--- a/testing/mozharness/configs/builds/releng_base_windows_32_builds.py
+++ b/testing/mozharness/configs/builds/releng_base_windows_32_builds.py
@@ -35,18 +35,18 @@ config = {
     # decides whether we want to use moz_sign_cmd in env
     'enable_signing': True,
     'vcs_share_base': 'C:/builds/hg-shared',
     'objdir': 'obj-firefox',
     'tooltool_script': [sys.executable,
                         'C:/mozilla-build/tooltool.py'],
     'tooltool_bootstrap': "setup.sh",
     'enable_count_ctors': False,
-    'enable_talos_sendchange': True,
-    'enable_unittest_sendchange': True,
+    'enable_talos_sendchange': False,
+    'enable_unittest_sendchange': False,
     'max_build_output_timeout': 60 * 80,
     #########################################################################
 
 
      #########################################################################
      ###### 32 bit specific ######
     'base_name': 'WINNT_5.2_%(branch)s',
     'platform': 'win32',

--- a/testing/mozharness/configs/builds/releng_base_windows_64_builds.py
+++ b/testing/mozharness/configs/builds/releng_base_windows_64_builds.py
@@ -35,18 +35,18 @@ config = {
     # decides whether we want to use moz_sign_cmd in env
     'enable_signing': True,
     'vcs_share_base': 'C:/builds/hg-shared',
     'objdir': 'obj-firefox',
     'tooltool_script': [sys.executable,
                         'C:/mozilla-build/tooltool.py'],
     'tooltool_bootstrap': "setup.sh",
     'enable_count_ctors': False,
-    'enable_talos_sendchange': True,
-    'enable_unittest_sendchange': True,
+    'enable_talos_sendchange': False,
+    'enable_unittest_sendchange': False,
     'max_build_output_timeout': 60 * 80,
     #########################################################################
 
 
      #########################################################################
      ###### 64 bit specific ######
     'base_name': 'WINNT_6.1_x86-64_%(branch)s',
     'platform': 'win64',