diff --git a/ProcessLib/HT/Tests.cmake b/ProcessLib/HT/Tests.cmake
index 4bd3048963bbb0735181a72f7af9f92885d32024..f4dd5065d900958099cde8b24d3af8cc011fb714 100644
--- a/ProcessLib/HT/Tests.cmake
+++ b/ProcessLib/HT/Tests.cmake
@@ -187,7 +187,7 @@ AddTest(
     REQUIREMENTS NOT (OGS_USE_LIS OR OGS_USE_MPI)
     DIFF_DATA
     square_5500x5500.vtu ConstViscosityThermalConvection_pcs_1_ts_149_t_50000000000.000000.vtu T_ref T 1e-1  1.e-3
-    square_5500x5500.vtu ConstViscosityThermalConvection_pcs_1_ts_149_t_50000000000.000000.vtu p_ref p  1e-1  1.e-3
+    square_5500x5500.vtu ConstViscosityThermalConvection_pcs_1_ts_149_t_50000000000.000000.vtu p_ref p  1e+4  1.e-2
     square_5500x5500.vtu ConstViscosityThermalConvection_pcs_1_ts_149_t_50000000000.000000.vtu darcy_velocity_ref darcy_velocity  1e-1  1.e-3
     VIS ConstViscosityThermalConvection_pcs_1_ts_149_t_50000000000.000000.vtu
 )