diff --git a/fuzzers/074-dump_all/generate_grid.py b/fuzzers/074-dump_all/generate_grid.py
index 80cb5f20..82f98502 100644
--- a/fuzzers/074-dump_all/generate_grid.py
+++ b/fuzzers/074-dump_all/generate_grid.py
@@ -19,9 +19,16 @@ def get_tile_grid_info(fname):
     with open(fname, 'r') as f:
         tile = json5.load(f)
 
+    tile_type = tile['type']
+    ignored = int(tile['ignored']) != 0
+
+    if ignored:
+        tile_type = 'NULL'
+
     return {
         tile['tile']: {
-            'type': tile['type'],
+            'type': tile_type,
+            'ignored': ignored,
             'grid_x': tile['x'],
             'grid_y': tile['y'],
             'sites': dict(
@@ -592,6 +599,12 @@ def main():
 
         for tile in db_grid_keys:
             for k in grid2[tile]:
+                if k == 'ignored':
+                    continue
+
+                if k == 'sites' and grid2[tile]['ignored']:
+                    continue
+
                 assert k in grid[tile], k
                 assert grid[tile][k] == grid2[tile][k], (
                     tile, k, grid[tile][k], grid2[tile][k])
diff --git a/fuzzers/074-dump_all/jobtiles.tcl b/fuzzers/074-dump_all/jobtiles.tcl
index 55cdd550..15336674 100644
--- a/fuzzers/074-dump_all/jobtiles.tcl
+++ b/fuzzers/074-dump_all/jobtiles.tcl
@@ -30,7 +30,9 @@ for {set j $start } { $j < $stop } { incr j } {
     # If tile is not allowed, skip it
     set res [lsearch $not_allowed_tiles $tile]
     if { $res != -1 } {
-        continue
+        set ignored 1
+    } else {
+        set ignored 0
     }
 
     set fname tile_$tile.json5
@@ -40,6 +42,7 @@ for {set j $start } { $j < $stop } { incr j } {
     set fp [open "${fname}" w]
     puts $fp "\{"
     puts $fp "\t\"tile\": \"$tile\","
+    puts $fp "\t\"ignored\": \"$ignored\","
     # tile properties:
     # CLASS COLUMN DEVICE_ID FIRST_SITE_ID GRID_POINT_X GRID_POINT_Y INDEX
     # INT_TILE_X INT_TILE_Y IS_CENTER_TILE IS_DCM_TILE IS_GT_CLOCK_SITE_TILE