diff --git a/src/tests/mock/bitmessagemock.py b/src/tests/mock/bitmessagemock.py
index 71055c62..24491a5a 100644
--- a/src/tests/mock/bitmessagemock.py
+++ b/src/tests/mock/bitmessagemock.py
@@ -1,3 +1,36 @@
+from class_addressGenerator import FakeAddressGenerator
+from class_singleWorker import MockSingleWorker
+from class_objectProcessor import MockObjectProcessor
+from inventory import MockInventory
+
+
 def main():
     """Mock main function"""
-    pass
+    def start(self):
+        """Start main application"""
+        # pylint: disable=too-many-statements,too-many-branches,too-many-locals
+
+        config = BMConfigParser()
+        daemon = config.safeGetBoolean('bitmessagesettings', 'daemon')
+
+        # Start the address generation thread
+        addressGeneratorThread = addressGenerator()
+        # close the main program even if there are threads left
+        addressGeneratorThread.daemon = True
+        addressGeneratorThread.start()
+
+        # Start the thread that calculates POWs
+        singleWorkerThread = MockSingleWorker()
+        # close the main program even if there are threads left
+        singleWorkerThread.daemon = True
+        singleWorkerThread.start()
+
+        # Start the thread that calculates POWs
+        objectProcessorThread = MockObjectProcessor()
+        # DON'T close the main program even the thread remains.
+        # This thread checks the shutdown variable after processing
+        # each object.
+        objectProcessorThread.daemon = False
+        objectProcessorThread.start()
+
+        MockInventory()  # init
diff --git a/src/tests/mock/class_objectProcessor.py b/src/tests/mock/class_objectProcessor.py
index 09120fc6..c418abc6 100644
--- a/src/tests/mock/class_objectProcessor.py
+++ b/src/tests/mock/class_objectProcessor.py
@@ -15,7 +15,7 @@ from network import bmproto
 logger = logging.getLogger('default')
 
 
-class objectProcessor(threading.Thread):
+class MockObjectProcessor(threading.Thread):
     """
     The objectProcessor thread, of which there is only one, receives network
     objects (msg, broadcast, pubkey, getpubkey) from the receiveDataThreads.