Use smaller system in test_reset_protocol_work
@@ -390,7 +390,7 @@ class TestExternalPerturbationLangevinIntegrator(TestCase):
nonbonded_method = 'CutoffPeriodic'
# Creating the test system with a high frequency barostat.
- testsystem = testsystems.AlchemicalWaterBox(nonbondedMethod=getattr(app, nonbonded_method))
+ testsystem = testsystems.AlchemicalAlanineDipeptide(nonbondedMethod=getattr(app, nonbonded_method))
testsystem.system.addForce(openmm.MonteCarloBarostat(1 * unit.atmospheres, temperature, 2))
context, integrator = self.create_system(testsystem, parameter_name, parameter_initial, temperature, platform_name)
