diff --git a/src/main/java/com/faendir/rhino_android/AndroidContextFactory.java b/src/main/java/com/faendir/rhino_android/AndroidContextFactory.java
index dcc385a..348db6a 100644
--- a/src/main/java/com/faendir/rhino_android/AndroidContextFactory.java
+++ b/src/main/java/com/faendir/rhino_android/AndroidContextFactory.java
@@ -29,7 +29,6 @@
  * @author F43nd1r
  * @since 11.01.2016
  */
-@VisibleForTesting
 public class AndroidContextFactory extends ContextFactory {
 
     private final File cacheDirectory;
@@ -50,9 +49,8 @@ public AndroidContextFactory(File cacheDirectory) {
      * @param parent the parent of the create classloader
      * @return a new ClassLoader
      */
-    @VisibleForTesting
     @Override
-    public BaseAndroidClassLoader createClassLoader(ClassLoader parent) {
+    protected BaseAndroidClassLoader createClassLoader(ClassLoader parent) {
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
             return new InMemoryAndroidClassLoader(parent);
         }
diff --git a/src/main/java/com/faendir/rhino_android/RhinoAndroidHelper.java b/src/main/java/com/faendir/rhino_android/RhinoAndroidHelper.java
index 26722e9..235095d 100644
--- a/src/main/java/com/faendir/rhino_android/RhinoAndroidHelper.java
+++ b/src/main/java/com/faendir/rhino_android/RhinoAndroidHelper.java
@@ -16,7 +16,6 @@
 
 package com.faendir.rhino_android;
 
-import androidx.annotation.VisibleForTesting;
 import org.mozilla.javascript.Context;
 import org.mozilla.javascript.ContextFactory;
 import org.mozilla.javascript.SecurityController;
@@ -35,8 +34,10 @@ public class RhinoAndroidHelper {
 
     /**
      * Constructs a new helper using the default temporary directory.
-     * Note: It is recommended to use a custom directory, so no permission problems occur.
+     *
+     * @deprecated permission issues may occur.
      */
+    @Deprecated
     public RhinoAndroidHelper() {
         this(new File(System.getProperty("java.io.tmpdir", "."), "classes"));
     }
@@ -59,6 +60,15 @@ public RhinoAndroidHelper(File cacheDirectory) {
         this.cacheDirectory = cacheDirectory;
     }
 
+    /**
+     * @return a context prepared for android
+     * @deprecated use {@link #enterContext()} instead
+     */
+    @Deprecated
+    public static Context prepareContext() {
+        return new RhinoAndroidHelper().enterContext();
+    }
+
     /**
      * call this instead of {@link Context#enter()}
      *
@@ -73,26 +83,25 @@ public Context enterContext() {
     /**
      * @return The Context factory which has to be used on android.
      */
-    @VisibleForTesting
     public AndroidContextFactory getContextFactory() {
         AndroidContextFactory factory;
         if (!ContextFactory.hasExplicitGlobal()) {
-            factory = new AndroidContextFactory(cacheDirectory);
+            factory = createAndroidContextFactory(cacheDirectory);
             ContextFactory.getGlobalSetter().setContextFactoryGlobal(factory);
         } else if (!(ContextFactory.getGlobal() instanceof AndroidContextFactory)) {
             throw new IllegalStateException("Cannot initialize factory for Android Rhino: There is already another factory");
         } else {
-            factory = (AndroidContextFactory) ContextFactory.getGlobal();
+            factory = (AndroidContextFactory)ContextFactory.getGlobal();
         }
         return factory;
     }
 
     /**
-     * @return a context prepared for android
-     * @deprecated use {@link #enterContext()} instead
+     * Override this to modify the context factory.
+     *
+     * @return a new {@link AndroidContextFactory}
      */
-    @Deprecated
-    public static Context prepareContext() {
-        return new RhinoAndroidHelper().enterContext();
+    protected AndroidContextFactory createAndroidContextFactory(File cacheDirectory) {
+        return new AndroidContextFactory(cacheDirectory);
     }
 }