diff --git a/python/lsst/ip/diffim/subtractImages.py b/python/lsst/ip/diffim/subtractImages.py
index 976b3fbf..5df4501a 100644
--- a/python/lsst/ip/diffim/subtractImages.py
+++ b/python/lsst/ip/diffim/subtractImages.py
@@ -582,11 +582,11 @@ def finalize(self, template, science, difference, kernel,
             deltaMaskPlaneTemplate = 2**(diffInjectedTemplateMaskPlane - templateFakeMaskPlane)
 
             # get the arrays from the template and science that are flagged as FAKE
-            injectedScienceMaskArray = (science.mask.array & scienceFakeBitMask) * deltaMaskPlaneScience
-            injectedTemplateMaskArray = (template[bbox].mask.array & templateFakeBitMask) * deltaMaskPlaneTemplate
+            injScienceMaskArray = (science.mask.array & scienceFakeBitMask) * deltaMaskPlaneScience
+            injTemplateMaskArray = (template[bbox].mask.array & templateFakeBitMask) * deltaMaskPlaneTemplate
 
-            mask.array |= injectedScienceMaskArray
-            mask.array |= injectedTemplateMaskArray
+            mask.array |= injScienceMaskArray
+            mask.array |= injTemplateMaskArray
 
         # We have cleared the template mask plane, so copy the mask plane of
         # the image difference so that we can calculate correct statistics
@@ -745,7 +745,6 @@ def _checkMask(mask, sources, badMaskPlanes):
             maskPlane for maskPlane in badMaskPlanes if maskPlane in mask.getMaskPlaneDict().keys()
         ]
 
-        #badPixelMask = lsst.afw.image.Mask.getPlaneBitMask(badMaskPlanes)
         badPixelMask = mask.getPlaneBitMask(setBadMaskPlanes)
 
         xv = np.rint(sources.getX() - mask.getX0())