diff --git a/tests/tasks/install_and_check.yml b/tests/tasks/install_and_check.yml
index 61d264b..a720ba8 100644
--- a/tests/tasks/install_and_check.yml
+++ b/tests/tasks/install_and_check.yml
@@ -8,6 +8,13 @@
         public: true
       when: __run_role | d(true) | bool
 
+    - name: Run postgresql role to set vars only
+      include_role:
+        name: linux-system-roles.postgresql
+        public: true
+        tasks_from: set_vars.yml
+      when: not __run_role | d(true) | bool
+
     - name: Flush handlers
       meta: flush_handlers