diff --git a/metropolis/pkg/event/memory/BUILD.bazel b/metropolis/pkg/event/memory/BUILD.bazel
index d8c1990..c8a8bae 100644
--- a/metropolis/pkg/event/memory/BUILD.bazel
+++ b/metropolis/pkg/event/memory/BUILD.bazel
@@ -15,4 +15,6 @@
         "memory_test.go",
     ],
     embed = [":memory"],
+    # TODO: https://github.com/monogon-dev/monogon/issues/127
+    flaky = True,
 )