diff --git a/python-argcomplete.spec b/python-argcomplete.spec
index 40867cd..250c859 100644
--- a/python-argcomplete.spec
+++ b/python-argcomplete.spec
@@ -78,6 +78,7 @@ install -p -m0644 %{buildroot}%{python3_sitelib}/%{modname}/bash_completion.d/py
 %if %{with check}
 %check
 export LC_ALL=C.UTF-8
+export PYTHON_DISALLOW_AMBIGUOUS_VERSION=0  # something in tests is invoking /usr/bin/python to test things
 %{__python2} setup.py test
 %{__python3} setup.py test
 %endif