Fix #1461: test for bridge sampling (#1473)

* change test_bridge_sampling to laplace

* increase flaky

---------

Co-authored-by: Paul Jonas Jost <70631928+PaulJonasJost@users.noreply.github.com>

test/sample/test_sample.py

@@ -929,7 +929,7 @@ def test_harmonic_mean_log_evidence():
     )
 
 
-@pytest.mark.flaky(reruns=2)
+@pytest.mark.flaky(reruns=3)
 def test_bridge_sampling():
     tol = 2
     # define problem
@@ -965,5 +965,7 @@ def test_bridge_sampling():
 
     # compute the log evidence using harmonic mean
     bridge_log_evidence = sample.evidence.bridge_sampling_log_evidence(result)
-    harmonic_evidence = sample.evidence.harmonic_mean_log_evidence(result)
-    assert np.isclose(bridge_log_evidence, harmonic_evidence, atol=tol)
+    laplace = sample.evidence.laplace_approximation_log_evidence(
+        problem, result.optimize_result.x[0]
+    )
+    assert np.isclose(bridge_log_evidence, laplace, atol=tol)