diff --git a/core/modules/comment/tests/src/Functional/Rest/CommentXmlAnonTest.php b/core/modules/comment/tests/src/Functional/Rest/CommentXmlAnonTest.php
index b0eab80dda0ed6d3c3430bf2e125b295885d2175..136435ff2b0af0af15665355de9e8d2c53bf5b9e 100644
--- a/core/modules/comment/tests/src/Functional/Rest/CommentXmlAnonTest.php
+++ b/core/modules/comment/tests/src/Functional/Rest/CommentXmlAnonTest.php
@@ -9,7 +9,6 @@
 
 /**
  * @group rest
- * @group #slow
  */
 class CommentXmlAnonTest extends CommentResourceTestBase {
 
diff --git a/core/modules/comment/tests/src/Functional/Rest/CommentXmlBasicAuthTest.php b/core/modules/comment/tests/src/Functional/Rest/CommentXmlBasicAuthTest.php
index ed8f3ee70d3d7ca599b53933643d2f2b73e87326..e898c9747f2e510b2086e4050463a46082e27b3e 100644
--- a/core/modules/comment/tests/src/Functional/Rest/CommentXmlBasicAuthTest.php
+++ b/core/modules/comment/tests/src/Functional/Rest/CommentXmlBasicAuthTest.php
@@ -9,7 +9,6 @@
 
 /**
  * @group rest
- * @group #slow
  */
 class CommentXmlBasicAuthTest extends CommentResourceTestBase {
 
diff --git a/core/modules/comment/tests/src/Functional/Rest/CommentXmlCookieTest.php b/core/modules/comment/tests/src/Functional/Rest/CommentXmlCookieTest.php
index a382a8bd4c5ab17f1d32f4c3c455b6a09ff4ccca..0bb6c6daef0e3e68465d2e85d7f6e718931dc911 100644
--- a/core/modules/comment/tests/src/Functional/Rest/CommentXmlCookieTest.php
+++ b/core/modules/comment/tests/src/Functional/Rest/CommentXmlCookieTest.php
@@ -9,7 +9,6 @@
 
 /**
  * @group rest
- * @group #slow
  */
 class CommentXmlCookieTest extends CommentResourceTestBase {
 
diff --git a/core/modules/file/tests/src/Functional/Formatter/FileAudioFormatterTest.php b/core/modules/file/tests/src/Functional/Formatter/FileAudioFormatterTest.php
index a4591ed353c94cea5e9e199506552bacf7ac37f6..3564bf1ed8b919a14ce7630fc68244e27fb76d3b 100644
--- a/core/modules/file/tests/src/Functional/Formatter/FileAudioFormatterTest.php
+++ b/core/modules/file/tests/src/Functional/Formatter/FileAudioFormatterTest.php
@@ -10,6 +10,7 @@
 /**
  * @coversDefaultClass \Drupal\file\Plugin\Field\FieldFormatter\FileAudioFormatter
  * @group file
+ * @group #slow
  */
 class FileAudioFormatterTest extends FileMediaFormatterTestBase {
 
diff --git a/core/modules/file/tests/src/Functional/Formatter/FileVideoFormatterTest.php b/core/modules/file/tests/src/Functional/Formatter/FileVideoFormatterTest.php
index 651fefdff9c9166cea7627ca06e1147d15be74a2..a9a20518d96e696c2ca73075ee948e0d2bd55a36 100644
--- a/core/modules/file/tests/src/Functional/Formatter/FileVideoFormatterTest.php
+++ b/core/modules/file/tests/src/Functional/Formatter/FileVideoFormatterTest.php
@@ -10,6 +10,7 @@
 /**
  * @coversDefaultClass \Drupal\file\Plugin\Field\FieldFormatter\FileVideoFormatter
  * @group file
+ * @group #slow
  */
 class FileVideoFormatterTest extends FileMediaFormatterTestBase {
 
diff --git a/core/modules/user/tests/src/Functional/Rest/UserXmlAnonTest.php b/core/modules/user/tests/src/Functional/Rest/UserXmlAnonTest.php
index 436ad727eaf952b8eb1f48a53fc32a7e5f47cc7a..fc16b66c65475c73fc58040b4fe816691356c8d3 100644
--- a/core/modules/user/tests/src/Functional/Rest/UserXmlAnonTest.php
+++ b/core/modules/user/tests/src/Functional/Rest/UserXmlAnonTest.php
@@ -9,7 +9,6 @@
 
 /**
  * @group rest
- * @group #slow
  */
 class UserXmlAnonTest extends UserResourceTestBase {
 
diff --git a/core/modules/user/tests/src/Functional/Rest/UserXmlBasicAuthTest.php b/core/modules/user/tests/src/Functional/Rest/UserXmlBasicAuthTest.php
index 9ffe31296118f3eb1d4898b13f7edac569b83912..dbc2eb9cf9d7b921ce97cea501eb162b64ee6351 100644
--- a/core/modules/user/tests/src/Functional/Rest/UserXmlBasicAuthTest.php
+++ b/core/modules/user/tests/src/Functional/Rest/UserXmlBasicAuthTest.php
@@ -9,7 +9,6 @@
 
 /**
  * @group rest
- * @group #slow
  */
 class UserXmlBasicAuthTest extends UserResourceTestBase {
 
diff --git a/core/modules/user/tests/src/Functional/Rest/UserXmlCookieTest.php b/core/modules/user/tests/src/Functional/Rest/UserXmlCookieTest.php
index cf63ccbff179fa6281484b947346debe22256f8b..9f074598c3cee550cabddf50bec92d52fe66ce0e 100644
--- a/core/modules/user/tests/src/Functional/Rest/UserXmlCookieTest.php
+++ b/core/modules/user/tests/src/Functional/Rest/UserXmlCookieTest.php
@@ -9,7 +9,6 @@
 
 /**
  * @group rest
- * @group #slow
  */
 class UserXmlCookieTest extends UserResourceTestBase {
 
diff --git a/core/modules/user/tests/src/Functional/UserCancelTest.php b/core/modules/user/tests/src/Functional/UserCancelTest.php
index 7ee8ba2752b0e8937d333e3a869cb807e5cf268e..81ad7ac8e097d86363427b280abcdffb733f000b 100644
--- a/core/modules/user/tests/src/Functional/UserCancelTest.php
+++ b/core/modules/user/tests/src/Functional/UserCancelTest.php
@@ -17,6 +17,7 @@
  * Ensure that account cancellation methods work as expected.
  *
  * @group user
+ * @group #slow
  */
 class UserCancelTest extends BrowserTestBase {
 
diff --git a/core/modules/user/tests/src/Functional/UserPasswordResetTest.php b/core/modules/user/tests/src/Functional/UserPasswordResetTest.php
index 21cbfd5639a13062d0f60c639f56f6fc8b2750a2..344e7100c24516c8855fb7ae6aa4b903686c01d2 100644
--- a/core/modules/user/tests/src/Functional/UserPasswordResetTest.php
+++ b/core/modules/user/tests/src/Functional/UserPasswordResetTest.php
@@ -16,6 +16,7 @@
  * Ensure that password reset methods work as expected.
  *
  * @group user
+ * @group #slow
  */
 class UserPasswordResetTest extends BrowserTestBase {
 
diff --git a/core/modules/user/tests/src/Functional/UserRegistrationTest.php b/core/modules/user/tests/src/Functional/UserRegistrationTest.php
index 5aac6f11f9e45e9dd8d6c39016b5243885dd0640..f55251fc4111002704a5df180a50ac5fdfda0f26 100644
--- a/core/modules/user/tests/src/Functional/UserRegistrationTest.php
+++ b/core/modules/user/tests/src/Functional/UserRegistrationTest.php
@@ -15,6 +15,7 @@
  * Tests registration of user under different configurations.
  *
  * @group user
+ * @group #slow
  */
 class UserRegistrationTest extends BrowserTestBase {
 
diff --git a/core/modules/views_ui/tests/src/Functional/FilterUITest.php b/core/modules/views_ui/tests/src/Functional/FilterUITest.php
index 7891d6df02ae5613c417f0345b42868af72ff247..d4fe5dc655ff91abd0a1870c336978c5d3a06061 100644
--- a/core/modules/views_ui/tests/src/Functional/FilterUITest.php
+++ b/core/modules/views_ui/tests/src/Functional/FilterUITest.php
@@ -8,6 +8,7 @@
  * Tests for the filters from the UI.
  *
  * @group views_ui
+ * @group #slow
  */
 class FilterUITest extends UITestBase {