diff --git a/target/linux/kirkwood/Makefile b/target/linux/kirkwood/Makefile
index 4827d90ee2d..133208dd258 100644
--- a/target/linux/kirkwood/Makefile
+++ b/target/linux/kirkwood/Makefile
@@ -11,8 +11,7 @@ FEATURES:=usb nand squashfs ramdisk
 CPU_TYPE:=xscale
 SUBTARGETS:=generic
 
-KERNEL_PATCHVER:=5.10
-KERNEL_TESTING_PATCHVER:=5.15
+KERNEL_PATCHVER:=5.15
 
 include $(INCLUDE_DIR)/target.mk
 
diff --git a/target/linux/octeon/Makefile b/target/linux/octeon/Makefile
index beb3e5436ad..4b5c4c07c10 100644
--- a/target/linux/octeon/Makefile
+++ b/target/linux/octeon/Makefile
@@ -10,8 +10,7 @@ BOARDNAME:=Cavium Networks Octeon
 FEATURES:=squashfs ramdisk pci usb
 CPU_TYPE:=octeonplus
 
-KERNEL_PATCHVER:=5.10
-KERNEL_TESTING_PATCHVER:=5.15
+KERNEL_PATCHVER:=5.15
 
 define Target/Description
 	Build firmware images for Cavium Networks Octeon-based boards.
diff --git a/target/linux/tegra/Makefile b/target/linux/tegra/Makefile
index 81db1ac5fc6..43ca154e8a0 100644
--- a/target/linux/tegra/Makefile
+++ b/target/linux/tegra/Makefile
@@ -12,8 +12,7 @@ CPU_TYPE := cortex-a9
 CPU_SUBTYPE := vfpv3-d16
 SUBTARGETS := generic
 
-KERNEL_PATCHVER := 5.10
-KERNEL_TESTING_PATCHVER := 5.15
+KERNEL_PATCHVER := 5.15
 
 include $(INCLUDE_DIR)/target.mk