diff --git a/tests/test_calibrateImage.py b/tests/test_calibrateImage.py
index 6b314d80fb..3e52b5a140 100644
--- a/tests/test_calibrateImage.py
+++ b/tests/test_calibrateImage.py
@@ -77,8 +77,10 @@ def setUp(self):
         schema = dataset.makeMinimalSchema()
         schema.addField("truth_flux", type=np.float64, doc="true flux", units="nJy")
         schema.addField("truth_fluxErr", type=np.float64, doc="true fluxErr", units="nJy")
+        # Add coordinate error fields needed by updateSourceCoords below:
+        afwTable.CoordKey.addErrorFields(schema)
 
-        self.truth_exposure, self.truth_cat = dataset.realize(noise=noise, schema=dataset.makeMinimalSchema())
+        self.truth_exposure, self.truth_cat = dataset.realize(noise=noise, schema=schema)
         lsst.afw.table.updateSourceCoords(self.truth_exposure.wcs, self.truth_cat)
         # To make it look like a version=1 (nJy fluxes) refcat
         self.truth_cat = self.truth_exposure.photoCalib.calibrateCatalog(self.truth_cat)