diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index a2dd6c17311143a1a596225c5630939ed7d1d789..a00dc149d5f43bac319cab5a43e2061208d008da 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -61,6 +61,7 @@ variables:
   OPT_IN_TEST_NEXT_MINOR: '1'
   OPT_IN_TEST_MAX_PHP: '1'
   OPT_IN_TEST_NEXT_MAJOR: '1'
+  OPT_IN_TEST_PREVIOUS_MAJOR: '1'
 
 phpunit:
   variables: