Modify fixed_binary-test

Author: Clara Witte

Diff for: pyomo/contrib/appsi/solvers/tests/test_persistent_solvers.py

@@ -1210,22 +1210,20 @@ def test_fixed_binaries(
         m.obj = pe.Objective(expr=m.y)
         m.c = pe.Constraint(expr=m.y >= m.x)
         m.x.fix(0)
-        if type(opt) is MAiNGO:
-            opt.maingo_options["epsilonA"] = 1e-6
         res = opt.solve(m)
-        self.assertAlmostEqual(res.best_feasible_objective, 0, 6)
+        self.assertAlmostEqual(res.best_feasible_objective, 0, 5)
         m.x.fix(1)
         res = opt.solve(m)
-        self.assertAlmostEqual(res.best_feasible_objective, 1, 6)
+        self.assertAlmostEqual(res.best_feasible_objective, 1, 5)
 
         opt: PersistentSolver = opt_class(only_child_vars=only_child_vars)
         opt.update_config.treat_fixed_vars_as_params = False
         m.x.fix(0)
         res = opt.solve(m)
-        self.assertAlmostEqual(res.best_feasible_objective, 0, 6)
+        self.assertAlmostEqual(res.best_feasible_objective, 0, 5)
         m.x.fix(1)
         res = opt.solve(m)
-        self.assertAlmostEqual(res.best_feasible_objective, 1, 6)
+        self.assertAlmostEqual(res.best_feasible_objective, 1, 5)
 
     @parameterized.expand(input=_load_tests(mip_solvers, only_child_vars_options))
     def test_with_gdp(