diff --git a/oauth2_http/javatests/com/google/auth/oauth2/GoogleCredentialsTest.java b/oauth2_http/javatests/com/google/auth/oauth2/GoogleCredentialsTest.java
index 2fe4ef05c..6af5bd9d6 100644
--- a/oauth2_http/javatests/com/google/auth/oauth2/GoogleCredentialsTest.java
+++ b/oauth2_http/javatests/com/google/auth/oauth2/GoogleCredentialsTest.java
@@ -34,14 +34,10 @@
 import static org.junit.Assert.*;
 
 import com.google.api.client.json.GenericJson;
-import com.google.api.client.util.Clock;
 import com.google.auth.Credentials;
 import com.google.auth.TestUtils;
 import com.google.auth.http.HttpTransportFactory;
-import com.google.auth.oauth2.ExternalAccountAuthorizedUserCredentialsTest.MockExternalAccountAuthorizedUserCredentialsTransportFactory;
 import com.google.auth.oauth2.IdentityPoolCredentialsTest.MockExternalAccountCredentialsTransportFactory;
-import com.google.auth.oauth2.ImpersonatedCredentialsTest.MockIAMCredentialsServiceTransportFactory;
-import com.google.common.collect.ImmutableList;
 import java.io.ByteArrayInputStream;
 import java.io.IOException;
 import java.io.InputStream;
@@ -51,7 +47,6 @@
 import java.util.Collections;
 import java.util.List;
 import java.util.Map;
-import java.util.concurrent.atomic.AtomicReference;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.junit.runners.JUnit4;