googleapis
diff --git a/oauth2_http/java/com/google/auth/http/HttpCredentialsAdapter.java b/oauth2_http/java/com/google/auth/http/HttpCredentialsAdapter.java
@@ -69,6 +69,11 @@ public HttpCredentialsAdapter(Credentials credentials) {
     this.credentials = credentials;
   }
 
+  /** A getter for the credentials instance being used */
+  public Credentials getCredentials() {
+    return credentials;
+  }
+
   /**
    * {@inheritDoc}
    *

diff --git a/oauth2_http/javatests/com/google/auth/http/HttpCredentialsAdapterTest.java b/oauth2_http/javatests/com/google/auth/http/HttpCredentialsAdapterTest.java
@@ -31,14 +31,17 @@
 
 package com.google.auth.http;
 
+import static org.hamcrest.CoreMatchers.instanceOf;
 import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertThat;
 
 import com.google.api.client.http.GenericUrl;
 import com.google.api.client.http.HttpHeaders;
 import com.google.api.client.http.HttpRequest;
 import com.google.api.client.http.HttpRequestFactory;
 import com.google.api.client.http.HttpResponse;
 import com.google.api.client.http.HttpTransport;
+import com.google.auth.Credentials;
 import com.google.auth.oauth2.GoogleCredentialsTest.MockTokenServerTransportFactory;
 import com.google.auth.oauth2.MockTokenCheckingTransport;
 import com.google.auth.oauth2.OAuth2Credentials;
@@ -149,4 +152,25 @@ public void initialize_noURI() throws IOException {
     String authorizationHeader = requestHeaders.getAuthorization();
     assertEquals(authorizationHeader, expectedAuthorization);
   }
+
+  @Test
+  public void getCredentials() {
+    final String accessToken = "1/MkSJoj1xsli0AccessToken_NKPY2";
+    MockTokenServerTransportFactory tokenServerTransportFactory =
+        new MockTokenServerTransportFactory();
+    tokenServerTransportFactory.transport.addClient(CLIENT_ID, CLIENT_SECRET);
+    tokenServerTransportFactory.transport.addRefreshToken(REFRESH_TOKEN, accessToken);
+
+    OAuth2Credentials credentials =
+        UserCredentials.newBuilder()
+            .setClientId(CLIENT_ID)
+            .setClientSecret(CLIENT_SECRET)
+            .setRefreshToken(REFRESH_TOKEN)
+            .setHttpTransportFactory(tokenServerTransportFactory)
+            .build();
+
+    HttpCredentialsAdapter adapter = new HttpCredentialsAdapter(credentials);
+    Credentials returnedCredentials = adapter.getCredentials();
+    assertThat(returnedCredentials, instanceOf(Credentials.class));
+  }
 }
diff --git a/oauth2_http/pom.xml b/oauth2_http/pom.xml
@@ -141,5 +141,11 @@
       <artifactId>junit</artifactId>
       <scope>test</scope>
     </dependency>
+    <dependency>
+      <groupId>org.hamcrest</groupId>
+      <artifactId>hamcrest-core</artifactId>
+      <version>1.3</version>
+      <scope>test</scope>
+    </dependency>
   </dependencies>
 </project>