diff --git a/x-pack/plugins/security_solution/server/lib/detection_engine/rules/bulk_actions/rule_params_modifier.test.ts b/x-pack/plugins/security_solution/server/lib/detection_engine/rules/bulk_actions/rule_params_modifier.test.ts
index e83fc53c20cf5..c3b4fe0f20134 100644
--- a/x-pack/plugins/security_solution/server/lib/detection_engine/rules/bulk_actions/rule_params_modifier.test.ts
+++ b/x-pack/plugins/security_solution/server/lib/detection_engine/rules/bulk_actions/rule_params_modifier.test.ts
@@ -50,8 +50,7 @@ describe('ruleParamsModifier', () => {
     expect(editedRuleParams).toHaveProperty('version', ruleParamsMock.version + 1);
   });
 
-  // FLAKY: https://github.com/elastic/kibana/issues/138409
-  describe.skip('index_patterns', () => {
+  describe('index_patterns', () => {
     test('should add new index pattern to rule', () => {
       const editedRuleParams = ruleParamsModifier(ruleParamsMock, [
         {