diff --git a/tools/testing/selftests/arm64/mte/Makefile b/tools/testing/selftests/arm64/mte/Makefile
index 409e3e53d00af61d1a11b7018e6afdf706476019..a5a0744423d8671a2b76bdedc302892139a9cd8e 100644
--- a/tools/testing/selftests/arm64/mte/Makefile
+++ b/tools/testing/selftests/arm64/mte/Makefile
@@ -22,7 +22,6 @@ ifeq ($(mte_cc_support),1)
 TEST_GEN_PROGS := $(PROGS)
 
 # Get Kernel headers installed and use them.
-KSFT_KHDR_INSTALL := 1
 else
     $(warning compiler "$(CC)" does not support the ARMv8.5 MTE extension.)
     $(warning test program "mte" will not be created.)
diff --git a/tools/testing/selftests/arm64/signal/Makefile b/tools/testing/selftests/arm64/signal/Makefile
index ac4ad0005715be47fddcbf83248efd9d16dfa37d..be7520a863b03fdf4d2f15b8ce53b355ffc68fc1 100644
--- a/tools/testing/selftests/arm64/signal/Makefile
+++ b/tools/testing/selftests/arm64/signal/Makefile
@@ -11,7 +11,6 @@ PROGS := $(patsubst %.c,%,$(SRCS))
 TEST_GEN_PROGS := $(notdir $(PROGS))
 
 # Get Kernel headers installed and use them.
-KSFT_KHDR_INSTALL := 1
 
 # Including KSFT lib.mk here will also mangle the TEST_GEN_PROGS list
 # to account for any OUTPUT target-dirs optionally provided by
diff --git a/tools/testing/selftests/arm64/signal/test_signals.h b/tools/testing/selftests/arm64/signal/test_signals.h
index c70fdec7d7c4e827fb024d50201dc3bfc8fb6670..0c645834ddc302fd461c2e3e72f0e9c5d936bb6c 100644
--- a/tools/testing/selftests/arm64/signal/test_signals.h
+++ b/tools/testing/selftests/arm64/signal/test_signals.h
@@ -9,9 +9,7 @@
 #include <ucontext.h>
 
 /*
- * Using ARCH specific and sanitized Kernel headers installed by KSFT
- * framework since we asked for it by setting flag KSFT_KHDR_INSTALL
- * in our Makefile.
+ * Using ARCH specific and sanitized Kernel headers from the tree.
  */
 #include <asm/ptrace.h>
 #include <asm/hwcap.h>
diff --git a/tools/testing/selftests/drivers/s390x/uvdevice/Makefile b/tools/testing/selftests/drivers/s390x/uvdevice/Makefile
index 5e701d2708d45fdc1530f965d191ddb8212f6fbc..891215a7dc8a19474068e961c22a6903fef95a77 100644
--- a/tools/testing/selftests/drivers/s390x/uvdevice/Makefile
+++ b/tools/testing/selftests/drivers/s390x/uvdevice/Makefile
@@ -11,7 +11,6 @@ else
 TEST_GEN_PROGS := test_uvdevice
 
 top_srcdir ?= ../../../../../..
-KSFT_KHDR_INSTALL := 1
 khdr_dir = $(top_srcdir)/usr/include
 LINUX_TOOL_ARCH_INCLUDE = $(top_srcdir)/tools/arch/$(ARCH)/include
 
diff --git a/tools/testing/selftests/futex/functional/Makefile b/tools/testing/selftests/futex/functional/Makefile
index b8152c573e8aab568fd7ed5883071acff6ceb120..7321490116925401c71604fde59bbea39675c39c 100644
--- a/tools/testing/selftests/futex/functional/Makefile
+++ b/tools/testing/selftests/futex/functional/Makefile
@@ -22,7 +22,6 @@ TEST_GEN_FILES := \
 TEST_PROGS := run.sh
 
 top_srcdir = ../../../../..
-KSFT_KHDR_INSTALL := 1
 DEFAULT_INSTALL_HDR_PATH := 1
 include ../../lib.mk
 
diff --git a/tools/testing/selftests/kvm/Makefile b/tools/testing/selftests/kvm/Makefile
index 22423c871ed6173a354faf3d3dc6cb5103515938..120951fc304a6ddb781183b215904c76e85ee061 100644
--- a/tools/testing/selftests/kvm/Makefile
+++ b/tools/testing/selftests/kvm/Makefile
@@ -4,7 +4,6 @@ include ../../../build/Build.include
 all:
 
 top_srcdir = ../../../..
-KSFT_KHDR_INSTALL := 1
 
 # For cross-builds to work, UNAME_M has to map to ARCH and arch specific
 # directories and targets in this Makefile. "uname -m" doesn't map to
diff --git a/tools/testing/selftests/landlock/Makefile b/tools/testing/selftests/landlock/Makefile
index 0b0049e133bba0c74887989f633287d7034d85e2..1313e44e8fb974cae536d7e0305fcaf0a1472b90 100644
--- a/tools/testing/selftests/landlock/Makefile
+++ b/tools/testing/selftests/landlock/Makefile
@@ -8,7 +8,6 @@ TEST_GEN_PROGS := $(src_test:.c=)
 
 TEST_GEN_PROGS_EXTENDED := true
 
-KSFT_KHDR_INSTALL := 1
 OVERRIDE_TARGETS := 1
 include ../lib.mk
 
diff --git a/tools/testing/selftests/net/Makefile b/tools/testing/selftests/net/Makefile
index 7ea54af55490956895f8583b4afb9576ad0f1048..bc006f2693da4b930ae50da0481db3b990706a89 100644
--- a/tools/testing/selftests/net/Makefile
+++ b/tools/testing/selftests/net/Makefile
@@ -62,7 +62,6 @@ TEST_PROGS += test_vxlan_vnifiltering.sh
 
 TEST_FILES := settings
 
-KSFT_KHDR_INSTALL := 1
 include ../lib.mk
 
 include bpf/Makefile
diff --git a/tools/testing/selftests/net/mptcp/Makefile b/tools/testing/selftests/net/mptcp/Makefile
index f905d5358e681a78fcc9e7d137278cbb062556d1..1af2f66fb59aa982d14116a23f538049783b0689 100644
--- a/tools/testing/selftests/net/mptcp/Makefile
+++ b/tools/testing/selftests/net/mptcp/Makefile
@@ -1,7 +1,6 @@
 # SPDX-License-Identifier: GPL-2.0
 
 top_srcdir = ../../../../..
-KSFT_KHDR_INSTALL := 1
 
 CFLAGS =  -Wall -Wl,--no-as-needed -O2 -g -I$(top_srcdir)/usr/include $(KHDR_INCLUDES)
 
diff --git a/tools/testing/selftests/tc-testing/Makefile b/tools/testing/selftests/tc-testing/Makefile
index 4d639279f41eca6465cf5fdbadfdedd904a1a213..cb553eac9f419a38a2be6377d49b62da19f623cd 100644
--- a/tools/testing/selftests/tc-testing/Makefile
+++ b/tools/testing/selftests/tc-testing/Makefile
@@ -5,7 +5,6 @@ top_srcdir = $(abspath ../../../..)
 APIDIR := $(top_scrdir)/include/uapi
 TEST_GEN_FILES = action.o
 
-KSFT_KHDR_INSTALL := 1
 include ../lib.mk
 
 PROBE := $(shell $(LLC) -march=bpf -mcpu=probe -filetype=null /dev/null 2>&1)
diff --git a/tools/testing/selftests/vm/Makefile b/tools/testing/selftests/vm/Makefile
index 44f25acfbeca1f040a27ff6501a07d5e4e737dcf..108587cb327a93c6830df59f8be909d1a3fa0f07 100644
--- a/tools/testing/selftests/vm/Makefile
+++ b/tools/testing/selftests/vm/Makefile
@@ -94,7 +94,6 @@ TEST_PROGS := run_vmtests.sh
 TEST_FILES := test_vmalloc.sh
 TEST_FILES += test_hmm.sh
 
-KSFT_KHDR_INSTALL := 1
 include ../lib.mk
 
 $(OUTPUT)/madv_populate: vm_util.c