diff --git a/google-cloud-language/pom.xml b/google-cloud-language/pom.xml
index da555089..d7dc7ff7 100644
--- a/google-cloud-language/pom.xml
+++ b/google-cloud-language/pom.xml
@@ -57,10 +57,12 @@
     <dependency>
       <groupId>com.google.api</groupId>
       <artifactId>gax</artifactId>
+      <version>2.19.5</version>
     </dependency>
     <dependency>
       <groupId>com.google.api</groupId>
       <artifactId>gax-grpc</artifactId>
+      <version>2.19.5</version>
     </dependency>
     <dependency>
       <groupId>com.google.api</groupId>
diff --git a/google-cloud-language/src/test/java/com/google/cloud/language/v1/SampleTest.java b/google-cloud-language/src/test/java/com/google/cloud/language/v1/SampleTest.java
new file mode 100644
index 00000000..88a6b805
--- /dev/null
+++ b/google-cloud-language/src/test/java/com/google/cloud/language/v1/SampleTest.java
@@ -0,0 +1,89 @@
+/*
+ * Copyright 2021 Google LLC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      https://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.cloud.language.v1;
+
+import com.google.cloud.language.v1.Document.Type;
+import com.google.api.gax.core.FixedCredentialsProvider;
+import com.google.api.gax.grpc.InstantiatingGrpcChannelProvider;
+import com.google.api.gax.rpc.FixedHeaderProvider;
+import com.google.api.gax.rpc.HeaderProvider;
+import com.google.api.gax.rpc.TransportChannelProvider;
+import com.google.cloud.language.v1.LanguageServiceSettings;
+
+import java.util.HashMap;
+import java.util.Map;
+
+import org.junit.Test;
+
+public class SampleTest {
+
+  // Create a client by providing API key to stubsettings.
+  // public LanguageServiceClient createClientWithApiKey(String apiKey) throws Exception {
+  //   LanguageServiceSettings settings = LanguageServiceSettings
+  //       .newBuilder().setApiKey(apiKey).build();
+  //   LanguageServiceClient client = LanguageServiceClient.create(settings);
+  //   return client;
+  // }
+
+  public LanguageServiceClient createClientWithApiKey2(String apiKey) throws Exception {
+    // Manually set the api key header
+    Map<String, String> header = new HashMap<String, String>() { {put("x-goog-api-key", apiKey);}};
+    FixedHeaderProvider headerProvider = FixedHeaderProvider.create(header);
+
+    // Use empty credential, otherwise it will raise ADC not set error
+    FixedCredentialsProvider credentialProvider = FixedCredentialsProvider.create(null);
+
+    // Create the client
+    TransportChannelProvider transportChannelProvider = InstantiatingGrpcChannelProvider.newBuilder().setHeaderProvider(headerProvider).build();
+    LanguageServiceSettings settings = LanguageServiceSettings.newBuilder().setTransportChannelProvider(transportChannelProvider).setCredentialsProvider(credentialProvider).build();
+    LanguageServiceClient client = LanguageServiceClient.create(settings);
+    return client;
+  }
+
+  @Test
+  public void analyzeSentimentTest() throws Exception {
+    // LanguageServiceClient client = createClientWithApiKey("<FILL IN THE API KEY>");
+    LanguageServiceClient client = createClientWithApiKey2("<FILL IN THE API KEY>");
+    
+
+    // set the GCS Content URI path to the file to be analyzed
+    Document doc =
+        Document.newBuilder().setContent("123\n456").setType(Type.PLAIN_TEXT).build();
+    AnalyzeEntitiesRequest request =
+        AnalyzeEntitiesRequest.newBuilder()
+            .setDocument(doc)
+            .setEncodingType(EncodingType.UTF16)
+            .build();
+
+    AnalyzeEntitiesResponse response = client.analyzeEntities(request);
+
+    // Print the response
+    for (Entity entity : response.getEntitiesList()) {
+      System.out.printf("Entity: %s\n", entity.getName());
+      System.out.printf("Salience: %.3f\n", entity.getSalience());
+      System.out.println("Metadata: ");
+      for (Map.Entry<String, String> entry : entity.getMetadataMap().entrySet()) {
+        System.out.printf("%s : %s", entry.getKey(), entry.getValue());
+      }
+      for (EntityMention mention : entity.getMentionsList()) {
+        System.out.printf("Begin offset: %d\n", mention.getText().getBeginOffset());
+        System.out.printf("Content: %s\n", mention.getText().getContent());
+        System.out.printf("Type: %s\n\n", mention.getType());
+      }
+    }
+  }
+}