diff --git a/google-cloud-datastore/src/main/java/com/google/cloud/datastore/testing/LocalDatastoreHelper.java b/google-cloud-datastore/src/main/java/com/google/cloud/datastore/testing/LocalDatastoreHelper.java
index d486ff250999..a7ea5bbc938e 100644
--- a/google-cloud-datastore/src/main/java/com/google/cloud/datastore/testing/LocalDatastoreHelper.java
+++ b/google-cloud-datastore/src/main/java/com/google/cloud/datastore/testing/LocalDatastoreHelper.java
@@ -16,6 +16,7 @@
 
 package com.google.cloud.datastore.testing;
 
+import com.google.api.core.InternalApi;
 import com.google.cloud.NoCredentials;
 import com.google.cloud.ServiceOptions;
 import com.google.cloud.datastore.DatastoreOptions;
@@ -42,7 +43,10 @@
 
 /**
  * Utility to start and stop local Google Cloud Datastore process.
+ * 
+ * Internal testing use only
  */
+@InternalApi
 public class LocalDatastoreHelper extends BaseEmulatorHelper<DatastoreOptions> {
 
   private final List<EmulatorRunner> emulatorRunners;
diff --git a/google-cloud-datastore/src/main/java/com/google/cloud/datastore/testing/RemoteDatastoreHelper.java b/google-cloud-datastore/src/main/java/com/google/cloud/datastore/testing/RemoteDatastoreHelper.java
index 7a78e68df233..10b4fa98de2c 100644
--- a/google-cloud-datastore/src/main/java/com/google/cloud/datastore/testing/RemoteDatastoreHelper.java
+++ b/google-cloud-datastore/src/main/java/com/google/cloud/datastore/testing/RemoteDatastoreHelper.java
@@ -17,6 +17,7 @@
 package com.google.cloud.datastore.testing;
 
 import com.google.cloud.HttpTransportOptions;
+import com.google.api.core.InternalApi;
 import com.google.api.gax.core.RetrySettings;
 import com.google.cloud.datastore.Datastore;
 import com.google.cloud.datastore.DatastoreOptions;
@@ -41,7 +42,10 @@
  * {@link HttpTransportOptions#getConnectTimeout()} and
  * {@link HttpTransportOptions#getReadTimeout()} are both
  * both set to {@code 60000}.
+ * 
+ * Internal testing use only
  */
+@InternalApi
 public class RemoteDatastoreHelper {
 
   private final DatastoreOptions options;