--- a/mozilla-tests/production_config.py
+++ b/mozilla-tests/production_config.py
@@ -35,20 +35,20 @@ for i in range(1, 101) + range(102, 600)
 
 for i in range(1, 201):
     SLAVES['win7_vm_gfx']['g-w732-spot-%03i' % i] = {}
 
 # Bug 1302530 - Add ondemand g-w732 instances
 for i in range(1, 101):
     SLAVES['win7_vm_gfx']['g-w732-ec2-%03i' % i] = {}
 
-for i in range(1, 102) + range(103, 207) + range(208, 337):  # Omit 102 for win10 // Bug 1191481 // Bug 1255812 // Bug 1299468 // Bug 1317723 //Bug1397225
+for i in range(1, 102) + range(103, 207) + range(208, 307):  # Omit 102 for win10 // Bug 1191481 // Bug 1255812 // Bug 1299468 // Bug 1317723 //Bug1397225 //Bug1397879
     SLAVES['win8']['t-w864-ix-%03i' % i] = {}
 
-for i in range(1, 96):
+for i in range(1, 126):
     SLAVES['win10']['t-w1064-ix-%03i' % i] = {}
 
 for i in range(1, 393):
     SLAVES['yosemite_r7']['t-yosemite-r7-%04i' % i] = {}
 
 for i in range(1, 800) + range(1000, 1100):
     SLAVES['ubuntu32_vm']['tst-linux32-spot-%03i' % i] = {}