diff --git a/taskcluster/ci/test/tests.yml b/taskcluster/ci/test/tests.yml
index d3e3db303af5..3debfa415917 100644
--- a/taskcluster/ci/test/tests.yml
+++ b/taskcluster/ci/test/tests.yml
@@ -226,6 +226,7 @@ gtest:
         by-test-platform:
             linux64-qr/.*: ['mozilla-central', 'try']
             windows.*-pgo/.*: [] # permafails on pgo
+            windows.*-nightly/.*: [] # permafails on nightly too
             default: built-projects
     mozharness:
         script: desktop_unittest.py