diff --git a/lib/spack/spack/test/spec_semantics.py b/lib/spack/spack/test/spec_semantics.py
index 28788aadf62..70bbb7fb078 100644
--- a/lib/spack/spack/test/spec_semantics.py
+++ b/lib/spack/spack/test/spec_semantics.py
@@ -1837,7 +1837,7 @@ def test_abstract_contains_semantic(lhs, rhs, expected, mock_packages):
         (Spec, "mpileaks ^callpath %gcc@5", "mpileaks ^callpath %gcc@5.4", (True, False, True)),
     ],
 )
-def test_intersects_and_satisfies(factory, lhs_str, rhs_str, results):
+def test_intersects_and_satisfies(mock_packages, factory, lhs_str, rhs_str, results):
     lhs = factory(lhs_str)
     rhs = factory(rhs_str)