diff --git a/tests/runfiles/common.run b/tests/runfiles/common.run
index fdc2172b6a65..6bc4bb5832df 100644
--- a/tests/runfiles/common.run
+++ b/tests/runfiles/common.run
@@ -315,7 +315,7 @@ tests = ['zfs_upgrade_001_pos', 'zfs_upgrade_002_pos', 'zfs_upgrade_003_pos',
 tags = ['functional', 'cli_root', 'zfs_upgrade']
 
 [tests/functional/cli_root/zfs_wait]
-tests = ['zfs_wait_deleteq']
+tests = ['zfs_wait_deleteq', 'zfs_wait_getsubopt']
 tags = ['functional', 'cli_root', 'zfs_wait']
 
 [tests/functional/cli_root/zhack]
@@ -551,7 +551,8 @@ tags = ['functional', 'cli_user', 'misc']
 
 [tests/functional/cli_user/zfs_list]
 tests = ['zfs_list_001_pos', 'zfs_list_002_pos', 'zfs_list_003_pos',
-    'zfs_list_004_neg', 'zfs_list_007_pos', 'zfs_list_008_neg']
+    'zfs_list_004_neg', 'zfs_list_005_neg', 'zfs_list_007_pos',
+    'zfs_list_008_neg']
 user =
 tags = ['functional', 'cli_user', 'zfs_list']
 
diff --git a/tests/runfiles/sanity.run b/tests/runfiles/sanity.run
index 383308bb59ff..9faf0e4d9913 100644
--- a/tests/runfiles/sanity.run
+++ b/tests/runfiles/sanity.run
@@ -236,7 +236,7 @@ tests = ['zfs_upgrade_001_pos', 'zfs_upgrade_002_pos', 'zfs_upgrade_006_neg',
 tags = ['functional', 'cli_root', 'zfs_upgrade']
 
 [tests/functional/cli_root/zfs_wait]
-tests = ['zfs_wait_deleteq']
+tests = ['zfs_wait_deleteq', 'zfs_wait_getsubopt']
 tags = ['functional', 'cli_root', 'zfs_wait']
 
 [tests/functional/cli_root/zpool]
diff --git a/tests/zfs-tests/tests/functional/cli_root/zfs_get/zfs_get_006_neg.ksh b/tests/zfs-tests/tests/functional/cli_root/zfs_get/zfs_get_006_neg.ksh
index a91685849069..e19936ef88dc 100755
--- a/tests/zfs-tests/tests/functional/cli_root/zfs_get/zfs_get_006_neg.ksh
+++ b/tests/zfs-tests/tests/functional/cli_root/zfs_get/zfs_get_006_neg.ksh
@@ -47,7 +47,8 @@ log_assert "Verify 'zfs get all' fails with invalid combination scenarios."
 
 set -f	# Force ksh ignore '?' and '*'
 set -A  bad_combine "ALL" "\-R all" "-P all" "-h all" "-rph all" "-RpH all" "-PrH all" \
-		"-o all" "-s all" "-? all" "-* all" "-?* all" "all -r" "all -p" \
+		"-o all" "-s all" "-s none=getsubopt" "-t filesystem=getsubopt" \
+		"-? all" "-* all" "-?* all" "all -r" "all -p" \
 		"all -H" "all -rp" "all -rH" "all -ph" "all -rpH" "all -r $TESTPOOL" \
 		"all -H $TESTPOOL" "all -p $TESTPOOL" "all -r -p -H $TESTPOOL" \
 		"all -rph $TESTPOOL" "all,available,reservation $TESTPOOL" \
diff --git a/tests/zfs-tests/tests/functional/cli_root/zfs_get/zfs_get_007_neg.ksh b/tests/zfs-tests/tests/functional/cli_root/zfs_get/zfs_get_007_neg.ksh
index 9bb00807f1b0..63dfb6a50b52 100755
--- a/tests/zfs-tests/tests/functional/cli_root/zfs_get/zfs_get_007_neg.ksh
+++ b/tests/zfs-tests/tests/functional/cli_root/zfs_get/zfs_get_007_neg.ksh
@@ -51,7 +51,7 @@ set -A  badargs "o name,property,value,resource" "o name" \
 	"-o" "-o ,,,,," "-o -o -o -o" "-o NAME,PROPERTY,VALUE,SOURCE" \
 	"-o name,properTy,value,source" "-o name, property, value,source" \
 	"-o name:property:value:source" "-o name,property:value,source" \
-	"-o name;property;value;source"
+	"-o name;property;value;source" "-o name=getsubopt"
 
 typeset -i i=0
 while (( i < ${#badargs[*]} ))
diff --git a/tests/zfs-tests/tests/functional/cli_root/zfs_wait/Makefile.am b/tests/zfs-tests/tests/functional/cli_root/zfs_wait/Makefile.am
index d401fe68b1e8..5d385d915720 100644
--- a/tests/zfs-tests/tests/functional/cli_root/zfs_wait/Makefile.am
+++ b/tests/zfs-tests/tests/functional/cli_root/zfs_wait/Makefile.am
@@ -2,7 +2,8 @@ pkgdatadir = $(datadir)/@PACKAGE@/zfs-tests/tests/functional/cli_root/zfs_wait
 dist_pkgdata_SCRIPTS = \
 	setup.ksh \
 	cleanup.ksh \
-	zfs_wait_deleteq.ksh
+	zfs_wait_deleteq.ksh \
+	zfs_wait_getsubopt.ksh
 
 dist_pkgdata_DATA = \
 	zfs_wait.kshlib
diff --git a/tests/zfs-tests/tests/functional/cli_root/zfs_wait/zfs_wait_getsubopt.ksh b/tests/zfs-tests/tests/functional/cli_root/zfs_wait/zfs_wait_getsubopt.ksh
new file mode 100755
index 000000000000..d60aec96b7fe
--- /dev/null
+++ b/tests/zfs-tests/tests/functional/cli_root/zfs_wait/zfs_wait_getsubopt.ksh
@@ -0,0 +1,14 @@
+#!/bin/ksh -p
+# SPDX-License-Identifier: 0BSD
+
+. $STF_SUITE/include/libtest.shlib
+
+#
+# DESCRIPTION:
+# zfs wait -t used to accept getsubopt(3)-style deleteq=whatever;
+# it doesn't anymore
+#
+
+log_mustnot zfs wait -t deleteq=getsubopt $TESTPOOL
+
+log_pass "'zfs wait -t' doesn't accept =getsubopt suffixes."
diff --git a/tests/zfs-tests/tests/functional/cli_root/zpool_get/zpool_get_004_neg.ksh b/tests/zfs-tests/tests/functional/cli_root/zpool_get/zpool_get_004_neg.ksh
index 1edd2ba79af9..bbdd32933c81 100755
--- a/tests/zfs-tests/tests/functional/cli_root/zpool_get/zpool_get_004_neg.ksh
+++ b/tests/zfs-tests/tests/functional/cli_root/zpool_get/zpool_get_004_neg.ksh
@@ -51,7 +51,8 @@ set -A arguments "$TESTPOOL $TESTPOOL" "$TESTPOOL rubbish" "-v $TESTPOOL" \
 		"nosuchproperty $TESTPOOL" "--$TESTPOOL" "all all" \
 		"type $TESTPOOL" "usage: $TESTPOOL" "bootfs $TESTPOOL@" \
 		"bootfs,bootfs $TESTPOOL" "name $TESTPOOL" "t%d%s" \
-		"bootfs,delegation $TESTPOOL" "delegation $TESTPOOL@"
+		"bootfs,delegation $TESTPOOL" "delegation $TESTPOOL@" \
+		"-o name=getsubopt allocated $TESTPOOL"
 
 for arg in $arguments
 do
diff --git a/tests/zfs-tests/tests/functional/cli_root/zpool_wait/zpool_wait_usage.ksh b/tests/zfs-tests/tests/functional/cli_root/zpool_wait/zpool_wait_usage.ksh
index 2d6f897092fe..05cbfce5741c 100755
--- a/tests/zfs-tests/tests/functional/cli_root/zpool_wait/zpool_wait_usage.ksh
+++ b/tests/zfs-tests/tests/functional/cli_root/zpool_wait/zpool_wait_usage.ksh
@@ -43,5 +43,7 @@ zpool wait -t scrub fakepool 2>&1 | grep -i 'no such pool' || \
     log_fail "Error message did not contain phrase 'no such pool'."
 zpool wait -t foo $TESTPOOL 2>&1 | grep -i 'invalid activity' || \
     log_fail "Error message did not contain phrase 'invalid activity'."
+zpool wait -t scrub=getsubopt $TESTPOOL 2>&1 | grep -i 'invalid activity' || \
+    log_fail "getsubopt(3) error message did not contain phrase 'invalid activity'."
 
 log_pass "'zpool wait' behaves sensibly when invoked incorrectly."
diff --git a/tests/zfs-tests/tests/functional/cli_user/zfs_list/Makefile.am b/tests/zfs-tests/tests/functional/cli_user/zfs_list/Makefile.am
index 8393072af225..81754f401595 100644
--- a/tests/zfs-tests/tests/functional/cli_user/zfs_list/Makefile.am
+++ b/tests/zfs-tests/tests/functional/cli_user/zfs_list/Makefile.am
@@ -6,6 +6,7 @@ dist_pkgdata_SCRIPTS = \
 	zfs_list_002_pos.ksh \
 	zfs_list_003_pos.ksh \
 	zfs_list_004_neg.ksh \
+	zfs_list_005_neg.ksh \
 	zfs_list_007_pos.ksh \
 	zfs_list_008_neg.ksh
 
diff --git a/tests/zfs-tests/tests/functional/cli_user/zfs_list/zfs_list_005_neg.ksh b/tests/zfs-tests/tests/functional/cli_user/zfs_list/zfs_list_005_neg.ksh
new file mode 100755
index 000000000000..ae374a6f6c14
--- /dev/null
+++ b/tests/zfs-tests/tests/functional/cli_user/zfs_list/zfs_list_005_neg.ksh
@@ -0,0 +1,14 @@
+#!/bin/ksh -p
+# SPDX-License-Identifier: 0BSD
+
+. $STF_SUITE/include/libtest.shlib
+
+#
+# DESCRIPTION:
+# zfs list -t used to accept getsubopt(3)-style filesystem=whatever;
+# it doesn't anymore
+#
+
+log_mustnot zfs list -t filesystem=getsubopt
+
+log_pass "'zfs list -t' doesn't accept =getsubopt suffixes."