diff --git a/presto/dataops/utils.py b/presto/dataops/utils.py
index ce5991f..3c3aa6e 100644
--- a/presto/dataops/utils.py
+++ b/presto/dataops/utils.py
@@ -6,6 +6,7 @@
 from .pipelines.s1_s2_era5_srtm import (
     BANDS,
     ERA5_BANDS,
+    NORMED_BANDS,
     REMOVED_BANDS,
     S1_BANDS,
     S1_S2_ERA5_SRTM,
@@ -60,8 +61,15 @@ def construct_single_presto_input(
     if dynamic_world is None:
         dynamic_world = torch.ones(num_timesteps) * (DynamicWorld2020_2021.class_amount)
 
+    keep_indices = [idx for idx, val in enumerate(BANDS) if val != "B9"]
+    mask = mask[:, keep_indices]
+
     if normalize:
-        keep_indices = [idx for idx, val in enumerate(BANDS) if val != "B9"]
-        mask = mask[:, keep_indices]
+        # normalize includes x = x[:, keep_indices]
         x = S1_S2_ERA5_SRTM.normalize(x)
+        if s2_bands is not None:
+            if ("B8" in s2_bands) and ("B4" in s2_bands):
+                mask[:, NORMED_BANDS.index("NDVI")] = 0
+    else:
+        x = x[:, keep_indices]
     return x, mask, dynamic_world
diff --git a/tests/test_dataops_utils.py b/tests/test_dataops_utils.py
index 3a06ae9..2975fdc 100644
--- a/tests/test_dataops_utils.py
+++ b/tests/test_dataops_utils.py
@@ -4,15 +4,39 @@
 
 from presto import construct_single_presto_input
 from presto.dataops.pipelines.dynamicworld import DynamicWorld2020_2021
+from presto.dataops.pipelines.s1_s2_era5_srtm import NORMED_BANDS
 
 
 class TestDatopsUtils(TestCase):
     def test_construct_single_presto_input(self):
+        input_bands = ["B2", "B3", "B4", "B8"]
         x, mask, dw = construct_single_presto_input(
-            s2=torch.ones(2, 3), s2_bands=["B2", "B3", "B4"], normalize=False
+            s2=torch.ones(2, 4), s2_bands=input_bands, normalize=False
         )
         self.assertTrue(torch.equal(dw, torch.ones_like(dw) * DynamicWorld2020_2021.class_amount))
         self.assertEqual(len(dw), x.shape[0])
         self.assertEqual(x.shape, mask.shape)
         self.assertTrue((x[mask == 1] == 0).all())
         self.assertTrue((x[mask == 0] != 0).all())
+        for idx, band in enumerate(NORMED_BANDS):
+            if band in input_bands:
+                self.assertTrue((mask[:, idx] == 0).all())
+            else:
+                self.assertTrue((mask[:, idx] == 1).all())
+
+    def test_construct_single_presto_input_ndvi(self):
+        input_bands = ["B2", "B3", "B4", "B8"]
+        x, mask, dw = construct_single_presto_input(
+            s2=torch.tensor([[1, 2, 3, 4], [1, 2, 3, 4]]).float(),
+            s2_bands=input_bands,
+            normalize=True,
+        )
+        self.assertTrue(torch.equal(dw, torch.ones_like(dw) * DynamicWorld2020_2021.class_amount))
+        self.assertEqual(len(dw), x.shape[0])
+        self.assertEqual(x.shape, mask.shape)
+        # we can't test for equality to 0 since we normalize;
+        # that's tested above
+        self.assertTrue((x[mask == 0] != 0).all())
+        for idx, band in enumerate(NORMED_BANDS):
+            if band in input_bands + ["NDVI"]:
+                self.assertTrue((mask[:, idx] == 0).all())