diff --git a/configuration.sh b/configuration.sh
index d4e2820..fb1c52d 100644
--- a/configuration.sh
+++ b/configuration.sh
@@ -45,6 +45,9 @@ DRUPAL_TESTING_COMPOSER_NAME=${DRUPAL_TESTING_COMPOSER_NAME:-$(jq -r .name "${DR
 # vendor/myproject the project name will be myproject.
 DRUPAL_TESTING_PROJECT_NAME=${DRUPAL_TESTING_PROJECT_NAME-$(jq -r --arg FALLBACK "$(echo "${DRUPAL_TESTING_COMPOSER_NAME}" | cut -d '/' -f 2)" '.extra."installer-name" // $FALLBACK' "${DRUPAL_TESTING_PROJECT_BASEDIR}/composer.json")}
 
+# The phpunit configuration file to use. Defaults to docroot/core/phpunit.xml.dist
+DRUPAL_TESTING_TEST_CONFIGURATION=${DRUPAL_TESTING_TEST_CONFIGURATION:-""}
+
 # Path for phpunit to search for test files. Default is the current project folder.
 DRUPAL_TESTING_TEST_PATH=${DRUPAL_TESTING_TEST_PATH:-""}
 
diff --git a/lib/stages/run_tests.sh b/lib/stages/run_tests.sh
index 95da93f..7b9615b 100644
--- a/lib/stages/run_tests.sh
+++ b/lib/stages/run_tests.sh
@@ -9,7 +9,11 @@ _stage_run_tests() {
     test_location=$(get_project_location)
 
     local test_selection=""
-    local phpunit="composer exec -- phpunit --debug"
+    local phpunit="composer exec -- phpunit"
+
+    if [ "${DRUPAL_TESTING_VERBOSE}" = true ]; then
+        phpunit="${phpunit} --debug"
+    fi
 
     if [ "${DRUPAL_TESTING_PARALLEL_TESTING}" = true ]; then
         phpunit="composer exec -- paratest -p "${DRUPAL_TESTING_PARALLEL_TESTING_PROCESSES}
@@ -50,7 +54,13 @@ _stage_run_tests() {
         test_selection="${test_selection} --filter ${DRUPAL_TESTING_TEST_FILTER}"
     fi
 
-    local runtest="${phpunit} --configuration ${docroot}/core ${test_selection} ${test_location}"
+    if [[ ${DRUPAL_TESTING_TEST_CONFIGURATION} ]]; then
+        test_selection="${test_selection} --configuration ${DRUPAL_TESTING_TEST_CONFIGURATION}"
+    else
+        test_selection="${test_selection} --configuration ${docroot}/core"
+    fi
+
+    local runtest="${phpunit} ${test_selection} ${test_location}"
 
     cd "${DRUPAL_TESTING_DRUPAL_INSTALLATION_DIRECTORY}" || exit
     eval "COMPOSER_PROCESS_TIMEOUT=0 ${runtest}" || exit 1