diff --git a/src/CoaddPsf.cc b/src/CoaddPsf.cc
index 38f3c41ce..b4b332163 100644
--- a/src/CoaddPsf.cc
+++ b/src/CoaddPsf.cc
@@ -36,6 +36,7 @@
 #include "lsst/base.h"
 #include "lsst/pex/exceptions.h"
 #include "lsst/geom/Box.h"
+#include "lsst/afw/detection/Psf.h"
 #include "lsst/afw/image/ImageUtils.h"
 #include "lsst/afw/math/Statistics.h"
 #include "lsst/meas/algorithms/CoaddPsf.h"
@@ -229,7 +230,7 @@ geom::Box2I CoaddPsf::doComputeBBox(geom::Point2D const &ccdXY, afw::image::Colo
     afw::table::ExposureCatalog subcat = _catalog.subsetContaining(ccdXY, _coaddWcs, true);
     if (subcat.empty()) {
         throw LSST_EXCEPT(
-                pex::exceptions::InvalidParameterError,
+                lsst::afw::detection::InvalidPsfError,
                 (boost::format("Cannot compute BBox at point %s; no input images at that point.") % ccdXY)
                         .str());
     }
@@ -252,7 +253,7 @@ CoaddPsf::doComputeKernelImage(geom::Point2D const &ccdXY, afw::image::Color con
     afw::table::ExposureCatalog subcat = _catalog.subsetContaining(ccdXY, _coaddWcs, true);
     if (subcat.empty()) {
         throw LSST_EXCEPT(
-                pex::exceptions::InvalidParameterError,
+                lsst::afw::detection::InvalidPsfError,
                 (boost::format("Cannot compute CoaddPsf at point %s; no input images at that point.") % ccdXY)
                         .str());
     }
diff --git a/tests/test_coaddPsf.py b/tests/test_coaddPsf.py
index d7d2d64d8..0e7cc84c5 100755
--- a/tests/test_coaddPsf.py
+++ b/tests/test_coaddPsf.py
@@ -29,10 +29,10 @@
 import lsst.meas.algorithms as measAlg
 import lsst.pex.exceptions as pexExceptions
 import lsst.utils.tests
+from lsst.afw.detection import InvalidPsfError
 
 
 def getPsfMoments(psf, point):
-    #    import os, pdb; print "PID =", os.getpid(); pdb.set_trace()
     image = psf.computeImage(point)
     array = image.getArray()
     sumx2 = 0.0
@@ -127,7 +127,6 @@ def tearDown(self):
 
     def testCreate(self):
         """Check that we can create a CoaddPsf with 9 elements."""
-        print("CreatePsfTest")
 
         # also test that the weight field name is correctly observed
         schema = afwTable.ExposureTable.makeMinimalSchema()
@@ -174,7 +173,6 @@ def testCreate(self):
 
     def testFractionalPixel(self):
         """Check that we can create a CoaddPsf with 10 elements."""
-        print("FractionalPixelTest")
         cdMatrix = afwGeom.makeCdMatrix(
             scale=5.55555555e-05*lsst.geom.degrees,
             orientation=90*lsst.geom.degrees,
@@ -202,7 +200,6 @@ def testFractionalPixel(self):
 
     def testRotatePsf(self):
         """Check that we can create a CoaddPsf with 10 elements."""
-        print("RotatePsfTest")
         cdMatrix = afwGeom.makeCdMatrix(
             scale=5.55555555e-05*lsst.geom.degrees,
             orientation=90*lsst.geom.degrees,
@@ -228,7 +225,6 @@ def testRotatePsf(self):
 
     def testDefaultSize(self):
         """Test of both default size and specified size."""
-        print("DefaultSizeTest")
         sigma0 = 5
         # set the peak of the outer guassian to 0 so this is really a single gaussian.
 
@@ -255,7 +251,6 @@ def testDefaultSize(self):
 
     def testSimpleGaussian(self):
         """Check that we can measure a single Gaussian's attributes."""
-        print("SimpleGaussianTest")
         sigma0 = 5
         # set the peak of the outer guassian to 0 so this is really a single gaussian.
 
@@ -296,7 +291,6 @@ def testSimpleGaussian(self):
 
     def testWeight(self):
         """Check that we can measure a single Gaussian's attributes."""
-        print("WeightTest")
         sigma0 = 5
         # set the peak of the outer guassian to 0 so this is really a single gaussian.
 
@@ -365,6 +359,13 @@ def testTicket2872(self):
         naiveAvgPos = lsst.geom.Point2D(50, 50)
         with self.assertRaises(pexExceptions.InvalidParameterError):
             coaddPsf.computeKernelImage(naiveAvgPos)
+        with self.assertRaises(InvalidPsfError):
+            coaddPsf.computeKernelImage(naiveAvgPos)
+        with self.assertRaises(pexExceptions.InvalidParameterError):
+            coaddPsf.computeBBox(naiveAvgPos)
+        with self.assertRaises(InvalidPsfError):
+            coaddPsf.computeBBox(naiveAvgPos)
+
         # important test is that this doesn't throw:
         coaddPsf.computeKernelImage(coaddPsf.getAveragePosition())