diff --git a/server/src/test/java/org/opensearch/common/util/FeatureFlagTests.java b/server/src/test/java/org/opensearch/common/util/FeatureFlagTests.java
index c1c15a6cc84e6..88cb3782252b7 100644
--- a/server/src/test/java/org/opensearch/common/util/FeatureFlagTests.java
+++ b/server/src/test/java/org/opensearch/common/util/FeatureFlagTests.java
@@ -13,6 +13,7 @@
 import org.opensearch.test.OpenSearchTestCase;
 
 import static org.opensearch.common.util.FeatureFlags.DATETIME_FORMATTER_CACHING;
+import static org.opensearch.common.util.FeatureFlags.EXTENSIONS;
 import static org.opensearch.common.util.FeatureFlags.IDENTITY;
 
 public class FeatureFlagTests extends OpenSearchTestCase {
@@ -57,4 +58,13 @@ public void testBooleanFeatureFlagInitializedWithEmptySettingsAndDefaultSetToTru
         assertNotNull(testFlag);
         assertTrue(FeatureFlags.isEnabled(testFlag));
     }
+
+    public void testInitializeFeatureFlagsWithExperimentalSettings() {
+        FeatureFlags.initializeFeatureFlags(Settings.builder().put(IDENTITY, true).build());
+        assertTrue(FeatureFlags.isEnabled(IDENTITY));
+        assertTrue(FeatureFlags.isEnabled(DATETIME_FORMATTER_CACHING));
+        assertFalse(FeatureFlags.isEnabled(EXTENSIONS));
+        // reset FeatureFlags to defaults
+        FeatureFlags.initializeFeatureFlags(Settings.EMPTY);
+    }
 }