diff --git a/tests/.ipynb_checkpoints/test_image-checkpoint.py b/tests/.ipynb_checkpoints/test_image-checkpoint.py
index eddb59a5..67961fcb 100755
--- a/tests/.ipynb_checkpoints/test_image-checkpoint.py
+++ b/tests/.ipynb_checkpoints/test_image-checkpoint.py
@@ -10,32 +10,34 @@
 L5 = ee.ImageCollection('LANDSAT/LT05/C01/T1_SR').first()
 L4 = ee.ImageCollection('LANDSAT/LT04/C01/T1_SR').first()
 
+indices = ['NDVI','BAIS2']
+
 class Test(unittest.TestCase):
     """Tests for `eemont` package."""
     
     def test_S2(self):
         """Test the image module for Sentinel-2"""
-        S2_tested = S2.maskClouds().scale().index()
+        S2_tested = S2.maskClouds().scale().index(indices)
         self.assertIsInstance(S2_tested, ee.image.Image)
         
     def test_L8(self):
         """Test the image module for Landsat 8"""
-        L8_tested = L8.maskClouds().scale().index()
+        L8_tested = L8.maskClouds().scale().index(indices)
         self.assertIsInstance(L8_tested, ee.image.Image)
         
     def test_L7(self):
         """Test the image module for Landsat 7"""
-        L7_tested = L7.maskClouds().scale().index()
+        L7_tested = L7.maskClouds().scale().index(indices)
         self.assertIsInstance(L7_tested, ee.image.Image)
         
     def test_L5(self):
         """Test the image module for Landsat 5"""
-        L5_tested = L5.maskClouds().scale().index()
+        L5_tested = L5.maskClouds().scale().index(indices)
         self.assertIsInstance(L5_tested, ee.image.Image)
         
     def test_L4(self):
         """Test the image module for Landsat 4"""
-        L4_tested = L4.maskClouds().scale().index()
+        L4_tested = L4.maskClouds().scale().index(indices)
         self.assertIsInstance(L4_tested, ee.image.Image)
         
 if __name__ == '__main__':
diff --git a/tests/test_image.py b/tests/test_image.py
index eddb59a5..67961fcb 100755
--- a/tests/test_image.py
+++ b/tests/test_image.py
@@ -10,32 +10,34 @@
 L5 = ee.ImageCollection('LANDSAT/LT05/C01/T1_SR').first()
 L4 = ee.ImageCollection('LANDSAT/LT04/C01/T1_SR').first()
 
+indices = ['NDVI','BAIS2']
+
 class Test(unittest.TestCase):
     """Tests for `eemont` package."""
     
     def test_S2(self):
         """Test the image module for Sentinel-2"""
-        S2_tested = S2.maskClouds().scale().index()
+        S2_tested = S2.maskClouds().scale().index(indices)
         self.assertIsInstance(S2_tested, ee.image.Image)
         
     def test_L8(self):
         """Test the image module for Landsat 8"""
-        L8_tested = L8.maskClouds().scale().index()
+        L8_tested = L8.maskClouds().scale().index(indices)
         self.assertIsInstance(L8_tested, ee.image.Image)
         
     def test_L7(self):
         """Test the image module for Landsat 7"""
-        L7_tested = L7.maskClouds().scale().index()
+        L7_tested = L7.maskClouds().scale().index(indices)
         self.assertIsInstance(L7_tested, ee.image.Image)
         
     def test_L5(self):
         """Test the image module for Landsat 5"""
-        L5_tested = L5.maskClouds().scale().index()
+        L5_tested = L5.maskClouds().scale().index(indices)
         self.assertIsInstance(L5_tested, ee.image.Image)
         
     def test_L4(self):
         """Test the image module for Landsat 4"""
-        L4_tested = L4.maskClouds().scale().index()
+        L4_tested = L4.maskClouds().scale().index(indices)
         self.assertIsInstance(L4_tested, ee.image.Image)
         
 if __name__ == '__main__':
diff --git a/tests/test_imagecollection.py b/tests/test_imagecollection.py
index d2267169..341f5ccd 100755
--- a/tests/test_imagecollection.py
+++ b/tests/test_imagecollection.py
@@ -12,32 +12,34 @@
 L5 = ee.ImageCollection('LANDSAT/LT05/C01/T1_SR').filterBounds(point)
 L4 = ee.ImageCollection('LANDSAT/LT04/C01/T1_SR').filterBounds(point)
 
+indices = ['NDVI','BAIS2']
+
 class Test(unittest.TestCase):
     """Tests for `eemont` package."""
     
     def test_S2(self):
-        """Test the image module for Sentinel-2"""
-        S2_tested = S2.closest('2020-01-15').maskClouds().scale().index()
+        """Test the image collection module for Sentinel-2"""
+        S2_tested = S2.closest('2020-01-15').maskClouds().scale().index(indices)
         self.assertIsInstance(S2_tested, ee.imagecollection.ImageCollection)
         
     def test_L8(self):
-        """Test the image module for Landsat 8"""
-        L8_tested = L8.closest('2020-01-15').maskClouds().scale().index()
+        """Test the image collection module for Landsat 8"""
+        L8_tested = L8.closest('2020-01-15').maskClouds().scale().index(indices)
         self.assertIsInstance(L8_tested, ee.imagecollection.ImageCollection)
         
     def test_L7(self):
-        """Test the image module for Landsat 7"""
-        L7_tested = L7.closest('2010-01-15').maskClouds().scale().index()
+        """Test the image collection module for Landsat 7"""
+        L7_tested = L7.closest('2010-01-15').maskClouds().scale().index(indices)
         self.assertIsInstance(L7_tested, ee.imagecollection.ImageCollection)
         
     def test_L5(self):
-        """Test the image module for Landsat 5"""
-        L5_tested = L5.closest('2000-01-15').maskClouds().scale().index()
+        """Test the image collection module for Landsat 5"""
+        L5_tested = L5.closest('2000-01-15').maskClouds().scale().index(indices)
         self.assertIsInstance(L5_tested, ee.imagecollection.ImageCollection)
         
     def test_L4(self):
-        """Test the image module for Landsat 4"""
-        L4_tested = L4.closest('1990-01-15').maskClouds().scale().index()
+        """Test the image collection module for Landsat 4"""
+        L4_tested = L4.closest('1990-01-15').maskClouds().scale().index(indices)
         self.assertIsInstance(L4_tested, ee.imagecollection.ImageCollection)
         
 if __name__ == '__main__':