diff --git a/configuration.sh b/configuration.sh
index db42a7a..c6685a3 100644
--- a/configuration.sh
+++ b/configuration.sh
@@ -22,6 +22,9 @@ DRUPAL_TESTING_PROJECT_TYPE=${DRUPAL_TESTING_PROJECT_TYPE:-$(jq -er '.type // "p
 
 # Setting this to a filename, creates a dump from an installation, that can be used by all tests, instead of reinstalling
 # for every test. This is currently supported only by the thunder distribution.
+# The behavior differs based on the file extension:
+# - .php: Only the database php dump will be created and used.
+# - .tar.gz: A tar will be created, that contains the database php dump and the files directory.
 DRUPAL_TESTING_TEST_DUMP_FILE=${DRUPAL_TESTING_TEST_DUMP_FILE:-""}
 
 # The drupal profile that is used in the tests.
diff --git a/lib/stages/install.sh b/lib/stages/install.sh
index bf0be0f..328b3b4 100644
--- a/lib/stages/install.sh
+++ b/lib/stages/install.sh
@@ -37,9 +37,14 @@ _stage_install() {
     fi
     cd - || exit
 
-    if [[ ${DRUPAL_TESTING_TEST_DUMP_FILE} != "" ]]; then
-        cd "${docroot}" || exit
-        php core/scripts/db-tools.php dump-database-d8-mysql --database-url "${SIMPLETEST_DB}" >"${docroot}/${DRUPAL_TESTING_TEST_DUMP_FILE}"
-        cd - || exit
+    cd "${docroot}" || exit
+    if [[ ${DRUPAL_TESTING_TEST_DUMP_FILE} == *.php  ]]; then
+        php core/scripts/db-tools.php dump-database-d8-mysql --database-url "${SIMPLETEST_DB}" >"${DRUPAL_TESTING_TEST_DUMP_FILE}"
+    elif [[ ${DRUPAL_TESTING_TEST_DUMP_FILE} == *.tar.gz ]]; then
+        php core/scripts/db-tools.php dump-database-d8-mysql --database-url "${SIMPLETEST_DB}" >"sites/default/database-dump.php"
+        # Gzip sites/default files directory but exclude config_*, php and styles directories.
+        tar -czf "${DRUPAL_TESTING_TEST_DUMP_FILE}" --exclude='config_*' --exclude='php' --exclude='styles' --directory='sites/default' files database-dump.php
     fi
+    cd - || exit
+
 }
diff --git a/lib/stages/prepare_build.sh b/lib/stages/prepare_build.sh
index 0c24e36..fc602b5 100644
--- a/lib/stages/prepare_build.sh
+++ b/lib/stages/prepare_build.sh
@@ -35,7 +35,7 @@ _stage_prepare_build() {
         composer require oomphinc/composer-installers-extender --no-update --working-dir="${DRUPAL_TESTING_DRUPAL_INSTALLATION_DIRECTORY}"
     fi
 
-    composer require drush/drush:"^11" --no-update --working-dir="${DRUPAL_TESTING_DRUPAL_INSTALLATION_DIRECTORY}"
+    composer require drush/drush:"^11.2.0" --no-update --working-dir="${DRUPAL_TESTING_DRUPAL_INSTALLATION_DIRECTORY}"
     composer require phpspec/prophecy-phpunit:^2 --dev --no-update --working-dir="${DRUPAL_TESTING_DRUPAL_INSTALLATION_DIRECTORY}"
 
     # Require phpstan.