--- a/mozilla-tests/config.py
+++ b/mozilla-tests/config.py
@@ -110,17 +110,18 @@ PLATFORMS['win32']['mozharness_config'] 
     'reboot_command': ['c:/mozilla-build/python27/python', '-u'] + MOZHARNESS_REBOOT_CMD,
     'config_file': 'talos/windows_config.py',
 }
 
 PLATFORMS['win64']['slave_platforms'] = ['win8_64', 'win10_64']
 PLATFORMS['win64']['talos_slave_platforms'] = ['win8_64', 'win10_64']
 PLATFORMS['win64']['env_name'] = 'win64-perf'
 PLATFORMS['win64']['stage_product'] = 'firefox'
-PLATFORMS['win64']['win8_64'] = {'name': 'Windows 8 64-bit'}
+PLATFORMS['win64']['win8_64'] = {'name': 'Windows 8 64-bit',
+                                 'try_by_default': False}
 PLATFORMS['win64']['win10_64'] = {'name': 'Windows 10 64-bit',
                                   'try_by_default': False}
 PLATFORMS['win64']['mozharness_config'] = {
     'mozharness_python': ['c:/mozilla-build/python27/python', '-u'],
     'hg_bin': 'c:\\mozilla-build\\hg\\hg',
     'reboot_command': ['c:/mozilla-build/python27/python', '-u'] + MOZHARNESS_REBOOT_CMD,
     'config_file': 'talos/windows_config.py',
 }