diff --git a/x-pack/test/security_solution_cypress/cypress/e2e/detection_response/detection_engine/rule_creation/threshold_rule.cy.ts b/x-pack/test/security_solution_cypress/cypress/e2e/detection_response/detection_engine/rule_creation/threshold_rule.cy.ts
index 13c8965bf3e89..074670221bedd 100644
--- a/x-pack/test/security_solution_cypress/cypress/e2e/detection_response/detection_engine/rule_creation/threshold_rule.cy.ts
+++ b/x-pack/test/security_solution_cypress/cypress/e2e/detection_response/detection_engine/rule_creation/threshold_rule.cy.ts
@@ -74,7 +74,11 @@ describe(
     tags: ['@ess', '@serverless'],
     env: {
       ftrConfig: {
-        enableExperimental: ['alertSuppressionForThresholdRuleEnabled'],
+        kbnServerArgs: [
+          `--xpack.securitySolution.enableExperimental=${JSON.stringify([
+            'alertSuppressionForThresholdRuleEnabled',
+          ])}`,
+        ],
       },
     },
   },
diff --git a/x-pack/test/security_solution_cypress/cypress/e2e/detection_response/detection_engine/rule_creation/threshold_rule_serverless_essentials.cy.ts b/x-pack/test/security_solution_cypress/cypress/e2e/detection_response/detection_engine/rule_creation/threshold_rule_serverless_essentials.cy.ts
index b990edbd0461c..5b8ec27e2c891 100644
--- a/x-pack/test/security_solution_cypress/cypress/e2e/detection_response/detection_engine/rule_creation/threshold_rule_serverless_essentials.cy.ts
+++ b/x-pack/test/security_solution_cypress/cypress/e2e/detection_response/detection_engine/rule_creation/threshold_rule_serverless_essentials.cy.ts
@@ -23,7 +23,11 @@ describe(
           { product_line: 'security', product_tier: 'essentials' },
           { product_line: 'endpoint', product_tier: 'essentials' },
         ],
-        enableExperimental: ['alertSuppressionForThresholdRuleEnabled'],
+        kbnServerArgs: [
+          `--xpack.securitySolution.enableExperimental=${JSON.stringify([
+            'alertSuppressionForThresholdRuleEnabled',
+          ])}`,
+        ],
       },
     },
   },
diff --git a/x-pack/test/security_solution_cypress/cypress/e2e/detection_response/detection_engine/rule_edit/threshold_rule.cy.ts b/x-pack/test/security_solution_cypress/cypress/e2e/detection_response/detection_engine/rule_edit/threshold_rule.cy.ts
index 2827417d62442..5eed825f99ada 100644
--- a/x-pack/test/security_solution_cypress/cypress/e2e/detection_response/detection_engine/rule_edit/threshold_rule.cy.ts
+++ b/x-pack/test/security_solution_cypress/cypress/e2e/detection_response/detection_engine/rule_edit/threshold_rule.cy.ts
@@ -43,7 +43,11 @@ describe(
     tags: ['@ess', '@serverless'],
     env: {
       ftrConfig: {
-        enableExperimental: ['alertSuppressionForThresholdRuleEnabled'],
+        kbnServerArgs: [
+          `--xpack.securitySolution.enableExperimental=${JSON.stringify([
+            'alertSuppressionForThresholdRuleEnabled',
+          ])}`,
+        ],
       },
     },
   },