Issue #1843442 by ACF: Change the dependencies variable to the state system.

core/modules/system/lib/Drupal/system/Tests/Module/VersionTest.php

@@ -62,7 +62,7 @@ function testModuleVersions() {
       // Testing extra version. Incompatible.
       'common_test (>2.4-rc0)',
     );
-    variable_set('dependencies', $dependencies);
+    state()->set('system_test.dependencies', $dependencies);
     $n = count($dependencies);
     for ($i = 0; $i < $n; $i++) {
       $this->drupalGet('admin/modules');

core/modules/system/tests/modules/system_test/system_test.module

@@ -247,11 +247,11 @@ function system_test_exit() {
 function system_test_system_info_alter(&$info, $file, $type) {
   // We need a static otherwise the last test will fail to alter common_test.
   static $test;
-  if (($dependencies = variable_get('dependencies', array())) || $test) {
+  if (($dependencies = state()->get('system_test.dependencies')) || $test) {
     if ($file->name == 'module_test') {
       $info['hidden'] = FALSE;
       $info['dependencies'][] = array_shift($dependencies);
-      variable_set('dependencies', $dependencies);
+      state()->set('system_test.dependencies', $dependencies);
       $test = TRUE;
     }
     if ($file->name == 'common_test') {