diff --git a/src/Mod/Fem/test_files/ccx/Flow1D_mesh.py b/src/Mod/Fem/test_files/ccx/Flow1D_mesh.py
index cdd520608c..1f84aacb56 100644
--- a/src/Mod/Fem/test_files/ccx/Flow1D_mesh.py
+++ b/src/Mod/Fem/test_files/ccx/Flow1D_mesh.py
@@ -33,17 +33,17 @@ def create_nodes_Flow1D(femmesh):
 
 def create_elements_Flow1D(femmesh):
     # elements
-    femmesh.addEdge([1L, 2L, 15L], 1)
-    femmesh.addEdge([2L, 3L, 16L], 2)
-    femmesh.addEdge([3L, 4L, 17L], 3)
-    femmesh.addEdge([4L, 5L, 18L], 4)
-    femmesh.addEdge([5L, 6L, 19L], 5)
-    femmesh.addEdge([6L, 7L, 20L], 6)
-    femmesh.addEdge([7L, 8L, 21L], 7)
-    femmesh.addEdge([8L, 9L, 22L], 8)
-    femmesh.addEdge([9L, 10L, 23L], 9)
-    femmesh.addEdge([10L, 11L, 24L], 10)
-    femmesh.addEdge([11L, 12L, 25L], 11)
-    femmesh.addEdge([12L, 13L, 26L], 12)
-    femmesh.addEdge([13L, 28L, 27L], 13)
+    femmesh.addEdge([1, 2, 15], 1)
+    femmesh.addEdge([2, 3, 16], 2)
+    femmesh.addEdge([3, 4, 17], 3)
+    femmesh.addEdge([4, 5, 18], 4)
+    femmesh.addEdge([5, 6, 19], 5)
+    femmesh.addEdge([6, 7, 20], 6)
+    femmesh.addEdge([7, 8, 21], 7)
+    femmesh.addEdge([8, 9, 22], 8)
+    femmesh.addEdge([9, 10, 23], 9)
+    femmesh.addEdge([10, 11, 24], 10)
+    femmesh.addEdge([11, 12, 25], 11)
+    femmesh.addEdge([12, 13, 26], 12)
+    femmesh.addEdge([13, 28, 27], 13)
     return True