diff --git a/cloud-init.spec b/cloud-init.spec
index 5c85efefc6cbf9e5d91c4ec70dd7e6ed710ae41e..b1597d87780a13315c9ab838cde3431dad78c238 100644
--- a/cloud-init.spec
+++ b/cloud-init.spec
@@ -65,6 +65,7 @@ rm -f $RPM_BUILD_DIR/%{name}-%{version}/tests/unittests/test_datasource/test_ope
 rm -f $RPM_BUILD_DIR/%{name}-%{version}/tests/unittests/test_url_helper.py
 rm -f $RPM_BUILD_DIR/%{name}-%{version}/tests/unittests/sources/test_ec2.py
 
+export PYTHONPATH=%{buildroot}%{python3_sitearch}
 python3 -m pytest tests/unittests/
 
 %pre