diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 7bb6c457c139d8043ca11b1fde664a970927eae6..51765bb7a13648bb08cff63e836743634e2b0e28 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -52,7 +52,7 @@ variables:
   _CSPELL_FLAGWORDS: please
   _CSPELL_IGNORE_PATHS: ./phpcs.xml
   # Use these to test against other versions of Drupal:
-#  OPT_IN_TEST_PREVIOUS_MINOR: '1'
+  OPT_IN_TEST_PREVIOUS_MINOR: '1'
 #  OPT_IN_TEST_PREVIOUS_MAJOR: '1'
 #  OPT_IN_TEST_NEXT_MINOR: '1'
 #  OPT_IN_TEST_NEXT_MAJOR: '1'
diff --git a/.ignored-deprecations.txt b/.ignored-deprecations.txt
index 9b412086d7c341de862de2b6f3f8b96e3758e0b2..7ef5265de1dbf854acad9676d9f57e0cbed84b1d 100644
--- a/.ignored-deprecations.txt
+++ b/.ignored-deprecations.txt
@@ -31,6 +31,9 @@
 
 # Twig 3.
 %Since twig/twig 3.12: Twig Filter "spaceless" is deprecated%
+%Since twig/twig 3.15: Instantiating "Twig\\Node\\Node" directly is deprecated; the class will become abstract in 4.0.%
+%Since twig/twig 3.15: Using the "deprecated", "deprecating_package", and "alternative" options is deprecated, pass a "deprecation_info" one instead.%
+%Since twig/twig 3.15: The "Twig\\Node\\Expression\\NameExpression" class is deprecated, use "Twig\\Node\\Expression\\Variable\\ContextVariable" instead.%
 
 # Search API hooks
 %^The deprecated (alter )?hook hook_search_api_%