diff --git a/modules/ingest-geoip/src/test/java/org/opensearch/ingest/geoip/IngestGeoIpModulePluginTests.java b/modules/ingest-geoip/src/test/java/org/opensearch/ingest/geoip/IngestGeoIpModulePluginTests.java
index 9446ec1228532..ac6b87aefb3ec 100644
--- a/modules/ingest-geoip/src/test/java/org/opensearch/ingest/geoip/IngestGeoIpModulePluginTests.java
+++ b/modules/ingest-geoip/src/test/java/org/opensearch/ingest/geoip/IngestGeoIpModulePluginTests.java
@@ -35,6 +35,7 @@
 import com.maxmind.geoip2.model.AbstractResponse;
 
 import org.opensearch.common.network.InetAddresses;
+import org.opensearch.common.settings.Setting;
 import org.opensearch.common.settings.Settings;
 import org.opensearch.env.TestEnvironment;
 import org.opensearch.ingest.Processor;
@@ -126,6 +127,12 @@ public void testAllowListNotSpecified() throws IOException {
         }
     }
 
+    public void testSettingsRegistration() {
+        final IngestGeoIpModulePlugin plugin = new IngestGeoIpModulePlugin();
+        final List<Setting<?>> settings = plugin.getSettings();
+        assertTrue(settings.contains(IngestGeoIpModulePlugin.PROCESSORS_ALLOWLIST_SETTING));
+    }
+
     private void runAllowListTest(List<String> allowList) throws IOException {
         Settings.Builder settingsBuilder = Settings.builder();
         createDb(settingsBuilder);
diff --git a/modules/ingest-user-agent/src/main/java/org/opensearch/ingest/useragent/IngestUserAgentModulePlugin.java b/modules/ingest-user-agent/src/main/java/org/opensearch/ingest/useragent/IngestUserAgentModulePlugin.java
index bac90d20b44e1..f5e2e34278880 100644
--- a/modules/ingest-user-agent/src/main/java/org/opensearch/ingest/useragent/IngestUserAgentModulePlugin.java
+++ b/modules/ingest-user-agent/src/main/java/org/opensearch/ingest/useragent/IngestUserAgentModulePlugin.java
@@ -44,6 +44,7 @@
 import java.nio.file.Path;
 import java.nio.file.PathMatcher;
 import java.nio.file.StandardOpenOption;
+import java.util.Arrays;
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.List;
@@ -152,6 +153,6 @@ static Map<String, UserAgentParser> createUserAgentParsers(Path userAgentConfigD
 
     @Override
     public List<Setting<?>> getSettings() {
-        return Collections.singletonList(CACHE_SIZE_SETTING);
+        return Arrays.asList(CACHE_SIZE_SETTING, PROCESSORS_ALLOWLIST_SETTING);
     }
 }
diff --git a/modules/ingest-user-agent/src/test/java/org/opensearch/ingest/useragent/IngestUserAgentModulePluginTests.java b/modules/ingest-user-agent/src/test/java/org/opensearch/ingest/useragent/IngestUserAgentModulePluginTests.java
index 31fdafff1188a..563158026c37f 100644
--- a/modules/ingest-user-agent/src/test/java/org/opensearch/ingest/useragent/IngestUserAgentModulePluginTests.java
+++ b/modules/ingest-user-agent/src/test/java/org/opensearch/ingest/useragent/IngestUserAgentModulePluginTests.java
@@ -8,6 +8,7 @@
 
 package org.opensearch.ingest.useragent;
 
+import org.opensearch.common.settings.Setting;
 import org.opensearch.common.settings.Settings;
 import org.opensearch.env.TestEnvironment;
 import org.opensearch.ingest.Processor;
@@ -89,6 +90,12 @@ public void testAllowListNotSpecified() throws IOException {
         }
     }
 
+    public void testSettingsRegistration() {
+        final IngestUserAgentModulePlugin plugin = new IngestUserAgentModulePlugin();
+        final List<Setting<?>> settings = plugin.getSettings();
+        assertTrue(settings.contains(IngestUserAgentModulePlugin.PROCESSORS_ALLOWLIST_SETTING));
+    }
+
     private void runAllowListTest(List<String> allowList) throws IOException {
         final Settings settings = settingsBuilder.putList(IngestUserAgentModulePlugin.PROCESSORS_ALLOWLIST_SETTING.getKey(), allowList)
             .build();