diff --git a/testing/infra/terraform/modules/standalone_apm_server/apm-server.yml.tftpl b/testing/infra/terraform/modules/standalone_apm_server/apm-server.yml.tftpl
index 747e75f41d..20b1b27936 100644
--- a/testing/infra/terraform/modules/standalone_apm_server/apm-server.yml.tftpl
+++ b/testing/infra/terraform/modules/standalone_apm_server/apm-server.yml.tftpl
@@ -15,7 +15,7 @@ apm-server:
       enabled: ${apm_server_tail_sampling}
       storage_limit: ${apm_server_tail_sampling_storage_limit}
       policies:
-        - sampling_rate: 0.1
+        - sample_rate: 0.1
 output:
   elasticsearch:
     hosts: [ ${elasticsearch_url} ]
diff --git a/testing/infra/terraform/modules/standalone_apm_server/elastic-agent.yml.tftpl b/testing/infra/terraform/modules/standalone_apm_server/elastic-agent.yml.tftpl
index ef438630e5..dac0a7e034 100644
--- a/testing/infra/terraform/modules/standalone_apm_server/elastic-agent.yml.tftpl
+++ b/testing/infra/terraform/modules/standalone_apm_server/elastic-agent.yml.tftpl
@@ -30,7 +30,7 @@ inputs:
           enabled: ${apm_server_tail_sampling}
           storage_limit: ${apm_server_tail_sampling_storage_limit}
           policies:
-            - sampling_rate: 0.1
+            - sample_rate: 0.1
     logging.level: debug
     logging.to_files: true
     logging.files: