diff --git a/test/porousmediumflow/1p2c/implicit/test_box1p2c.input b/test/porousmediumflow/1p2c/implicit/test_box1p2c.input
index 5b8a2f8f9e8b9d7eb22ab09209f7186165a7b0c7..85a6863ffc9d55dd83165058342f7f38da8dc4a7 100644
--- a/test/porousmediumflow/1p2c/implicit/test_box1p2c.input
+++ b/test/porousmediumflow/1p2c/implicit/test_box1p2c.input
@@ -3,7 +3,9 @@ DtInitial = 1 # [s]
 TEnd = 100 # [s]
 
 [Grid]
-File = ./grids/test_1p2c.dgf
+LowerLeft = 0 0
+UpperRight = 1 1
+Cells = 20 2
 
 [Problem]
 Name = outflowbox # name passed to the output routines
diff --git a/test/porousmediumflow/1p2c/implicit/test_box1p2cniconduction.input b/test/porousmediumflow/1p2c/implicit/test_box1p2cniconduction.input
index 5d67364a7be997e135aadd9050b30776ae68c3a5..043d32f050a1146e5cc74f67848be2ab4ef58316 100644
--- a/test/porousmediumflow/1p2c/implicit/test_box1p2cniconduction.input
+++ b/test/porousmediumflow/1p2c/implicit/test_box1p2cniconduction.input
@@ -4,7 +4,9 @@ TEnd = 1e5 # [s]
 MaxTimeStepSize = 1e10
 
 [Grid]
-File = ./grids/test_1p2cniconduction.dgf
+LowerLeft = 0 0
+UpperRight = 5 1
+Cells = 200 1
 
 [Problem]
 Name = box1p2cniconduction # name passed to the output routines
diff --git a/test/porousmediumflow/1p2c/implicit/test_box1p2cniconvection.input b/test/porousmediumflow/1p2c/implicit/test_box1p2cniconvection.input
index fdf98dfecee93f5c2dbd466e39998a63a12c6370..e51f197be164b74692e93d9b50c57a7e84f12d04 100644
--- a/test/porousmediumflow/1p2c/implicit/test_box1p2cniconvection.input
+++ b/test/porousmediumflow/1p2c/implicit/test_box1p2cniconvection.input
@@ -4,7 +4,9 @@ TEnd = 3e4 # [s]
 MaxTimeStepSize = 1e3
 
 [Grid]
-File = ./grids/test_1p2cniconvection.dgf
+LowerLeft = 0 0
+UpperRight = 20 1
+Cells = 80 1
 
 [Problem]
 Name = box1p2cniconvection # name passed to the output routines
diff --git a/test/porousmediumflow/1p2c/implicit/test_cc1p2c.input b/test/porousmediumflow/1p2c/implicit/test_cc1p2c.input
index 50d5b99098abe43241b427027af4b941cf1de484..cd2cbb7cb0aff281e9af853048a9b6a8150294a6 100644
--- a/test/porousmediumflow/1p2c/implicit/test_cc1p2c.input
+++ b/test/porousmediumflow/1p2c/implicit/test_cc1p2c.input
@@ -3,7 +3,9 @@ DtInitial = 1 # [s]
 TEnd = 100 # [s]
 
 [Grid]
-File = ./grids/test_1p2c.dgf
+LowerLeft = 0 0
+UpperRight = 1 1
+Cells = 20 2
 
 [Problem]
 Name = outflowcc # name passed to the output routines
diff --git a/test/porousmediumflow/1p2c/implicit/test_cc1p2cniconduction.input b/test/porousmediumflow/1p2c/implicit/test_cc1p2cniconduction.input
index 7636c68a302a626e3580ef73b8ed750ab81b6902..87eb774f485e6d278fa8a3074099c08ec4824f20 100644
--- a/test/porousmediumflow/1p2c/implicit/test_cc1p2cniconduction.input
+++ b/test/porousmediumflow/1p2c/implicit/test_cc1p2cniconduction.input
@@ -4,7 +4,10 @@ TEnd = 1e5 # [s]
 MaxTimeStepSize = 1e10
 
 [Grid]
-File = ./grids/test_1p2cniconduction.dgf
+LowerLeft = 0 0
+UpperRight = 5 1
+Cells = 200 1
+
 
 [Problem]
 Name = cc1p2cniconduction # name passed to the output routines
diff --git a/test/porousmediumflow/1p2c/implicit/test_cc1p2cniconvection.input b/test/porousmediumflow/1p2c/implicit/test_cc1p2cniconvection.input
index eb25b226fd669a7721d064dc696531de7ce37cb9..1814da96df949992d53a617b5d78b3693928d47e 100644
--- a/test/porousmediumflow/1p2c/implicit/test_cc1p2cniconvection.input
+++ b/test/porousmediumflow/1p2c/implicit/test_cc1p2cniconvection.input
@@ -4,7 +4,9 @@ TEnd = 3e4 # [s]
 MaxTimeStepSize = 1e3
 
 [Grid]
-File = ./grids/test_1p2cniconvection.dgf
+LowerLeft = 0 0
+UpperRight = 20 1
+Cells = 80 1
 
 [Problem]
 Name = cc1p2cniconvection # name passed to the output routines