diff --git a/Tests/Data/Elliptic/circle_radius_1/circle_1e1_axi.prj b/Tests/Data/Elliptic/circle_radius_1/circle_1e1_axi.prj
index d34028d67a67a0a45760dac0256bdb9180bcebf1..99d8d7b71c087bad3c8a18da36ab72082d10efa7 100644
--- a/Tests/Data/Elliptic/circle_radius_1/circle_1e1_axi.prj
+++ b/Tests/Data/Elliptic/circle_radius_1/circle_1e1_axi.prj
@@ -84,6 +84,11 @@
             <type>Constant</type>
             <value>0</value>
         </parameter>
+        <parameter>
+            <name>pressure_source_term</name>
+            <type>Constant</type>
+            <value>1</value>
+        </parameter>
     </parameters>
     <process_variables>
         <process_variable>
@@ -104,7 +109,7 @@
                     <geometrical_set>geometry</geometrical_set>
                     <geometry>inner</geometry>
                     <type>Nodal</type>
-                    <value>1</value>
+                    <parameter>pressure_source_term</parameter>
                 </source_term>
             </source_terms>
         </process_variable>
diff --git a/Tests/Data/Elliptic/circle_radius_1/circle_1e2_axi.prj b/Tests/Data/Elliptic/circle_radius_1/circle_1e2_axi.prj
index 77b9d2c4e7f97f408695b52e66da16dcc663e5d4..1927850dbfb2950eee440412197c180a5d258968 100644
--- a/Tests/Data/Elliptic/circle_radius_1/circle_1e2_axi.prj
+++ b/Tests/Data/Elliptic/circle_radius_1/circle_1e2_axi.prj
@@ -84,6 +84,11 @@
             <type>Constant</type>
             <value>0</value>
         </parameter>
+        <parameter>
+            <name>pressure_source_term</name>
+            <type>Constant</type>
+            <value>1</value>
+        </parameter>
     </parameters>
     <process_variables>
         <process_variable>
@@ -104,7 +109,7 @@
                     <geometrical_set>geometry</geometrical_set>
                     <geometry>inner</geometry>
                     <type>Nodal</type>
-                    <value>1</value>
+                    <parameter>pressure_source_term</parameter>
                 </source_term>
             </source_terms>
         </process_variable>
diff --git a/Tests/Data/Elliptic/circle_radius_1/circle_1e3_axi.prj b/Tests/Data/Elliptic/circle_radius_1/circle_1e3_axi.prj
index 89c7ddc6b473046ea101b5e55758948b9194e16e..1db7377709f19de8c7a8d1db4760d3253256d062 100644
--- a/Tests/Data/Elliptic/circle_radius_1/circle_1e3_axi.prj
+++ b/Tests/Data/Elliptic/circle_radius_1/circle_1e3_axi.prj
@@ -84,6 +84,11 @@
             <type>Constant</type>
             <value>0</value>
         </parameter>
+        <parameter>
+            <name>pressure_source_term</name>
+            <type>Constant</type>
+            <value>1</value>
+        </parameter>
     </parameters>
     <process_variables>
         <process_variable>
@@ -104,7 +109,7 @@
                     <geometrical_set>geometry</geometrical_set>
                     <geometry>inner</geometry>
                     <type>Nodal</type>
-                    <value>1</value>
+                    <parameter>pressure_source_term</parameter>
                 </source_term>
             </source_terms>
         </process_variable>
diff --git a/Tests/Data/Elliptic/circle_radius_1/circle_1e4_axi.prj b/Tests/Data/Elliptic/circle_radius_1/circle_1e4_axi.prj
index 2ef9e67c9d9a6ba8876d82abd519f694ed68e942..ec83cb0489b1e0516b699e455fd8d6835f9e6813 100644
--- a/Tests/Data/Elliptic/circle_radius_1/circle_1e4_axi.prj
+++ b/Tests/Data/Elliptic/circle_radius_1/circle_1e4_axi.prj
@@ -84,6 +84,11 @@
             <type>Constant</type>
             <value>0</value>
         </parameter>
+        <parameter>
+            <name>pressure_source_term</name>
+            <type>Constant</type>
+            <value>1</value>
+        </parameter>
     </parameters>
     <process_variables>
         <process_variable>
@@ -104,7 +109,7 @@
                     <geometrical_set>geometry</geometrical_set>
                     <geometry>inner</geometry>
                     <type>Nodal</type>
-                    <value>1</value>
+                    <parameter>pressure_source_term</parameter>
                 </source_term>
             </source_terms>
         </process_variable>
diff --git a/Tests/Data/Elliptic/circle_radius_1/circle_1e5_axi.prj b/Tests/Data/Elliptic/circle_radius_1/circle_1e5_axi.prj
index 436391d00c192f63916919435c04998faca7326f..9df67ae0db1e69f21fd9d2066bc6da54626283de 100644
--- a/Tests/Data/Elliptic/circle_radius_1/circle_1e5_axi.prj
+++ b/Tests/Data/Elliptic/circle_radius_1/circle_1e5_axi.prj
@@ -84,6 +84,11 @@
             <type>Constant</type>
             <value>0</value>
         </parameter>
+        <parameter>
+            <name>pressure_source_term</name>
+            <type>Constant</type>
+            <value>1</value>
+        </parameter>
     </parameters>
     <process_variables>
         <process_variable>
@@ -104,7 +109,7 @@
                     <geometrical_set>geometry</geometrical_set>
                     <geometry>inner</geometry>
                     <type>Nodal</type>
-                    <value>1</value>
+                    <parameter>pressure_source_term</parameter>
                 </source_term>
             </source_terms>
         </process_variable>
diff --git a/Tests/Data/Elliptic/circle_radius_1/circle_1e6_axi.prj b/Tests/Data/Elliptic/circle_radius_1/circle_1e6_axi.prj
index 86470dd0ef918fdfcf28e6ccf9ee4c75eda7afb9..411c1c9052404785f6b6ee752723b7450ee3cb36 100644
--- a/Tests/Data/Elliptic/circle_radius_1/circle_1e6_axi.prj
+++ b/Tests/Data/Elliptic/circle_radius_1/circle_1e6_axi.prj
@@ -81,6 +81,11 @@
             <type>Constant</type>
             <value>0</value>
         </parameter>
+        <parameter>
+            <name>pressure_source_term</name>
+            <type>Constant</type>
+            <value>1</value>
+        </parameter>
     </parameters>
     <process_variables>
         <process_variable>
@@ -101,7 +106,7 @@
                     <geometrical_set>geometry</geometrical_set>
                     <geometry>inner</geometry>
                     <type>Nodal</type>
-                    <value>1</value>
+                    <parameter>pressure_source_term</parameter>
                 </source_term>
             </source_terms>
         </process_variable>
diff --git a/Tests/Data/Elliptic/square_1x1_GroundWaterFlow/square_1e6_with_nodal_sources.prj b/Tests/Data/Elliptic/square_1x1_GroundWaterFlow/square_1e6_with_nodal_sources.prj
index fc58c74366310608744fbb6f68bdf6c4977a6052..3ab93dd092fa89781c88cfe961f76e0690578205 100644
--- a/Tests/Data/Elliptic/square_1x1_GroundWaterFlow/square_1e6_with_nodal_sources.prj
+++ b/Tests/Data/Elliptic/square_1x1_GroundWaterFlow/square_1e6_with_nodal_sources.prj
@@ -65,6 +65,11 @@
             <type>Constant</type>
             <value>0</value>
         </parameter>
+        <parameter>
+            <name>pressure_source_term</name>
+            <type>Constant</type>
+            <value>1</value>
+        </parameter>
     </parameters>
     <process_variables>
         <process_variable>
@@ -91,7 +96,7 @@
                     <geometrical_set>square_1x1_geometry</geometrical_set>
                     <geometry>middle_point</geometry>
                     <type>Nodal</type>
-                    <value>1</value>
+                    <parameter>pressure_source_term</parameter>
                 </source_term>
             </source_terms>
         </process_variable>