diff --git a/test/integration/sampler_run_test.py b/test/integration/sampler_run_test.py
index 17307e7d7b1897cd5d7580ea74a8029ac755c758..cdf549ccd519737916e97422f00b5de92feaf0ea 100644
--- a/test/integration/sampler_run_test.py
+++ b/test/integration/sampler_run_test.py
@@ -53,7 +53,7 @@ _sampler_kwargs = dict(
         ntemps=1,
         frac_threshold=0.5,
     ),
-    PTMCMCSampler=dict(Niter=101, burn=2, isave=100),
+    PTMCMCSampler=dict(Niter=101, burn=100, covUpdate=100, isave=100),
     pymc=dict(draws=50, tune=50, n_init=250),
     pymultinest=dict(nlive=100),
     pypolychord=dict(nlive=100),