diff --git a/GUI/gui.py b/GUI/gui.py
index f0ba076..f2f0f41 100644
--- a/GUI/gui.py
+++ b/GUI/gui.py
@@ -1,7 +1,4 @@
 from Tkinter import *
-import tkMessageBox
-
-from utils.sourceloader import SourceLoader
 
 class ConfigImporter():
     def __init__(self, filename):
@@ -34,9 +31,10 @@ class ConfigImporter():
             return 'Name, Weight'
 
 class GUI():
-    def __init__(self, search, config_file='GUI/gui.cfg'):
+    def __init__(self, search, config_file='GUI/gui.cfg', sourceloader = None):
         """Boots the window, configuration."""
         self.configurator = ConfigImporter(config_file)
+        self.sourceloader = sourceloader
         self.finish_with_search = False
         self.values = {}
         self.required_variables = ['substance']
@@ -188,8 +186,7 @@ class GUI():
                      'list': False,
                      'search': True}
 
-        source_loader = SourceLoader()
-        self.search(arguments, source_loader)
+        self.search(arguments, self.sourceloader)
 
     def run(self):
         """Starts the window and the search."""
diff --git a/gui_launcher.py b/gui_launcher.py
index 734cb46..bd356bd 100644
--- a/gui_launcher.py
+++ b/gui_launcher.py
@@ -1,5 +1,7 @@
 from fourmi import search
 from GUI import gui
+from utils.sourceloader import SourceLoader
 
-gui_window = gui.GUI(search)
+
+gui_window = gui.GUI(search, sourceloader=SourceLoader())
 gui_window.run()
diff --git a/tests/test_gui.py b/tests/test_gui.py
index 4a9ddd2..247b7a2 100644
--- a/tests/test_gui.py
+++ b/tests/test_gui.py
@@ -6,7 +6,6 @@ class TestGUI(unittest.TestCase):
     def setUp(self):
         pass
 
-
     def test_empty_attributes(self):
         self.test_gui = gui.GUI(None, '../GUI/gui.cfg')
         self.test_gui.window.after(9, self.test_gui.prepare_search)