--- a/mozilla-tests/mobile_config.py
+++ b/mozilla-tests/mobile_config.py
@@ -2988,17 +2988,17 @@ for name, branch in items_at_least(BRANC
 
 remove_suite_from_slave_platform(BRANCHES, PLATFORMS, 'mochitest-chrome', 'ubuntu64_vm_armv7_mobile', branches_to_keep=trunk_branches)
 remove_suite_from_slave_platform(BRANCHES, PLATFORMS, 'mochitest-chrome', 'ubuntu64_vm_armv7_large', branches_to_keep=trunk_branches)
 remove_suite_from_slave_platform(BRANCHES, PLATFORMS, 'mochitest-chrome', 'ubuntu64_vm_mobile', branches_to_keep=trunk_branches)
 remove_suite_from_slave_platform(BRANCHES, PLATFORMS, 'mochitest-chrome', 'ubuntu64_vm_large', branches_to_keep=trunk_branches)
 
 
 # Bug 1282849 - disable fennec debug builds and tests in buildbot
-for name, branch in items_at_least(BRANCHES, 'gecko_version', 50):
+for name, branch in items_at_least(BRANCHES, 'gecko_version', 51):
     for platform in branch['platforms'].keys():
         if platform not in ['android-api-15']:
             continue
         for slave_platform in ['ubuntu64_vm_armv7_mobile', 'ubuntu64_vm_armv7_large']:
             BRANCHES[name]['platforms'][platform][slave_platform]['debug_unittest_suites'] = []
 
 # Bug 1293730 - Fennec x86 builds as tier 1
 for name, branch in items_at_least(BRANCHES, 'gecko_version', 51):

--- a/mozilla/config.py
+++ b/mozilla/config.py
@@ -2871,17 +2871,17 @@ for name, branch in items_before(BRANCHE
 ##Bug 1268542 - Disable Linux64 Debug builds and tests in buildbot
 for name, branch in items_at_least(BRANCHES, 'gecko_version', 48):
     for platform in branch['platforms'].keys():
         if platform not in ['linux64-debug']:
             continue
         del branch['platforms'][platform]
 
 # Bug 1282849 - disable fennec debug builds and tests in buildbot
-for name, branch in items_at_least(BRANCHES, 'gecko_version', 50):
+for name, branch in items_at_least(BRANCHES, 'gecko_version', 51):
     for platform in branch['platforms'].keys():
         if platform not in ['android-api-15-debug']:
             continue
         del branch['platforms'][platform]
 
 #Bug 1282468 - disable buildbot asan builds on trunk
 for name, branch in items_at_least(BRANCHES, 'gecko_version', 51):
     for platform in branch['platforms'].keys():