diff --git a/tests/zfs-tests/tests/functional/gang_blocks/cleanup.ksh b/tests/zfs-tests/tests/functional/gang_blocks/cleanup.ksh
index 4ae6ec16f..92a1d1aab 100755
--- a/tests/zfs-tests/tests/functional/gang_blocks/cleanup.ksh
+++ b/tests/zfs-tests/tests/functional/gang_blocks/cleanup.ksh
@@ -1,4 +1,5 @@
 #!/bin/ksh -p
+# SPDX-License-Identifier: CDDL-1.0
 #
 # CDDL HEADER START
 #
diff --git a/tests/zfs-tests/tests/functional/gang_blocks/gang_blocks.kshlib b/tests/zfs-tests/tests/functional/gang_blocks/gang_blocks.kshlib
index 8799a1436..553533377 100644
--- a/tests/zfs-tests/tests/functional/gang_blocks/gang_blocks.kshlib
+++ b/tests/zfs-tests/tests/functional/gang_blocks/gang_blocks.kshlib
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: CDDL-1.0
 #
 # CDDL HEADER START
 #
diff --git a/tests/zfs-tests/tests/functional/gang_blocks/gang_blocks_redundant.ksh b/tests/zfs-tests/tests/functional/gang_blocks/gang_blocks_redundant.ksh
index 1c44a7c5e..504d6aa47 100755
--- a/tests/zfs-tests/tests/functional/gang_blocks/gang_blocks_redundant.ksh
+++ b/tests/zfs-tests/tests/functional/gang_blocks/gang_blocks_redundant.ksh
@@ -1,4 +1,5 @@
 #!/bin/ksh
+# SPDX-License-Identifier: CDDL-1.0
 #
 # This file and its contents are supplied under the terms of the
 # Common Development and Distribution License ("CDDL"), version 1.0.
diff --git a/tests/zfs-tests/tests/functional/gang_blocks/setup.ksh b/tests/zfs-tests/tests/functional/gang_blocks/setup.ksh
index 0d2b239a0..05bfb0470 100755
--- a/tests/zfs-tests/tests/functional/gang_blocks/setup.ksh
+++ b/tests/zfs-tests/tests/functional/gang_blocks/setup.ksh
@@ -1,4 +1,5 @@
 #!/bin/ksh -p
+# SPDX-License-Identifier: CDDL-1.0
 #
 # CDDL HEADER START
 #