diff --git a/armi/reactor/tests/test_blocks.py b/armi/reactor/tests/test_blocks.py
index 40cf8e024..3d8fb6be8 100644
--- a/armi/reactor/tests/test_blocks.py
+++ b/armi/reactor/tests/test_blocks.py
@@ -1215,6 +1215,18 @@ def test_getMgFlux(self, mock_sf):
         np.testing.assert_almost_equal(neutronFlux, np.ones(5) * volFrac)
         np.testing.assert_almost_equal(gammaFlux, np.ones(4) * volFrac * 2.0)
 
+        mock_sf.return_value = 1
+        self.block.p.mgFlux = np.array([1, 1, 1, 1, 1])
+        self.block.p.mgFluxGamma = np.array([2, 2, 2, 2])
+        fuel = self.block.getComponent(Flags.FUEL)
+        blockVol = self.block.getVolume()
+        fuelVol = fuel.getVolume()
+        volFrac = fuelVol / blockVol / self.block.getSymmetryFactor()
+        neutronFlux = fuel.getIntegratedMgFlux()
+        gammaFlux = fuel.getIntegratedMgFlux(gamma=True)
+        np.testing.assert_almost_equal(neutronFlux, np.ones(5) * volFrac)
+        np.testing.assert_almost_equal(gammaFlux, np.ones(4) * volFrac * 2.0)
+
     @patch.object(blocks.HexBlock, "getSymmetryFactor")
     def test_completeInitialLoading(self, mock_sf):
         """Ensure that some BOL block and component params are populated properly.