@
  * @subpackage StyleEngine
  * @since 6.1.0
  *
- * @group styleEngine
+ * @group style-engine
  */
 
 /**
diff --git a/tests/phpunit/tests/style-engine/wpStyleEngineCssDeclarations.php b/tests/phpunit/tests/style-engine/wpStyleEngineCssDeclarations.php
index 5af1a85fa28b9..1d114d8a2e3bd 100644
--- a/tests/phpunit/tests/style-engine/wpStyleEngineCssDeclarations.php
+++ b/tests/phpunit/tests/style-engine/wpStyleEngineCssDeclarations.php
@@ -6,7 +6,7 @@
  * @subpackage StyleEngine
  * @since 6.1.0
  *
- * @group styleEngine
+ * @group style-engine
  */
 
 /**
diff --git a/tests/phpunit/tests/style-engine/wpStyleEngineCssRule.php b/tests/phpunit/tests/style-engine/wpStyleEngineCssRule.php
index 353010af3da98..1d729ed37300f 100644
--- a/tests/phpunit/tests/style-engine/wpStyleEngineCssRule.php
+++ b/tests/phpunit/tests/style-engine/wpStyleEngineCssRule.php
@@ -6,7 +6,7 @@
  * @subpackage StyleEngine
  * @since 6.1.0
  *
- * @group styleEngine
+ * @group style-engine
  */
 
 /**
diff --git a/tests/phpunit/tests/style-engine/wpStyleEngineCssRulesStore.php b/tests/phpunit/tests/style-engine/wpStyleEngineCssRulesStore.php
index 6645764d44669..84d807491c362 100644
--- a/tests/phpunit/tests/style-engine/wpStyleEngineCssRulesStore.php
+++ b/tests/phpunit/tests/style-engine/wpStyleEngineCssRulesStore.php
@@ -6,7 +6,7 @@
  * @subpackage StyleEngine
  * @since 6.1.0
  *
- * @group styleEngine
+ * @group style-engine
  */
 
 /**
diff --git a/tests/phpunit/tests/style-engine/wpStyleEngineProcessor.php b/tests/phpunit/tests/style-engine/wpStyleEngineProcessor.php
index a8db036898e2a..5690aa7d79fb0 100644
--- a/tests/phpunit/tests/style-engine/wpStyleEngineProcessor.php
+++ b/tests/phpunit/tests/style-engine/wpStyleEngineProcessor.php
@@ -6,7 +6,7 @@
  * @subpackage StyleEngine
  * @since 6.1.0
  *
- * @group styleEngine
+ * @group style-engine
  */
 
 /**