diff --git a/module/zfs/spa_misc.c b/module/zfs/spa_misc.c
index 9e7600107333..dc5d5be2de5c 100644
--- a/module/zfs/spa_misc.c
+++ b/module/zfs/spa_misc.c
@@ -2888,10 +2888,10 @@ ZFS_MODULE_PARAM(zfs, zfs_, recover, INT, ZMOD_RW,
 ZFS_MODULE_PARAM(zfs, zfs_, free_leak_on_eio, INT, ZMOD_RW,
 	"Set to ignore IO errors during free and permanently leak the space");
 
-ZFS_MODULE_PARAM(zfs, zfs_, deadman_checktime_ms, ULONG, ZMOD_RW,
+ZFS_MODULE_PARAM(zfs_deadman, zfs_deadman_, checktime_ms, ULONG, ZMOD_RW,
 	"Dead I/O check interval in milliseconds");
 
-ZFS_MODULE_PARAM(zfs, zfs_, deadman_enabled, INT, ZMOD_RW,
+ZFS_MODULE_PARAM(zfs_deadman, zfs_deadman_, enabled, INT, ZMOD_RW,
 	"Enable deadman timer");
 
 ZFS_MODULE_PARAM(zfs_spa, spa_, asize_inflation, INT, ZMOD_RW,
diff --git a/tests/zfs-tests/include/tunables.cfg b/tests/zfs-tests/include/tunables.cfg
index fab852a0a607..7d99c0772cc2 100644
--- a/tests/zfs-tests/include/tunables.cfg
+++ b/tests/zfs-tests/include/tunables.cfg
@@ -27,10 +27,10 @@ COMPRESSED_ARC_ENABLED		compressed_arc_enabled		zfs_compressed_arc_enabled
 CONDENSE_INDIRECT_COMMIT_ENTRY_DELAY_MS	condense.indirect_commit_entry_delay_ms	zfs_condense_indirect_commit_entry_delay_ms
 CONDENSE_MIN_MAPPING_BYTES	condense.min_mapping_bytes	zfs_condense_min_mapping_bytes
 DBUF_CACHE_MAX_BYTES		dbuf_cache.max_bytes		dbuf_cache_max_bytes
-DEADMAN_CHECKTIME_MS		deadman_checktime_ms		zfs_deadman_checktime_ms
-DEADMAN_FAILMODE		deadman_failmode		zfs_deadman_failmode
-DEADMAN_SYNCTIME_MS		deadman_synctime_ms		zfs_deadman_synctime_ms
-DEADMAN_ZIOTIME_MS		deadman_ziotime_ms		zfs_deadman_ziotime_ms
+DEADMAN_CHECKTIME_MS		deadman.checktime_ms		zfs_deadman_checktime_ms
+DEADMAN_FAILMODE		deadman.failmode		zfs_deadman_failmode
+DEADMAN_SYNCTIME_MS		deadman.synctime_ms		zfs_deadman_synctime_ms
+DEADMAN_ZIOTIME_MS		deadman.ziotime_ms		zfs_deadman_ziotime_ms
 DISABLE_IVSET_GUID_CHECK	disable_ivset_guid_check	zfs_disable_ivset_guid_check
 INITIALIZE_CHUNK_SIZE		initialize_chunk_size		zfs_initialize_chunk_size
 INITIALIZE_VALUE		initialize_value		zfs_initialize_value