diff --git a/src/main/java/com/uber/cadence/internal/sync/TestActivityEnvironmentInternal.java b/src/main/java/com/uber/cadence/internal/sync/TestActivityEnvironmentInternal.java
index c9c3ef81d..5c6722b7c 100644
--- a/src/main/java/com/uber/cadence/internal/sync/TestActivityEnvironmentInternal.java
+++ b/src/main/java/com/uber/cadence/internal/sync/TestActivityEnvironmentInternal.java
@@ -22,7 +22,6 @@
 import com.uber.cadence.GetTaskListsByDomainRequest;
 import com.uber.cadence.GetTaskListsByDomainResponse;
 import com.uber.cadence.activity.ActivityOptions;
-import com.uber.cadence.activity.LocalActivityOptions;
 import com.uber.cadence.internal.metrics.NoopScope;
 import com.uber.cadence.internal.worker.ActivityTaskHandler;
 import com.uber.cadence.internal.worker.ActivityTaskHandler.Result;
@@ -31,26 +30,19 @@
 import com.uber.cadence.testing.TestActivityEnvironment;
 import com.uber.cadence.testing.TestEnvironmentOptions;
 import com.uber.cadence.workflow.*;
-import com.uber.cadence.workflow.Functions.Func;
-import com.uber.cadence.workflow.Functions.Func1;
 import java.lang.reflect.InvocationHandler;
 import java.lang.reflect.Proxy;
 import java.lang.reflect.Type;
 import java.nio.charset.StandardCharsets;
 import java.time.Duration;
-import java.util.Map;
 import java.util.Objects;
-import java.util.Optional;
-import java.util.Random;
 import java.util.UUID;
 import java.util.concurrent.CancellationException;
 import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.Executors;
 import java.util.concurrent.ScheduledExecutorService;
 import java.util.concurrent.atomic.AtomicInteger;
-import java.util.function.BiPredicate;
 import java.util.function.Consumer;
-import java.util.function.Supplier;
 import org.apache.thrift.TException;
 import org.apache.thrift.async.AsyncMethodCallback;
 
@@ -164,105 +156,6 @@ public <T> Promise<T> executeActivity(
       return Workflow.newPromise(getReply(task, taskResult, resultClass, resultType));
     }
 
-    @Override
-    public <R> Promise<R> executeLocalActivity(
-        String activityName,
-        Class<R> resultClass,
-        Type resultType,
-        Object[] args,
-        LocalActivityOptions options) {
-      throw new UnsupportedOperationException("not implemented");
-    }
-
-    @Override
-    public <R> WorkflowResult<R> executeChildWorkflow(
-        String workflowType,
-        Class<R> resultClass,
-        Type resultType,
-        Object[] args,
-        ChildWorkflowOptions options) {
-      throw new UnsupportedOperationException("not implemented");
-    }
-
-    @Override
-    public Random newRandom() {
-      throw new UnsupportedOperationException("not implemented");
-    }
-
-    @Override
-    public Promise<Void> signalExternalWorkflow(
-        String domain, WorkflowExecution execution, String signalName, Object[] args) {
-      throw new UnsupportedOperationException("not implemented");
-    }
-
-    @Override
-    public Promise<Void> signalExternalWorkflow(
-        WorkflowExecution execution, String signalName, Object[] args) {
-      throw new UnsupportedOperationException("not implemented");
-    }
-
-    @Override
-    public Promise<Void> cancelWorkflow(WorkflowExecution execution) {
-      throw new UnsupportedOperationException("not implemented");
-    }
-
-    @Override
-    public void sleep(Duration duration) {
-      throw new UnsupportedOperationException("not implemented");
-    }
-
-    @Override
-    public boolean await(Duration timeout, String reason, Supplier<Boolean> unblockCondition) {
-      throw new UnsupportedOperationException("not implemented");
-    }
-
-    @Override
-    public void await(String reason, Supplier<Boolean> unblockCondition) {
-      throw new UnsupportedOperationException("not implemented");
-    }
-
-    @Override
-    public Promise<Void> newTimer(Duration duration) {
-      throw new UnsupportedOperationException("not implemented");
-    }
-
-    @Override
-    public <R> R sideEffect(Class<R> resultClass, Type resultType, Func<R> func) {
-      throw new UnsupportedOperationException("not implemented");
-    }
-
-    @Override
-    public <R> R mutableSideEffect(
-        String id, Class<R> resultClass, Type resultType, BiPredicate<R, R> updated, Func<R> func) {
-      throw new UnsupportedOperationException("not implemented");
-    }
-
-    @Override
-    public int getVersion(String changeID, int minSupported, int maxSupported) {
-      throw new UnsupportedOperationException("not implemented");
-    }
-
-    @Override
-    public void continueAsNew(
-        Optional<String> workflowType, Optional<ContinueAsNewOptions> options, Object[] args) {
-      throw new UnsupportedOperationException("not implemented");
-    }
-
-    @Override
-    public void registerQuery(String queryType, Type[] argTypes, Func1<Object[], Object> callback) {
-      throw new UnsupportedOperationException("not implemented");
-    }
-
-    @Override
-    public UUID randomUUID() {
-      throw new UnsupportedOperationException("not implemented");
-    }
-
-    @Override
-    public void upsertSearchAttributes(Map<String, Object> searchAttributes) {
-      throw new UnsupportedOperationException("not implemented");
-    }
-
     private <T> T getReply(
         PollForActivityTaskResponse task,
         ActivityTaskHandler.Result response,