diff --git a/ProcessLib/HT/Tests.cmake b/ProcessLib/HT/Tests.cmake
index c7fb657352ef1aeaf8164b08c075b2022dbc20d8..be174ae51de1c601f952c1099f5c80879ce00a98 100644
--- a/ProcessLib/HT/Tests.cmake
+++ b/ProcessLib/HT/Tests.cmake
@@ -357,18 +357,6 @@ AddTest(
CoupledPressureParabolicTemperatureParabolic_ts_10_expected.vtu CoupledPressureParabolicTemperatureParabolicStaggered_pcs_1_ts_10_t_1.000000.vtu darcy_velocity darcy_velocity 1e-10 1e-10
)
-AddTest(
- NAME HT_SimpleSynthetics_constraint_dirichlet_bc
- PATH Parabolic/HT/SimpleSynthetics
- EXECUTABLE ogs
- EXECUTABLE_ARGS constraint_bc_1e3.prj
- TESTER vtkdiff
- REQUIREMENTS NOT OGS_USE_MPI
- DIFF_DATA
- GLOB constraint_bc_1e3_pcs_0_ts_*.vtu T T 1e-14 1e-13
- GLOB constraint_bc_1e3_pcs_0_ts_*.vtu p p 1e-15 1e-14
-)
-
# MPI/PETSc tests
AddTest(
NAME Parallel_LARGE_2D_ThermalConvection_constviscosity
diff --git a/Tests/Data/Parabolic/HT/SimpleSynthetics/constraint_bc_1e3.prj b/Tests/Data/Parabolic/HT/SimpleSynthetics/constraint_bc_1e3.prj
deleted file mode 100644
index cdffda125ca02b3812fe055b1ebb946fbcc2b49a..0000000000000000000000000000000000000000
--- a/Tests/Data/Parabolic/HT/SimpleSynthetics/constraint_bc_1e3.prj
+++ /dev/null
@@ -1,431 +0,0 @@
-<?xml version="1.0" encoding="ISO-8859-1"?>
-<OpenGeoSysProject>
- <mesh>cube_1x1x1_hex_1e3.vtu</mesh>
- <geometry>cube_1x1x1.gml</geometry>
- <processes>
- <process>
- <name>SimpleThermalConvection</name>
- <type>HT</type>
- <integration_order>2</integration_order>
- <process_variables>
- <temperature>T</temperature>
- <pressure>p</pressure>
- </process_variables>
- <specific_body_force>0 0 0</specific_body_force>
- <secondary_variables>
- <secondary_variable internal_name="darcy_velocity" output_name="darcy_velocity"/>
- </secondary_variables>
- </process>
- </processes>
- <media>
- <medium id="0">
- <phases>
- <phase>
- <type>AqueousLiquid</type>
- <properties>
- <property>
- <name>density</name>
- <type>Linear</type>
- <reference_value>1000</reference_value>
- <independent_variable>
- <variable_name>temperature</variable_name>
- <reference_condition>20</reference_condition>
- <slope>-4.3e-4</slope>
- </independent_variable>
- </property>
- <property>
- <name>viscosity</name>
- <type>Constant</type>
- <value>1.0e-3</value>
- </property>
- <property>
- <name>specific_heat_capacity</name>
- <type>Constant</type>
- <value>4200</value>
- </property>
- <property>
- <name>thermal_conductivity</name>
- <type>Constant</type>
- <value>0.65</value>
- </property>
- </properties>
- </phase>
- <phase>
- <type>Solid</type>
- <properties>
- <property>
- <name>storage</name>
- <type>Constant</type>
- <value>0.0</value>
- </property>
- <property>
- <name>density</name>
- <type>Constant</type>
- <value>0.0</value>
- </property>
- <property>
- <name>thermal_conductivity</name>
- <type>Constant</type>
- <value>3.0</value>
- </property>
- <property>
- <name>specific_heat_capacity</name>
- <type>Constant</type>
- <value>0</value>
- </property>
- </properties>
- </phase>
- </phases>
- <properties>
- <property>
- <name>thermal_longitudinal_dispersivity</name>
- <type>Constant</type>
- <value>0.0</value>
- </property>
- <property>
- <name>thermal_transversal_dispersivity</name>
- <type>Constant</type>
- <value>0.0</value>
- </property>
- <property>
- <name>permeability</name>
- <type>Constant</type>
- <value>1.e-14 0 0 0 1.e-14 0 0 0 1.e-14</value>
- </property>
- <property>
- <name>porosity</name>
- <type>Constant</type>
- <value>0.001</value>
- </property>
- </properties>
- </medium>
- </media>
- <time_loop>
- <processes>
- <process ref="SimpleThermalConvection">
- <nonlinear_solver>basic_picard</nonlinear_solver>
- <convergence_criterion>
- <type>DeltaX</type>
- <norm_type>NORM2</norm_type>
- <abstol>1.e-3</abstol>
- </convergence_criterion>
- <time_discretization>
- <type>BackwardEuler</type>
- </time_discretization>
- <time_stepping>
- <type>FixedTimeStepping</type>
- <t_initial> 0.0 </t_initial>
- <t_end> 10 </t_end>
- <timesteps>
- <pair>
- <repeat>1</repeat>
- <delta_t>1e-7</delta_t>
- </pair>
- <pair>
- <repeat>1</repeat>
- <delta_t>1e-5</delta_t>
- </pair>
- <pair>
- <repeat>1</repeat>
- <delta_t>1e-3</delta_t>
- </pair>
- <pair>
- <repeat>1</repeat>
- <delta_t>1e-1</delta_t>
- </pair>
- <pair>
- <repeat>1</repeat>
- <delta_t>1</delta_t>
- </pair>
- <pair>
- <repeat>1</repeat>
- <delta_t>10</delta_t>
- </pair>
- </timesteps>
- </time_stepping>
- </process>
- </processes>
- <output>
- <type>VTK</type>
- <prefix>constraint_bc_1e3</prefix>
- <timesteps>
- <pair>
- <repeat> 10 </repeat>
- <each_steps> 1 </each_steps>
- </pair>
- </timesteps>
- <variables>
- <variable>T</variable>
- <variable>p</variable>
- <variable>darcy_velocity</variable>
- </variables>
- </output>
- </time_loop>
- <parameters>
- <parameter>
- <name>rho_fluid</name>
- <type>Constant</type>
- <value>1000</value>
- </parameter>
- <parameter>
- <name>lambda_fluid</name>
- <type>Constant</type>
- <value>0.65</value>
- </parameter>
- <parameter>
- <name>alpha_l</name>
- <type>Constant</type>
- <value>0.0</value>
- </parameter>
- <parameter>
- <name>alpha_t</name>
- <type>Constant</type>
- <value>0.0</value>
- </parameter>
- <parameter>
- <name>T0</name>
- <type>Constant</type>
- <value>20</value>
- </parameter>
- <parameter>
- <name>P0</name>
- <type>Constant</type>
- <value>2.99e7</value>
- </parameter>
- <parameter>
- <name>p_Dirichlet_left0</name>
- <type>Constant</type>
- <value>3e7</value>
- </parameter>
- <parameter>
- <name>p_Dirichlet_left1</name>
- <type>Constant</type>
- <value>2.999e7</value>
- </parameter>
- <parameter>
- <name>p_Dirichlet_left2</name>
- <type>Constant</type>
- <value>2.998e7</value>
- </parameter>
- <parameter>
- <name>p_Dirichlet_left3</name>
- <type>Constant</type>
- <value>2.997e7</value>
- </parameter>
- <parameter>
- <name>p_Dirichlet_left4</name>
- <type>Constant</type>
- <value>2.996e7</value>
- </parameter>
- <parameter>
- <name>p_Dirichlet_left5</name>
- <type>Constant</type>
- <value>2.995e7</value>
- </parameter>
- <parameter>
- <name>p_Dirichlet_left6</name>
- <type>Constant</type>
- <value>2.994e7</value>
- </parameter>
- <parameter>
- <name>p_Dirichlet_left7</name>
- <type>Constant</type>
- <value>2.993e7</value>
- </parameter>
- <parameter>
- <name>p_Dirichlet_left8</name>
- <type>Constant</type>
- <value>2.992e7</value>
- </parameter>
- <parameter>
- <name>p_Dirichlet_left9</name>
- <type>Constant</type>
- <value>2.991e7</value>
- </parameter>
- <parameter>
- <name>p_Dirichlet_right</name>
- <type>Constant</type>
- <value>2.99e7</value>
- </parameter>
- <parameter>
- <name>t_Dirichlet_left</name>
- <type>Constant</type>
- <value>20</value>
- </parameter>
- <parameter>
- <name>t_Dirichlet_right</name>
- <type>Constant</type>
- <value>10</value>
- </parameter>
- <parameter>
- <name>constant_porosity_parameter</name>
- <type>Constant</type>
- <value>0.001</value>
- </parameter>
- <parameter>
- <name>kappa1</name>
- <type>Constant</type>
- <values>1.e-14 0 0 0 1.e-14 0 0 0 1.e-14</values>
- </parameter>
- </parameters>
- <process_variables>
- <process_variable>
- <name>T</name>
- <components>1</components>
- <order>1</order>
- <initial_condition>T0</initial_condition>
- <boundary_conditions>
- <boundary_condition>
- <geometrical_set>cube_1x1x1_geometry</geometrical_set>
- <geometry>left</geometry>
- <type>Dirichlet</type>
- <parameter>t_Dirichlet_left</parameter>
- </boundary_condition>
- <boundary_condition>
- <geometrical_set>cube_1x1x1_geometry</geometrical_set>
- <geometry>right</geometry>
- <type>Dirichlet</type>
- <parameter>t_Dirichlet_right</parameter>
- </boundary_condition>
- </boundary_conditions>
- </process_variable>
- <process_variable>
- <name>p</name>
- <components>1</components>
- <order>1</order>
- <initial_condition>P0</initial_condition>
- <boundary_conditions>
- <boundary_condition>
- <geometrical_set>cube_1x1x1_geometry</geometrical_set>
- <geometry>left0</geometry>
- <type>ConstraintDirichlet</type>
- <constraint_type>Flux</constraint_type>
- <constraining_process_variable>p</constraining_process_variable>
- <constraint_threshold>0.0</constraint_threshold>
- <constraint_direction>greater</constraint_direction>
- <parameter>p_Dirichlet_left0</parameter>
- </boundary_condition>
- <boundary_condition>
- <geometrical_set>cube_1x1x1_geometry</geometrical_set>
- <geometry>left1</geometry>
- <type>ConstraintDirichlet</type>
- <constraint_type>Flux</constraint_type>
- <constraining_process_variable>p</constraining_process_variable>
- <constraint_threshold>0.0</constraint_threshold>
- <constraint_direction>greater</constraint_direction>
- <parameter>p_Dirichlet_left1</parameter>
- </boundary_condition>
- <boundary_condition>
- <geometrical_set>cube_1x1x1_geometry</geometrical_set>
- <geometry>left2</geometry>
- <type>ConstraintDirichlet</type>
- <parameter>p_Dirichlet_left2</parameter>
- <constraint_type>Flux</constraint_type>
- <constraining_process_variable>p</constraining_process_variable>
- <constraint_threshold>0.0</constraint_threshold>
- <constraint_direction>greater</constraint_direction>
- </boundary_condition>
- <boundary_condition>
- <geometrical_set>cube_1x1x1_geometry</geometrical_set>
- <geometry>left3</geometry>
- <type>ConstraintDirichlet</type>
- <constraint_type>Flux</constraint_type>
- <constraining_process_variable>p</constraining_process_variable>
- <constraint_threshold>0.0</constraint_threshold>
- <constraint_direction>greater</constraint_direction>
- <parameter>p_Dirichlet_left3</parameter>
- </boundary_condition>
- <boundary_condition>
- <geometrical_set>cube_1x1x1_geometry</geometrical_set>
- <geometry>left4</geometry>
- <type>ConstraintDirichlet</type>
- <constraint_type>Flux</constraint_type>
- <constraining_process_variable>p</constraining_process_variable>
- <constraint_threshold>0.0</constraint_threshold>
- <constraint_direction>greater</constraint_direction>
- <parameter>p_Dirichlet_left4</parameter>
- </boundary_condition>
- <boundary_condition>
- <geometrical_set>cube_1x1x1_geometry</geometrical_set>
- <geometry>left5</geometry>
- <type>ConstraintDirichlet</type>
- <constraint_type>Flux</constraint_type>
- <constraining_process_variable>p</constraining_process_variable>
- <constraint_threshold>0.0</constraint_threshold>
- <constraint_direction>greater</constraint_direction>
- <parameter>p_Dirichlet_left5</parameter>
- </boundary_condition>
- <boundary_condition>
- <geometrical_set>cube_1x1x1_geometry</geometrical_set>
- <geometry>left6</geometry>
- <type>ConstraintDirichlet</type>
- <constraint_type>Flux</constraint_type>
- <constraining_process_variable>p</constraining_process_variable>
- <constraint_threshold>0.0</constraint_threshold>
- <constraint_direction>greater</constraint_direction>
- <parameter>p_Dirichlet_left6</parameter>
- </boundary_condition>
- <boundary_condition>
- <geometrical_set>cube_1x1x1_geometry</geometrical_set>
- <geometry>left7</geometry>
- <type>ConstraintDirichlet</type>
- <constraint_type>Flux</constraint_type>
- <constraining_process_variable>p</constraining_process_variable>
- <constraint_threshold>0.0</constraint_threshold>
- <constraint_direction>greater</constraint_direction>
- <parameter>p_Dirichlet_left7</parameter>
- </boundary_condition>
- <boundary_condition>
- <geometrical_set>cube_1x1x1_geometry</geometrical_set>
- <geometry>left8</geometry>
- <type>ConstraintDirichlet</type>
- <constraint_type>Flux</constraint_type>
- <constraining_process_variable>p</constraining_process_variable>
- <constraint_threshold>0.0</constraint_threshold>
- <constraint_direction>greater</constraint_direction>
- <parameter>p_Dirichlet_left8</parameter>
- </boundary_condition>
- <boundary_condition>
- <geometrical_set>cube_1x1x1_geometry</geometrical_set>
- <geometry>left9</geometry>
- <type>ConstraintDirichlet</type>
- <constraint_type>Flux</constraint_type>
- <constraining_process_variable>p</constraining_process_variable>
- <constraint_threshold>0.0</constraint_threshold>
- <constraint_direction>greater</constraint_direction>
- <parameter>p_Dirichlet_left9</parameter>
- </boundary_condition>
- <boundary_condition>
- <geometrical_set>cube_1x1x1_geometry</geometrical_set>
- <geometry>right</geometry>
- <type>Dirichlet</type>
- <parameter>p_Dirichlet_right</parameter>
- </boundary_condition>
- </boundary_conditions>
- </process_variable>
- </process_variables>
- <nonlinear_solvers>
- <nonlinear_solver>
- <name>basic_picard</name>
- <type>Picard</type>
- <max_iter>1000</max_iter>
- <linear_solver>general_linear_solver</linear_solver>
- </nonlinear_solver>
- </nonlinear_solvers>
- <linear_solvers>
- <linear_solver>
- <name>general_linear_solver</name>
- <lis>-i bicgstab -p jacobi -tol 1e-12 -maxiter 10000</lis>
- <petsc>
- <prefix>T</prefix>
- <parameters> -T_ksp_type bcgs -T_pc_type bjacobi -T_ksp_rtol 1e-16 -T_ksp_max_it 4000</parameters>
- </petsc>
- <eigen>
- <solver_type>BiCGSTAB</solver_type>
- <precon_type>ILUT</precon_type>
- <max_iteration_step>10000</max_iteration_step>
- <error_tolerance>1e-12</error_tolerance>
- </eigen>
- </linear_solver>
- </linear_solvers>
-</OpenGeoSysProject>
diff --git a/Tests/Data/Parabolic/HT/SimpleSynthetics/constraint_bc_1e3_pcs_0_ts_0_t_0.000000.vtu b/Tests/Data/Parabolic/HT/SimpleSynthetics/constraint_bc_1e3_pcs_0_ts_0_t_0.000000.vtu
deleted file mode 100644
index 154317895b371b18acafb5aa72d70c36ea7cbd89..0000000000000000000000000000000000000000
--- a/Tests/Data/Parabolic/HT/SimpleSynthetics/constraint_bc_1e3_pcs_0_ts_0_t_0.000000.vtu
+++ /dev/null
@@ -1,3 +0,0 @@
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diff --git a/Tests/Data/Parabolic/HT/SimpleSynthetics/constraint_bc_1e3_pcs_0_ts_1_t_0.000000.vtu b/Tests/Data/Parabolic/HT/SimpleSynthetics/constraint_bc_1e3_pcs_0_ts_1_t_0.000000.vtu
deleted file mode 100644
index cf20797ce526e5b43a61b8bb6439dc83dc4a9110..0000000000000000000000000000000000000000
--- a/Tests/Data/Parabolic/HT/SimpleSynthetics/constraint_bc_1e3_pcs_0_ts_1_t_0.000000.vtu
+++ /dev/null
@@ -1,3 +0,0 @@
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diff --git a/Tests/Data/Parabolic/HT/SimpleSynthetics/constraint_bc_1e3_pcs_0_ts_2_t_0.000010.vtu b/Tests/Data/Parabolic/HT/SimpleSynthetics/constraint_bc_1e3_pcs_0_ts_2_t_0.000010.vtu
deleted file mode 100644
index b6d79f82c4604345fe48fc13a2c25b778826334e..0000000000000000000000000000000000000000
--- a/Tests/Data/Parabolic/HT/SimpleSynthetics/constraint_bc_1e3_pcs_0_ts_2_t_0.000010.vtu
+++ /dev/null
@@ -1,3 +0,0 @@
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diff --git a/Tests/Data/Parabolic/HT/SimpleSynthetics/constraint_bc_1e3_pcs_0_ts_3_t_0.001010.vtu b/Tests/Data/Parabolic/HT/SimpleSynthetics/constraint_bc_1e3_pcs_0_ts_3_t_0.001010.vtu
deleted file mode 100644
index 14ed4b5a8ec5e8ca723f14dd04ab65647905be17..0000000000000000000000000000000000000000
--- a/Tests/Data/Parabolic/HT/SimpleSynthetics/constraint_bc_1e3_pcs_0_ts_3_t_0.001010.vtu
+++ /dev/null
@@ -1,3 +0,0 @@
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diff --git a/Tests/Data/Parabolic/HT/SimpleSynthetics/constraint_bc_1e3_pcs_0_ts_4_t_0.101010.vtu b/Tests/Data/Parabolic/HT/SimpleSynthetics/constraint_bc_1e3_pcs_0_ts_4_t_0.101010.vtu
deleted file mode 100644
index d7b4a0ac908274c3d811af23bdda150e045aac41..0000000000000000000000000000000000000000
--- a/Tests/Data/Parabolic/HT/SimpleSynthetics/constraint_bc_1e3_pcs_0_ts_4_t_0.101010.vtu
+++ /dev/null
@@ -1,3 +0,0 @@
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diff --git a/Tests/Data/Parabolic/HT/SimpleSynthetics/constraint_bc_1e3_pcs_0_ts_5_t_1.101010.vtu b/Tests/Data/Parabolic/HT/SimpleSynthetics/constraint_bc_1e3_pcs_0_ts_5_t_1.101010.vtu
deleted file mode 100644
index 6a539f6f86df3c7bdac8d83ac62d9e15548a267a..0000000000000000000000000000000000000000
--- a/Tests/Data/Parabolic/HT/SimpleSynthetics/constraint_bc_1e3_pcs_0_ts_5_t_1.101010.vtu
+++ /dev/null
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diff --git a/Tests/Data/Parabolic/HT/SimpleSynthetics/constraint_bc_1e3_pcs_0_ts_6_t_10.000000.vtu b/Tests/Data/Parabolic/HT/SimpleSynthetics/constraint_bc_1e3_pcs_0_ts_6_t_10.000000.vtu
deleted file mode 100644
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--- a/Tests/Data/Parabolic/HT/SimpleSynthetics/constraint_bc_1e3_pcs_0_ts_6_t_10.000000.vtu
+++ /dev/null
@@ -1,3 +0,0 @@
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