diff --git a/Tests/Data/TH2M/TH2/heatpipe/heat_pipe_rough.prj b/Tests/Data/TH2M/TH2/heatpipe/heat_pipe_rough.prj
index f1f19ca846b795bfeb0e7a9db917d0b2b14c4d00..922ee05bf7bdd474574c91fa25ff0fd6f274e631 100644
--- a/Tests/Data/TH2M/TH2/heatpipe/heat_pipe_rough.prj
+++ b/Tests/Data/TH2M/TH2/heatpipe/heat_pipe_rough.prj
@@ -612,7 +612,7 @@
             </eigen>
             <petsc>
                 <prefix>sd</prefix>
-                <parameters>-sd_ksp_type cg -sd_pc_type bjacobi -sd_ksp_rtol 1e-16 -sd_ksp_max_it 10000</parameters>
+                <parameters>-sd_ksp_type bcgs -sd_pc_type lu -sd_ksp_rtol 1e-16 -sd_ksp_max_it 10000</parameters>
             </petsc>
         </linear_solver>
     </linear_solvers>