diff --git a/ProcessLib/LiquidFlow/Tests.cmake b/ProcessLib/LiquidFlow/Tests.cmake
index f687102840498c816326ea1acf201f2f2ea28881..cef3da27d11d28bd60c2a54ebf6b32e4a9ef28e0 100644
--- a/ProcessLib/LiquidFlow/Tests.cmake
+++ b/ProcessLib/LiquidFlow/Tests.cmake
@@ -755,3 +755,16 @@ AddTest(
DIFF_DATA
fine_raster_heterogeneous_Subsurface_ts_02_t_2.000000.vtu fine_raster_heterogeneous_Subsurface_ts_02_t_2.000000.vtu p p 1e-14 1e-14
)
+
+AddTest(
+ NAME LiquidFlow_GasFlow
+ PATH Parabolic/LiquidFlow/GasFlow
+ EXECUTABLE ogs
+ EXECUTABLE_ARGS gas_flow.prj
+ RUNTIME 1
+ WRAPPER time
+ TESTER vtkdiff
+ REQUIREMENTS NOT OGS_USE_MPI
+ DIFF_DATA
+ gas_flow_ts_1000_t_100.000000.vtu gas_flow_ts_1000_t_100.000000.vtu pressure pressure 1e-5 5e-6
+)
diff --git a/Tests/Data/Parabolic/LiquidFlow/GasFlow/gas_flow.prj b/Tests/Data/Parabolic/LiquidFlow/GasFlow/gas_flow.prj
new file mode 100644
index 0000000000000000000000000000000000000000..0e932cdaea64261bfa669097526a45c41f6b0fea
--- /dev/null
+++ b/Tests/Data/Parabolic/LiquidFlow/GasFlow/gas_flow.prj
@@ -0,0 +1,174 @@
+<?xml version='1.0' encoding='ISO-8859-1'?>
+<OpenGeoSysProject>
+ <meshes>
+ <mesh>square_1x1_quad8_1e2.vtu</mesh>
+ <mesh>square_1x1_geometry_left.vtu</mesh>
+ </meshes>
+
+ <processes>
+ <process>
+ <name>LF_GAS</name>
+ <type>LIQUID_FLOW</type>
+ <integration_order>3</integration_order>
+ <equation_balance_type>mass</equation_balance_type>
+ <process_variables>
+ <process_variable>pressure</process_variable>
+ </process_variables>
+ <secondary_variables>
+ <secondary_variable internal_name="darcy_velocity" output_name="v"/>
+ </secondary_variables>
+ <specific_body_force>0 0</specific_body_force>
+ </process>
+ </processes>
+ <media>
+ <medium>
+ <phases>
+ <phase>
+ <type>Gas</type>
+ <properties>
+ <property>
+ <name>viscosity</name>
+ <type>Constant</type>
+ <value>1e-5</value>
+ </property>
+ <property>
+ <name>density</name>
+ <type>IdealGasLaw</type>
+ </property>
+ <property>
+ <name>molar_mass</name>
+ <type>Constant</type>
+ <value>0.028964397787206768</value>
+ </property>
+ </properties>
+ </phase>
+ <phase>
+ <type>Solid</type>
+ <properties>
+ <property>
+ <name>density</name>
+ <type>Constant</type>
+ <value>2.17e3</value>
+ </property>
+ </properties>
+ </phase>
+ </phases>
+ <properties>
+ <property>
+ <name>porosity</name>
+ <type>Constant</type>
+ <value>0.03</value>
+ </property>
+ <property>
+ <name>reference_temperature</name>
+ <type>Constant</type>
+ <value>293.15</value>
+ </property>
+ <property>
+ <name>permeability</name>
+ <type>Constant</type>
+ <value>1e-4</value>
+ </property>
+ <property>
+ <name>storage</name>
+ <type>Constant</type>
+ <value> 0.0 </value>
+ </property>
+
+ </properties>
+ </medium>
+ </media>
+ <time_loop>
+ <processes>
+ <process ref="LF_GAS">
+ <nonlinear_solver>basic_picard</nonlinear_solver>
+ <convergence_criterion>
+ <type>DeltaX</type>
+ <norm_type>NORM2</norm_type>
+ <reltol>1.e-6</reltol>
+ </convergence_criterion>
+ <time_discretization>
+ <type>BackwardEuler</type>
+ </time_discretization>
+ <time_stepping>
+ <type>FixedTimeStepping</type>
+ <t_initial>0</t_initial>
+ <t_end>100</t_end>
+ <timesteps>
+ <pair>
+ <repeat>1</repeat>
+ <delta_t>0.1</delta_t>
+ </pair>
+ </timesteps>
+ </time_stepping>
+ </process>
+ </processes>
+ <output>
+ <type>VTK</type>
+ <prefix>gas_flow</prefix>
+ <timesteps>
+ <pair>
+ <repeat>1</repeat>
+ <each_steps>1000</each_steps>
+ </pair>
+ </timesteps>
+ <variables>
+ <variable>pressure</variable>
+ <variable>velocity</variable>
+ </variables>
+ <suffix>_ts_{:timestep}_t_{:time}</suffix>
+ </output>
+ </time_loop>
+ <parameters>
+ <parameter>
+ <name>pressure0</name>
+ <type>Constant</type>
+ <values>1e5</values>
+ </parameter>
+ <parameter>
+ <name>zero</name>
+ <type>Constant</type>
+ <value>0</value>
+ </parameter>
+ <parameter>
+ <name>flux</name>
+ <type>Constant</type>
+ <value>1e-3</value>
+ </parameter>
+ </parameters>
+ <process_variables>
+ <process_variable>
+ <name>pressure</name>
+ <components>1</components>
+ <order>2</order>
+ <initial_condition>pressure0</initial_condition>
+ <boundary_conditions>
+ <boundary_condition>
+ <mesh>square_1x1_geometry_left</mesh>
+ <type>Neumann</type>
+ <parameter>flux</parameter>
+ </boundary_condition>
+ </boundary_conditions>
+ </process_variable>
+ </process_variables>
+ <nonlinear_solvers>
+ <nonlinear_solver>
+ <name>basic_picard</name>
+ <type>Picard</type>
+ <max_iter>100</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 ilu -tol 1e-16 -maxiter 10000</lis>
+ <eigen>
+ <solver_type>BiCGSTAB</solver_type>
+ <precon_type>ILUT</precon_type>
+ <max_iteration_step>3000</max_iteration_step>
+ <error_tolerance>1e-18</error_tolerance>
+ </eigen>
+ </linear_solver>
+ </linear_solvers>
+</OpenGeoSysProject>
diff --git a/Tests/Data/Parabolic/LiquidFlow/GasFlow/gas_flow_ts_1000_t_100.000000.vtu b/Tests/Data/Parabolic/LiquidFlow/GasFlow/gas_flow_ts_1000_t_100.000000.vtu
new file mode 100644
index 0000000000000000000000000000000000000000..402916d078a9c7f12aa6f81265d1546e14e60393
--- /dev/null
+++ b/Tests/Data/Parabolic/LiquidFlow/GasFlow/gas_flow_ts_1000_t_100.000000.vtu
@@ -0,0 +1,26 @@
+<?xml version="1.0"?>
+<VTKFile type="UnstructuredGrid" version="1.0" byte_order="LittleEndian" header_type="UInt64" compressor="vtkZLibDataCompressor">
+ <UnstructuredGrid>
+ <FieldData>
+ <DataArray type="Int8" Name="OGS_VERSION" NumberOfTuples="24" format="appended" RangeMin="45" RangeMax="121" offset="0" />
+ </FieldData>
+ <Piece NumberOfPoints="341" NumberOfCells="100" >
+ <PointData>
+ <DataArray type="Float64" Name="pressure" format="appended" RangeMin="380514.46727" RangeMax="380514.46728" offset="88" />
+ </PointData>
+ <CellData>
+ </CellData>
+ <Points>
+ <DataArray type="Float64" Name="Points" NumberOfComponents="3" format="appended" RangeMin="0" RangeMax="1.4142135624" offset="1276" />
+ </Points>
+ <Cells>
+ <DataArray type="Int64" Name="connectivity" format="appended" RangeMin="" RangeMax="" offset="2732" />
+ <DataArray type="Int64" Name="offsets" format="appended" RangeMin="" RangeMax="" offset="4472" />
+ <DataArray type="UInt8" Name="types" format="appended" RangeMin="" RangeMax="" offset="4740" />
+ </Cells>
+ </Piece>
+ </UnstructuredGrid>
+ <AppendedData encoding="base64">
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+ </AppendedData>
+</VTKFile>
diff --git a/Tests/Data/Parabolic/LiquidFlow/GasFlow/square_1x1_geometry_left.vtu b/Tests/Data/Parabolic/LiquidFlow/GasFlow/square_1x1_geometry_left.vtu
new file mode 100644
index 0000000000000000000000000000000000000000..745def4647e54e942bcc58eb3dbbd69fa35a8d38
--- /dev/null
+++ b/Tests/Data/Parabolic/LiquidFlow/GasFlow/square_1x1_geometry_left.vtu
@@ -0,0 +1,24 @@
+<?xml version="1.0"?>
+<VTKFile type="UnstructuredGrid" version="1.0" byte_order="LittleEndian" header_type="UInt64">
+ <UnstructuredGrid>
+ <Piece NumberOfPoints="21" NumberOfCells="10" >
+ <PointData>
+ <DataArray type="UInt64" Name="bulk_node_ids" format="appended" RangeMin="0" RangeMax="311" offset="0" />
+ </PointData>
+ <CellData>
+ <DataArray type="UInt64" Name="bulk_element_ids" format="appended" RangeMin="0" RangeMax="90" offset="236" />
+ </CellData>
+ <Points>
+ <DataArray type="Float64" Name="Points" NumberOfComponents="3" format="appended" RangeMin="0" RangeMax="1" offset="356" />
+ </Points>
+ <Cells>
+ <DataArray type="Int64" Name="connectivity" format="appended" RangeMin="" RangeMax="" offset="1040" />
+ <DataArray type="Int64" Name="offsets" format="appended" RangeMin="" RangeMax="" offset="1372" />
+ <DataArray type="UInt8" Name="types" format="appended" RangeMin="" RangeMax="" offset="1492" />
+ </Cells>
+ </Piece>
+ </UnstructuredGrid>
+ <AppendedData encoding="base64">
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+ </AppendedData>
+</VTKFile>
diff --git a/Tests/Data/Parabolic/LiquidFlow/GasFlow/square_1x1_quad8_1e2.vtu b/Tests/Data/Parabolic/LiquidFlow/GasFlow/square_1x1_quad8_1e2.vtu
new file mode 120000
index 0000000000000000000000000000000000000000..50ed4394207d099eb7b63ff029eab6e210c0158e
--- /dev/null
+++ b/Tests/Data/Parabolic/LiquidFlow/GasFlow/square_1x1_quad8_1e2.vtu
@@ -0,0 +1 @@
+../../../HydroMechanics/IdealGas/flow_no_strain/square_1x1_quad8_1e2.vtu
\ No newline at end of file