diff --git a/python-rasterio.spec b/python-rasterio.spec
index e413238..f401d45 100644
--- a/python-rasterio.spec
+++ b/python-rasterio.spec
@@ -68,8 +68,9 @@ Requires:       python3-snuggs >= 1.4.1
 %check
 rm -r %{srcname}  # Don't try unbuilt copy.
 
+# test_outer_boundless_pixel_fidelity is very flaky, so skip it.
 PYTHONPATH="%{buildroot}%{python3_sitearch}" \
-    pytest-3 -v -m 'not network and not wheel'
+    pytest-3 -v -m 'not network and not wheel' -k 'not test_outer_boundless_pixel_fidelity'
 
 
 %files -n python3-%{srcname}