diff --git a/openfe/tests/protocols/restraints/test_geometry_boresch.py b/openfe/tests/protocols/restraints/test_geometry_boresch.py
index 1990b36d1..f900729b2 100644
--- a/openfe/tests/protocols/restraints/test_geometry_boresch.py
+++ b/openfe/tests/protocols/restraints/test_geometry_boresch.py
@@ -178,6 +178,7 @@ def test_boresch_no_host_anchor(eg5_protein_ligand_universe, eg5_ligands):
         )
 
 
+@pytest.mark.slow
 def test_get_boresch_restraint_single_frame(eg5_protein_ligand_universe, eg5_ligands):
     """
     Make sure we can find a boresh restraint using a single frame
diff --git a/openfe/tests/protocols/restraints/test_geometry_boresch_host.py b/openfe/tests/protocols/restraints/test_geometry_boresch_host.py
index a1528c493..00e14100f 100644
--- a/openfe/tests/protocols/restraints/test_geometry_boresch_host.py
+++ b/openfe/tests/protocols/restraints/test_geometry_boresch_host.py
@@ -142,6 +142,7 @@ def test_evaluate_host2_good(eg5_protein_ligand_universe):
     )
 
 
+@pytest.mark.slow
 def test_find_host_anchor_none(eg5_protein_ligand_universe):
 
     host_anchor = find_host_anchor(