diff --git a/python-textX.spec b/python-textX.spec
index 1e1b4d6..cb2ae0e 100644
--- a/python-textX.spec
+++ b/python-textX.spec
@@ -100,8 +100,8 @@ popd
 %python_expand %fdupes %{buildroot}%{$python_sitelib}/textx
 
 %check
+export PYTHONDONTWRITEBYTECODE=1
 PATH=$PATH:%{buildroot}%{_bindir} %pytest
-find examples/ -name \*.dot | xargs rm # drop indeterministic files (boo#1114571)
 %python_expand rm -r %{buildroot}%{$python_sitelib}/data_dsl*
 %python_expand rm -r %{buildroot}%{$python_sitelib}/flow_codegen*
 %python_expand rm -r %{buildroot}%{$python_sitelib}/flow_dsl*