diff --git a/tests/test-check-py3-compat.t b/tests/test-check-py3-compat.t
--- a/tests/test-check-py3-compat.t
+++ b/tests/test-check-py3-compat.t
@@ -26,17 +26,23 @@
   $ testrepohg files 'set:(**.py) - grep(pygments)' \
   > -X hgdemandimport/demandimportpy2.py \
   > -X hgext/fsmonitor/pywatchman \
+  > -X mercurial/thirdparty/cbor \
   > | sed 's|\\|/|g' | xargs $PYTHON3 contrib/check-py3-compat.py \
   > | sed 's/[0-9][0-9]*)$/*)/'
-  hgext/convert/transport.py: error importing: <*Error> No module named 'svn.client' (error at transport.py:*) (glob)
-  mercurial/cffi/bdiff.py: error importing: <ImportError> cannot import name '_bdiff' (error at bdiff.py:*)
-  mercurial/cffi/bdiffbuild.py: error importing: <ImportError> No module named 'cffi' (error at bdiffbuild.py:*)
-  mercurial/cffi/mpatch.py: error importing: <ImportError> cannot import name '_mpatch' (error at mpatch.py:*)
-  mercurial/cffi/mpatchbuild.py: error importing: <ImportError> No module named 'cffi' (error at mpatchbuild.py:*)
-  mercurial/cffi/osutilbuild.py: error importing: <ImportError> No module named 'cffi' (error at osutilbuild.py:*)
-  mercurial/scmwindows.py: error importing: <*Error> No module named 'msvcrt' (error at win32.py:*) (glob)
-  mercurial/win32.py: error importing: <*Error> No module named 'msvcrt' (error at win32.py:*) (glob)
-  mercurial/windows.py: error importing: <*Error> No module named 'msvcrt' (error at windows.py:*) (glob)
+  contrib/python-zstandard/setup.py not using absolute_import
+  contrib/python-zstandard/setup_zstd.py not using absolute_import
+  contrib/python-zstandard/tests/common.py not using absolute_import
+  contrib/python-zstandard/tests/test_buffer_util.py not using absolute_import
+  contrib/python-zstandard/tests/test_compressor.py not using absolute_import
+  contrib/python-zstandard/tests/test_compressor_fuzzing.py not using absolute_import
+  contrib/python-zstandard/tests/test_data_structures.py not using absolute_import
+  contrib/python-zstandard/tests/test_data_structures_fuzzing.py not using absolute_import
+  contrib/python-zstandard/tests/test_decompressor.py not using absolute_import
+  contrib/python-zstandard/tests/test_decompressor_fuzzing.py not using absolute_import
+  contrib/python-zstandard/tests/test_estimate_sizes.py not using absolute_import
+  contrib/python-zstandard/tests/test_module_attributes.py not using absolute_import
+  contrib/python-zstandard/tests/test_train_dictionary.py not using absolute_import
+  setup.py not using absolute_import
 
 #endif