diff --git a/Tests/Data/Parabolic/LiquidFlow/SimpleSynthetics/XDMF/square_5x5_tris_32_left_boundary.vtu b/Tests/Data/Parabolic/LiquidFlow/SimpleSynthetics/XDMF/square_5x5_tris_32_left_boundary.vtu
index 52b20854c8fa372bdc09ddcf39b91e323c1982ae..0a0fe2a4ed392cd096a435fd77790c143de6f5cc 100644
--- a/Tests/Data/Parabolic/LiquidFlow/SimpleSynthetics/XDMF/square_5x5_tris_32_left_boundary.vtu
+++ b/Tests/Data/Parabolic/LiquidFlow/SimpleSynthetics/XDMF/square_5x5_tris_32_left_boundary.vtu
@@ -1,51 +1,24 @@
+<?xml version="1.0"?>
 <VTKFile type="UnstructuredGrid" version="1.0" byte_order="LittleEndian" header_type="UInt64">
   <UnstructuredGrid>
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-        <DataArray type="UInt64" IdType="1" Name="bulk_node_ids" format="ascii" RangeMin="0" RangeMax="20">
-          5 0 10 15 20
-        </DataArray>
+    <Piece NumberOfPoints="5"                    NumberOfCells="4"                   >
+      <PointData>
+        <DataArray type="UInt64" Name="bulk_node_ids" format="appended" RangeMin="0"                    RangeMax="20"                   offset="0"                   />
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-      <CellData Scalars="bulk_element_ids">
-        <DataArray type="UInt64" IdType="1" Name="bulk_element_ids" format="ascii" RangeMin="0" RangeMax="24">
-          0 8 16 24
-        </DataArray>
+      <CellData>
+        <DataArray type="UInt64" Name="bulk_element_ids" format="appended" RangeMin="0"                    RangeMax="24"                   offset="64"                  />
       </CellData>
       <Points>
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-            <Value index="1">
-              5
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+        <DataArray type="Float64" Name="Points" NumberOfComponents="3" format="appended" RangeMin="0"                    RangeMax="5"                    offset="120"                 />
       </Points>
       <Cells>
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-          4 3
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-          2 4 6 8
-        </DataArray>
-        <DataArray type="UInt8" Name="types" format="ascii" RangeMin="3" RangeMax="3">
-          3 3 3 3
-        </DataArray>
+        <DataArray type="Int64" Name="connectivity" format="appended" RangeMin=""                     RangeMax=""                     offset="292"                 />
+        <DataArray type="Int64" Name="offsets" format="appended" RangeMin=""                     RangeMax=""                     offset="388"                 />
+        <DataArray type="UInt8" Name="types" format="appended" RangeMin=""                     RangeMax=""                     offset="444"                 />
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   </UnstructuredGrid>
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+  </AppendedData>
 </VTKFile>
diff --git a/Tests/Data/Parabolic/LiquidFlow/SimpleSynthetics/XDMF/square_5x5_tris_32_right_boundary.vtu b/Tests/Data/Parabolic/LiquidFlow/SimpleSynthetics/XDMF/square_5x5_tris_32_right_boundary.vtu
index 8df915d4a239106d1144e779cc796a10dd270e87..b8e6962db160b1e4fb16178c1d9a62e8c902883d 100644
--- a/Tests/Data/Parabolic/LiquidFlow/SimpleSynthetics/XDMF/square_5x5_tris_32_right_boundary.vtu
+++ b/Tests/Data/Parabolic/LiquidFlow/SimpleSynthetics/XDMF/square_5x5_tris_32_right_boundary.vtu
@@ -1,51 +1,24 @@
+<?xml version="1.0"?>
 <VTKFile type="UnstructuredGrid" version="1.0" byte_order="LittleEndian" header_type="UInt64">
   <UnstructuredGrid>
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-        <DataArray type="UInt64" IdType="1" Name="bulk_node_ids" format="ascii" RangeMin="4" RangeMax="24">
-          4 9 14 19 24
-        </DataArray>
+    <Piece NumberOfPoints="5"                    NumberOfCells="4"                   >
+      <PointData>
+        <DataArray type="UInt64" Name="bulk_node_ids" format="appended" RangeMin="4"                    RangeMax="24"                   offset="0"                   />
       </PointData>
-      <CellData Scalars="bulk_element_ids">
-        <DataArray type="UInt64" IdType="1" Name="bulk_element_ids" format="ascii" RangeMin="7" RangeMax="31">
-          7 15 23 31
-        </DataArray>
+      <CellData>
+        <DataArray type="UInt64" Name="bulk_element_ids" format="appended" RangeMin="7"                    RangeMax="31"                   offset="64"                  />
       </CellData>
       <Points>
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-          5 2.5 3 5 3.75 3
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-              5
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-            <Value index="1">
-              7.0710678119
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-        </DataArray>
+        <DataArray type="Float64" Name="Points" NumberOfComponents="3" format="appended" RangeMin="5"                    RangeMax="7.0710678119"         offset="120"                 />
       </Points>
       <Cells>
-        <DataArray type="Int64" Name="connectivity" format="ascii" RangeMin="0" RangeMax="4">
-          0 1 1 2 2 3
-          3 4
-        </DataArray>
-        <DataArray type="Int64" Name="offsets" format="ascii" RangeMin="2" RangeMax="8">
-          2 4 6 8
-        </DataArray>
-        <DataArray type="UInt8" Name="types" format="ascii" RangeMin="3" RangeMax="3">
-          3 3 3 3
-        </DataArray>
+        <DataArray type="Int64" Name="connectivity" format="appended" RangeMin=""                     RangeMax=""                     offset="292"                 />
+        <DataArray type="Int64" Name="offsets" format="appended" RangeMin=""                     RangeMax=""                     offset="388"                 />
+        <DataArray type="UInt8" Name="types" format="appended" RangeMin=""                     RangeMax=""                     offset="444"                 />
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     </Piece>
   </UnstructuredGrid>
+  <AppendedData encoding="base64">
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+  </AppendedData>
 </VTKFile>