diff --git a/x-pack/test/api_integration/config.ts b/x-pack/test/api_integration/config.ts
index e43c76d42adfa3..9cb5a134681a98 100644
--- a/x-pack/test/api_integration/config.ts
+++ b/x-pack/test/api_integration/config.ts
@@ -30,6 +30,9 @@ export async function getApiIntegrationConfig({ readConfigFile }: FtrConfigProvi
         '--xpack.ruleRegistry.write.enabled=true',
         '--xpack.ruleRegistry.write.enabled=true',
         '--xpack.ruleRegistry.write.cache.enabled=false',
+        `--xpack.securitySolution.enableExperimental=${JSON.stringify([
+          'assistantKnowledgeBaseByDefault',
+        ])}`,
         '--monitoring_collection.opentelemetry.metrics.prometheus.enabled=true',
       ],
     },
diff --git a/x-pack/test/api_integration/config_security_basic.ts b/x-pack/test/api_integration/config_security_basic.ts
index 0164e8f54f8221..f7fe695da397de 100644
--- a/x-pack/test/api_integration/config_security_basic.ts
+++ b/x-pack/test/api_integration/config_security_basic.ts
@@ -23,6 +23,9 @@ export default async function ({ readConfigFile }: FtrConfigProviderContext) {
         'xpack.license.self_generated.type=basic',
         'xpack.security.enabled=true',
         'xpack.security.authc.api_key.enabled=true',
+        `--xpack.securitySolution.enableExperimental=${JSON.stringify([
+          'assistantKnowledgeBaseByDefault',
+        ])}`,
       ],
     },
     junit: {