diff --git a/SPECS/abseil-cpp/abseil-cpp.spec b/SPECS/abseil-cpp/abseil-cpp.spec
index 561dbcc3a83..72429292007 100644
--- a/SPECS/abseil-cpp/abseil-cpp.spec
+++ b/SPECS/abseil-cpp/abseil-cpp.spec
@@ -80,6 +80,8 @@ Development headers for %{name}
 %cmake_install
 
 %check
+# Disable flaky waiter tests, which sleep on the monotonic timer and then,
+# inexplicably, test how much time has passed against the system timer.
 %ctest --output-on-failure --exclude-regex waiter_test
 
 %files