diff --git a/python-nbclient.spec b/python-nbclient.spec
index 98f30ff..22f5c6c 100644
--- a/python-nbclient.spec
+++ b/python-nbclient.spec
@@ -92,7 +92,7 @@ donttest="parallel_notebooks"
 # https://github.com/jupyter/nbclient/issues/189
 donttest+=" or (test_run_all_notebooks and (opts6 or opts8 or opts9))"
 # extra -v for more verbose error diffs
-%pytest -v -k "not ($donttest)"
+%pytest -v -k "not ($donttest)" --asyncio-mode=auto
 %endif
 
 %if ! %{with test}