diff --git a/python-pygit2.spec b/python-pygit2.spec
index 6db6105..964d01b 100644
--- a/python-pygit2.spec
+++ b/python-pygit2.spec
@@ -79,11 +79,11 @@ find %{buildroot} -name '*.so' -exec chmod 755 {} ';'
 # https://github.com/libgit2/pygit2/issues/812
 %ifarch aarch64 ppc64 s390x
   %if 0%{?with_python3}
-  pytest-3 || :
+  PYTHONPATH=%{buildroot}%{python3_sitearch} pytest-3 || :
   %endif
 %else
   %if 0%{?with_python3}
-  pytest-3
+  PYTHONPATH=%{buildroot}%{python3_sitearch} pytest-3
   %endif
 %endif