diff --git a/tests/funcs/filter.sh b/tests/funcs/filter.sh
index 5e4675b5..6e5fa2e2 100644
--- a/tests/funcs/filter.sh
+++ b/tests/funcs/filter.sh
@@ -121,6 +121,7 @@ t_filter_dmesg()
 
 	# in debugging kernels we can slow things down a bit
 	re="$re|hrtimer: interrupt took .*"
+	re="$re|clocksource: Long readout interval"
 
 	# fencing tests force unmounts and trigger timeouts
 	re="$re|scoutfs .* forcing unmount"