diff --git a/tests/test-runner/bin/zts-report.py.in b/tests/test-runner/bin/zts-report.py.in
index fddc30158..90d4c1277 100755
--- a/tests/test-runner/bin/zts-report.py.in
+++ b/tests/test-runner/bin/zts-report.py.in
@@ -255,6 +255,7 @@ maybe = {
     'raidz/raidz_002_pos': ['FAIL', known_reason],
     'raidz/raidz_expand_001_pos': ['FAIL', 16421],
     'redundancy/redundancy_draid_spare1': ['FAIL', 18307],
+    'redundancy/redundancy_draid_spare3': ['FAIL', 18319],
     'removal/removal_condense_export': ['FAIL', known_reason],
     'renameat2/setup': ['SKIP', renameat2_reason],
     'reservation/reservation_008_pos': ['FAIL', 7741],