diff --git a/qa/smoke-test-multinode/src/yamlRestTest/java/org/elasticsearch/smoketest/SmokeTestMultiNodeClientYamlTestSuiteIT.java b/qa/smoke-test-multinode/src/yamlRestTest/java/org/elasticsearch/smoketest/SmokeTestMultiNodeClientYamlTestSuiteIT.java
index e53c0564be297..5943d4a86ab92 100644
--- a/qa/smoke-test-multinode/src/yamlRestTest/java/org/elasticsearch/smoketest/SmokeTestMultiNodeClientYamlTestSuiteIT.java
+++ b/qa/smoke-test-multinode/src/yamlRestTest/java/org/elasticsearch/smoketest/SmokeTestMultiNodeClientYamlTestSuiteIT.java
@@ -36,6 +36,7 @@ public class SmokeTestMultiNodeClientYamlTestSuiteIT extends ESClientYamlSuiteTe
         .node(0, n -> n.setting("node.roles", "[master,data,ml,remote_cluster_client,transform]"))
         .feature(FeatureFlag.TIME_SERIES_MODE)
         .feature(FeatureFlag.SUB_OBJECTS_AUTO_ENABLED)
+        .feature(FeatureFlag.INDEX_RECOVERY_USE_SYNTHETIC_SOURCE)
         .build();
 
     public SmokeTestMultiNodeClientYamlTestSuiteIT(@Name("yaml") ClientYamlTestCandidate testCandidate) {
diff --git a/rest-api-spec/src/yamlRestTest/java/org/elasticsearch/test/rest/ClientYamlTestSuiteIT.java b/rest-api-spec/src/yamlRestTest/java/org/elasticsearch/test/rest/ClientYamlTestSuiteIT.java
index a92f5df53aeec..1a70797d8f101 100644
--- a/rest-api-spec/src/yamlRestTest/java/org/elasticsearch/test/rest/ClientYamlTestSuiteIT.java
+++ b/rest-api-spec/src/yamlRestTest/java/org/elasticsearch/test/rest/ClientYamlTestSuiteIT.java
@@ -37,6 +37,7 @@ public class ClientYamlTestSuiteIT extends ESClientYamlSuiteTestCase {
         .module("data-streams")
         .feature(FeatureFlag.TIME_SERIES_MODE)
         .feature(FeatureFlag.SUB_OBJECTS_AUTO_ENABLED)
+        .feature(FeatureFlag.INDEX_RECOVERY_USE_SYNTHETIC_SOURCE)
         .build();
 
     public ClientYamlTestSuiteIT(@Name("yaml") ClientYamlTestCandidate testCandidate) {
diff --git a/test/test-clusters/src/main/java/org/elasticsearch/test/cluster/FeatureFlag.java b/test/test-clusters/src/main/java/org/elasticsearch/test/cluster/FeatureFlag.java
index 11787866af0d7..013a502d93cef 100644
--- a/test/test-clusters/src/main/java/org/elasticsearch/test/cluster/FeatureFlag.java
+++ b/test/test-clusters/src/main/java/org/elasticsearch/test/cluster/FeatureFlag.java
@@ -18,7 +18,12 @@
 public enum FeatureFlag {
     TIME_SERIES_MODE("es.index_mode_feature_flag_registered=true", Version.fromString("8.0.0"), null),
     FAILURE_STORE_ENABLED("es.failure_store_feature_flag_enabled=true", Version.fromString("8.12.0"), null),
-    SUB_OBJECTS_AUTO_ENABLED("es.sub_objects_auto_feature_flag_enabled=true", Version.fromString("8.16.0"), null);
+    SUB_OBJECTS_AUTO_ENABLED("es.sub_objects_auto_feature_flag_enabled=true", Version.fromString("8.16.0"), null),
+    INDEX_RECOVERY_USE_SYNTHETIC_SOURCE(
+        "es.index_recovery_use_synthetic_source_feature_flag_enabled=true",
+        Version.fromString("8.18.0"),
+        null
+    );
 
     public final String systemProperty;
     public final Version from;
diff --git a/x-pack/plugin/logsdb/src/yamlRestTest/java/org/elasticsearch/xpack/logsdb/LogsdbTestSuiteIT.java b/x-pack/plugin/logsdb/src/yamlRestTest/java/org/elasticsearch/xpack/logsdb/LogsdbTestSuiteIT.java
index fcac791cb2057..a683305c9fde3 100644
--- a/x-pack/plugin/logsdb/src/yamlRestTest/java/org/elasticsearch/xpack/logsdb/LogsdbTestSuiteIT.java
+++ b/x-pack/plugin/logsdb/src/yamlRestTest/java/org/elasticsearch/xpack/logsdb/LogsdbTestSuiteIT.java
@@ -11,6 +11,7 @@
 import com.carrotsearch.randomizedtesting.annotations.ParametersFactory;
 
 import org.elasticsearch.test.cluster.ElasticsearchCluster;
+import org.elasticsearch.test.cluster.FeatureFlag;
 import org.elasticsearch.test.cluster.local.distribution.DistributionType;
 import org.elasticsearch.test.rest.yaml.ClientYamlTestCandidate;
 import org.elasticsearch.test.rest.yaml.ESClientYamlSuiteTestCase;
@@ -23,6 +24,7 @@ public class LogsdbTestSuiteIT extends ESClientYamlSuiteTestCase {
         .distribution(DistributionType.DEFAULT)
         .setting("xpack.security.enabled", "false")
         .setting("xpack.license.self_generated.type", "trial")
+        .feature(FeatureFlag.INDEX_RECOVERY_USE_SYNTHETIC_SOURCE)
         .build();
 
     public LogsdbTestSuiteIT(@Name("yaml") ClientYamlTestCandidate testCandidate) {
diff --git a/x-pack/qa/core-rest-tests-with-security/src/yamlRestTest/java/org/elasticsearch/xpack/security/CoreWithSecurityClientYamlTestSuiteIT.java b/x-pack/qa/core-rest-tests-with-security/src/yamlRestTest/java/org/elasticsearch/xpack/security/CoreWithSecurityClientYamlTestSuiteIT.java
index 94eeee5ed9298..16baa729d9703 100644
--- a/x-pack/qa/core-rest-tests-with-security/src/yamlRestTest/java/org/elasticsearch/xpack/security/CoreWithSecurityClientYamlTestSuiteIT.java
+++ b/x-pack/qa/core-rest-tests-with-security/src/yamlRestTest/java/org/elasticsearch/xpack/security/CoreWithSecurityClientYamlTestSuiteIT.java
@@ -50,6 +50,7 @@ public class CoreWithSecurityClientYamlTestSuiteIT extends ESClientYamlSuiteTest
         .user(USER, PASS)
         .feature(FeatureFlag.TIME_SERIES_MODE)
         .feature(FeatureFlag.SUB_OBJECTS_AUTO_ENABLED)
+        .feature(FeatureFlag.INDEX_RECOVERY_USE_SYNTHETIC_SOURCE)
         .build();
 
     public CoreWithSecurityClientYamlTestSuiteIT(@Name("yaml") ClientYamlTestCandidate testCandidate) {