diff --git a/libraries/entities-renderer/src/EntityTreeRenderer.cpp b/libraries/entities-renderer/src/EntityTreeRenderer.cpp
index 4a91850fb7..a24461da83 100644
--- a/libraries/entities-renderer/src/EntityTreeRenderer.cpp
+++ b/libraries/entities-renderer/src/EntityTreeRenderer.cpp
@@ -113,10 +113,10 @@ void EntityTreeRenderer::init() {
 
     if (_wantScripts) {
         _entitiesScriptEngine = new ScriptEngine(NO_SCRIPT, "Entities",
-                                        _scriptingServices->getControllerScriptingInterface());
+                                        _scriptingServices->getControllerScriptingInterface(), false);
         _scriptingServices->registerScriptEngineWithApplicationServices(_entitiesScriptEngine);
 
-        _sandboxScriptEngine = new ScriptEngine(NO_SCRIPT, "Entities Sandbox", NULL);
+        _sandboxScriptEngine = new ScriptEngine(NO_SCRIPT, "Entities Sandbox", NULL, false);
     }
 
     // make sure our "last avatar position" is something other than our current position, so that on our
diff --git a/libraries/script-engine/src/ScriptEngine.cpp b/libraries/script-engine/src/ScriptEngine.cpp
index b6c3205fb7..9f061a5cdb 100644
--- a/libraries/script-engine/src/ScriptEngine.cpp
+++ b/libraries/script-engine/src/ScriptEngine.cpp
@@ -81,7 +81,7 @@ void inputControllerFromScriptValue(const QScriptValue &object, AbstractInputCon
 }
 
 ScriptEngine::ScriptEngine(const QString& scriptContents, const QString& fileNameString,
-                           AbstractControllerScriptingInterface* controllerScriptingInterface) :
+            AbstractControllerScriptingInterface* controllerScriptingInterface, bool wantSignals) :
 
     _scriptContents(scriptContents),
     _isFinished(false),
@@ -95,6 +95,7 @@ ScriptEngine::ScriptEngine(const QString& scriptContents, const QString& fileNam
     _avatarSound(NULL),
     _numAvatarSoundSentBytes(0),
     _controllerScriptingInterface(controllerScriptingInterface),
+    _wantSignals(wantSignals),
     _avatarData(NULL),
     _scriptName(),
     _fileNameString(fileNameString),
@@ -299,10 +300,14 @@ void ScriptEngine::loadURL(const QUrl& scriptURL, bool reload) {
                 qCDebug(scriptengine) << "ScriptEngine loading file:" << _fileNameString;
                 QTextStream in(&scriptFile);
                 _scriptContents = in.readAll();
-                emit scriptLoaded(_fileNameString);
+                if (_wantSignals) {
+                    emit scriptLoaded(_fileNameString);
+                }
             } else {
                 qCDebug(scriptengine) << "ERROR Loading file:" << _fileNameString << "line:" << __LINE__;
-                emit errorLoadingScript(_fileNameString);
+                if (_wantSignals) {
+                    emit errorLoadingScript(_fileNameString);
+                }
             }
         } else {
             bool isPending;
@@ -314,12 +319,16 @@ void ScriptEngine::loadURL(const QUrl& scriptURL, bool reload) {
 
 void ScriptEngine::scriptContentsAvailable(const QUrl& url, const QString& scriptContents) {
     _scriptContents = scriptContents;
-    emit scriptLoaded(_fileNameString);
+    if (_wantSignals) {
+        emit scriptLoaded(_fileNameString);
+    }
 }
 
 void ScriptEngine::errorInLoadingScript(const QUrl& url) {
     qCDebug(scriptengine) << "ERROR Loading file:" << url.toString() << "line:" << __LINE__;
-    emit errorLoadingScript(_fileNameString); // ??
+    if (_wantSignals) {
+        emit errorLoadingScript(_fileNameString); // ??
+    }
 }
 
 void ScriptEngine::init() {
@@ -524,7 +533,9 @@ void ScriptEngine::evaluate() {
     if (hasUncaughtException()) {
         int line = uncaughtExceptionLineNumber();
         qCDebug(scriptengine) << "Uncaught exception at (" << _fileNameString << ") line" << line << ":" << result.toString();
-        emit errorMessage("Uncaught exception at (" + _fileNameString + ") line" + QString::number(line) + ":" + result.toString());
+        if (_wantSignals) {
+            emit errorMessage("Uncaught exception at (" + _fileNameString + ") line" + QString::number(line) + ":" + result.toString());
+        }
         clearExceptions();
     }
 }
@@ -541,7 +552,9 @@ QScriptValue ScriptEngine::evaluate(const QString& program, const QString& fileN
         qCDebug(scriptengine) << "Uncaught exception at (" << _fileNameString << " : " << fileName << ") line" << line << ": " << result.toString();
     }
     _evaluatesPending--;
-    emit evaluationFinished(result, hasUncaughtException());
+    if (_wantSignals) {
+        emit evaluationFinished(result, hasUncaughtException());
+    }
     clearExceptions();
     return result;
 }
@@ -567,7 +580,9 @@ void ScriptEngine::run() {
     }
     _isRunning = true;
     _isFinished = false;
-    emit runningStateChanged();
+    if (_wantSignals) {
+        emit runningStateChanged();
+    }
 
     QScriptValue result = evaluate(_scriptContents);
 
@@ -714,19 +729,25 @@ void ScriptEngine::run() {
         if (hasUncaughtException()) {
             int line = uncaughtExceptionLineNumber();
             qCDebug(scriptengine) << "Uncaught exception at (" << _fileNameString << ") line" << line << ":" << uncaughtException().toString();
-            emit errorMessage("Uncaught exception at (" + _fileNameString + ") line" + QString::number(line) + ":" + uncaughtException().toString());
+            if (_wantSignals) {
+                emit errorMessage("Uncaught exception at (" + _fileNameString + ") line" + QString::number(line) + ":" + uncaughtException().toString());
+            }
             clearExceptions();
         }
 
         if (!_isFinished) {
-            emit update(deltaTime);
+            if (_wantSignals) {
+                emit update(deltaTime);
+            }
         }
         lastUpdate = now;
 
     }
 
     stopAllTimers(); // make sure all our timers are stopped if the script is ending
-    emit scriptEnding();
+    if (_wantSignals) {
+        emit scriptEnding();
+    }
 
     // kill the avatar identity timer
     delete _avatarIdentityTimer;
@@ -747,12 +768,15 @@ void ScriptEngine::run() {
         }
     }
 
-    emit finished(_fileNameString);
+    if (_wantSignals) {
+        emit finished(_fileNameString);
+    }
 
     _isRunning = false;
-    emit runningStateChanged();
-
-    emit doneRunning();
+    if (_wantSignals) {
+        emit runningStateChanged();
+        emit doneRunning();
+    }
 
     _doneRunningThisScript = true;
 }
@@ -771,7 +795,9 @@ void ScriptEngine::stopAllTimers() {
 void ScriptEngine::stop() {
     if (!_isFinished) {
         _isFinished = true;
-        emit runningStateChanged();
+        if (_wantSignals) {
+            emit runningStateChanged();
+        }
     }
 }
 
@@ -859,7 +885,9 @@ QUrl ScriptEngine::resolvePath(const QString& include) const {
 }
 
 void ScriptEngine::print(const QString& message) {
-    emit printedMessage(message);
+    if (_wantSignals) {
+        emit printedMessage(message);
+    }
 }
 
 // If a callback is specified, the included files will be loaded asynchronously and the callback will be called
@@ -943,9 +971,13 @@ void ScriptEngine::load(const QString& loadFile) {
     if (_isReloading) {
         auto scriptCache = DependencyManager::get<ScriptCache>();
         scriptCache->deleteScript(url.toString());
-        emit reloadScript(url.toString(), false);
+        if (_wantSignals) {
+            emit reloadScript(url.toString(), false);
+        }
     } else {
-        emit loadScript(url.toString(), false);
+        if (_wantSignals) {
+            emit loadScript(url.toString(), false);
+        }
     }
 }
 
diff --git a/libraries/script-engine/src/ScriptEngine.h b/libraries/script-engine/src/ScriptEngine.h
index c55f13ab47..2bfcecc99e 100644
--- a/libraries/script-engine/src/ScriptEngine.h
+++ b/libraries/script-engine/src/ScriptEngine.h
@@ -45,7 +45,8 @@ class ScriptEngine : public QScriptEngine, public ScriptUser {
 public:
     ScriptEngine(const QString& scriptContents = NO_SCRIPT,
                  const QString& fileNameString = QString(""),
-                 AbstractControllerScriptingInterface* controllerScriptingInterface = NULL);
+                 AbstractControllerScriptingInterface* controllerScriptingInterface = NULL,
+                 bool wantSignals = true);
 
     ~ScriptEngine();
 
@@ -156,6 +157,7 @@ protected:
     int _numAvatarSoundSentBytes;
     bool _isAgent = false;
     QSet<QUrl> _includedURLs;
+    bool _wantSignals = true;
     
 private:
     void stopAllTimers();